TWI611673B - Diversity receiver front end system with amplifier phase compensation - Google Patents

Abstract

The present invention relates to a diversity receiver front-end system with amplifier phase compensation. A receiving system may include a first amplifier disposed along a first path corresponding to a first frequency band between an input of the receiving system and an output of the receiving system. The receiving system may include a second amplifier disposed along a second path corresponding to a second frequency band between the input of the receiving system and the output of the receiving system. The receiving system may include a first phase shifting component disposed along the first path and configured to phase shift the second frequency band of a signal passing through the first phase shifting component based on the second A phase shift in the frequency band caused by the first amplifier.

Description

Diversity receiver front-end system with amplifier phase compensation Cross-reference to related applications

This application is a continuation of US Application No. 14 / 734,759, filed on June 9, 2015 and entitled DIVERSITY RECEIVER FRONT END SYSTEM WITH PHASE-SHIFTING COMPONENTS. This application claims the priority of the following applications: US Provisional Application No. 62 / 073,043, entitled DIVERSITY RECEIVER FRONT END SYSTEM, filed on October 31, 2014, and CARRIER AGGREGATION USING, filed on October 31, 2014 US Provisional Application No. 62 / 073,040 for POST-LNA PHASE MATCHING, and US Provisional Application No. 62 / 073,039, entitled PRE-LNA OUT OF BAND IMPEDANCE MATCHING FOR CARRIER AGGREGATION OPERATION, filed on October 31, 2014.

The present invention relates generally to wireless communication systems having one or more diversity receiving antennas.

In wireless communication applications, size, cost, and performance are examples of factors that may be critical to a given product. For example, to improve performance, wireless components such as diversity receive antennas and associated circuits are becoming more popular.

In many radio frequency (RF) applications, the diversity receiving antenna is physically placed away from the main antenna. When using two antennas at the same time, the transceiver can process signals from both antennas in order to increase data throughput.

According to some implementations, the invention relates to a receiving system including a controller configured to selectively activate one or more of a plurality of paths between an input of the receiving system and an output of the receiving system. . The receiving system further includes a plurality of amplifiers. Each of the plurality of amplifiers is positioned along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier. The receiving system further includes a plurality of phase shifting components. Each of the plurality of phase-shifting components is disposed along a corresponding one of the plurality of paths and is configured to phase-shift a signal passing through the phase-shifting components.

In some embodiments, a first phase-shifting component of the plurality of phase-shifting components disposed along a first path of the plurality of paths corresponding to the first frequency band may be configured such that a signal passing through the first phase-shifting component The second frequency band is phase-shifted such that a second initial signal propagating along a second path corresponding to the second frequency band of the plurality of paths is at least partially in phase with a second reflected signal propagating along the first path.

In some embodiments, a second phase shifting component of the plurality of phase shifting components disposed along the second path may be configured to phase shift a first frequency band of a signal passing through the second phase shifting component such that A first initial signal propagating through a path is at least partially in phase with a first reflected signal propagating along a second path.

In some embodiments, the first phase shifting component may be further configured to phase shift a third frequency band of a signal passing through the first phase shifting component, such that a third path corresponding to the third frequency band among the plurality of paths is followed The propagated third initial signal is at least partially in phase with the third reflected signal propagated along the first path.

In some embodiments, the first phase shifting component may be configured to phase shift the second frequency band of the signal passing through the first phase shifting component such that the second initial signal and the second reflected signal have an integer of 360 degrees. Times the phase difference.

In some embodiments, the receiving system may further include a multiplexer configured to separate an input signal received at the input into a plurality of signals that propagate along a plurality of paths under respective plurality of frequency bands. In a certain embodiment, the receiving system may further include a signal combiner configured to combine signals traveling along a plurality of paths. In some embodiments, the receiving system may further include a post-combiner amplifier disposed between the signal combiner and the output. The post-combiner amplifier is configured to amplify the signal received at the post-combiner amplifier. signal. In some embodiments, each of the plurality of phase shifting components may be disposed between the signal combiner and each of the plurality of amplifiers. In some embodiments, at least one of the plurality of amplifiers may include a two-stage amplifier.

In some embodiments, at least one of the plurality of phase shifting components may be a passive circuit. In some embodiments, at least one of the plurality of phase shifting components may be an LC circuit.

In some embodiments, at least one of the plurality of phase-shifting components may include an adjustable phase-shifting component configured to phase-shift a signal passing through the adjustable phase-shifting component by a self-controller The amount controlled by the received phase shift tuning signal.

In some embodiments, the receiving system may further include a plurality of impedance matching components, each of the impedance matching components being disposed along a corresponding one of the plurality of paths and configured to reduce the number of the corresponding ones of the plurality of paths. At least one of out-of-band noise index or out-of-band gain.

In some implementations, the invention relates to a radio frequency (RF) module that includes a package substrate configured to receive a plurality of components. The RF module further includes a receiving system implemented on the package substrate. The receiving system includes a controller configured to selectively activate one or more of a plurality of paths between an input of the receiving system and an output of the receiving system. The receiving system further includes a plurality of amplifiers. Each of the plurality of amplifiers is positioned along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier. The receiving system further includes a plurality of phase shifting components. Each of the plurality of phase shifting components is disposed along a corresponding one of the plurality of paths and is configured to shift a signal passing through the phase shifting component phase.

In some embodiments, the RF module may be a diversity receiver front-end module (FEM).

In some embodiments, a first phase shifting component of the plurality of phase shifting components disposed along a first path of the plurality of paths corresponding to a first frequency band is configured such that a first phase shifting signal of the first phase shifting component passes through the first phase shifting component. The two frequency bands are phase-shifted such that a second initial signal propagating along a second path corresponding to the second frequency band of the plurality of paths is at least partially in phase with a second reflected signal propagating along the first path.

According to some teachings, the present invention relates to a wireless device that includes a first antenna configured to receive a first radio frequency (RF) signal. The wireless device further includes a first front-end module (FEM) in communication with the first antenna. The first FEM includes a package substrate configured to receive a plurality of components. The first FEM further includes a receiving system implemented on the package substrate. The receiving system includes a controller configured to selectively activate one or more of a plurality of paths between an input of the receiving system and an output of the receiving system. The receiving system further includes a plurality of amplifiers. Each of the plurality of amplifiers is positioned along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier. The receiving system further includes a plurality of phase shifting components. Each of the plurality of phase shifting components is disposed along a corresponding one of the plurality of paths and is configured to phase shift a signal passing through the phase shifting component. The wireless device further includes a transceiver configured to receive a processed version of the first RF signal from an output via a transmission line and generate data bits based on the processed version of the first RF signal.

In some embodiments, the wireless device may further include a second antenna configured to receive a second radio frequency (RF) signal and a second FEM in communication with the first antenna. The transceiver may be configured to receive a processed version of the second RF signal from the output of the second FEM and generate data bits based on the processed version of the second RF signal.

In some embodiments, a first phase shifting component of the plurality of phase shifting components disposed along a first path of the plurality of paths corresponding to a first frequency band is configured such that the first Phase shifting in the two frequency bands, so that the The second initial signal propagating through the two paths is at least partially in phase with the second reflected signal propagating along the first path.

For the purpose of summarizing the invention, certain aspects, advantages, and novel features of the invention have been described herein. It should be understood that not all of these advantages may be achieved according to any particular embodiment of the invention. Thus, the invention may be embodied or carried out in a manner that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other advantages as may be taught or suggested herein.

This invention relates to U.S. Application No. 14 / 734,775, entitled DIVERSITY RECEIVER FRONT END SYSTEM WITH IMPEDANCE MATCHING COMPONENTS, filed on June 9, 2015, the disclosure of which is hereby expressly incorporated by reference in its entirety Included in this article.

100‧‧‧Wireless devices

110‧‧‧communication module

112‧‧‧Transceiver

114‧‧‧RF Module

116‧‧‧Diversity RF Module

120‧‧‧ Controller

130‧‧‧main antenna

135‧‧‧Transmission line

140‧‧‧Diversity antenna

200‧‧‧Diversity receiver configuration

210‧‧‧DRx front-end module

300‧‧‧Diversity receiver configuration

302‧‧‧DRx Controller

310‧‧‧DRx Module

311‧‧‧The first multiplexer

312‧‧‧Second Multiplexer

313a‧‧‧Band Pass Filter

313b‧‧‧Band Pass Filter

313c‧‧‧ Bandpass Filter

313d‧‧‧ Bandpass Filter

314a‧‧‧amplifier

314b‧‧‧amplifier

314c‧‧‧amplifier

314d‧‧‧amplifier

320‧‧‧ Diversity RF Module

321‧‧‧Diversity RF Multiplexer

323a‧‧‧Band Pass Filter

323b‧‧‧ Bandpass Filter

323c‧‧‧Band Pass Filter

323d‧‧‧ Bandpass Filter

324a‧‧‧amplifier

324b‧‧‧amplifier

324c‧‧‧amplifier

324d‧‧‧amplifier

330‧‧‧ Transceiver

400‧‧‧Diversity receiver configuration

420‧‧‧Diversity RF Module

421‧‧‧Multiplexer

424‧‧‧amplifier

500‧‧‧Diversity receiver configuration

501‧‧‧package substrate

502‧‧‧DRx Controller

510‧‧‧DRx module

511‧‧‧The first multiplexer

512‧‧‧Second Multiplexer

513‧‧‧out-of-module filter

514‧‧‧amplifier

519‧‧‧bypass switch

600‧‧‧ Diversity Receiver Module

610‧‧‧DRx Module

611‧‧‧Dual Annunciator

612‧‧‧Signal combiner

614a‧‧‧Double stage amplifier

614b‧‧‧ dual stage amplifier

615‧‧‧ rear combination amplifier

624a‧‧‧phase matching component / phase shift component

624b‧‧‧‧Phase Matching Components / Phase Shifting Components

640‧‧‧Diversity receiver configuration

641‧‧‧DRx Module

680‧‧‧Diversity receiver configuration

681‧‧‧DRx module

700‧‧‧Diversity receiver configuration

702‧‧‧DRx controller

710‧‧‧DRx Module

724a‧‧‧ Adjustable Phase Shifting Assembly

724b‧‧‧ Adjustable Phase Shifting Component

724c‧‧‧Adjustable Phase Shifting Component

724d‧‧‧Adjustable Phase Shifting Component

800‧‧‧Diversity receiver configuration

810‧‧‧DRx Module

834a‧‧‧Impedance matching component

834b‧‧‧Impedance matching component

900‧‧‧ Diversity Receiver Configuration

902‧‧‧DRx Controller

910‧‧‧DRx Module

934a‧‧‧Adjustable impedance matching component

934b‧‧‧Adjustable impedance matching component

934c‧‧‧Adjustable impedance matching component

934d‧‧‧Adjustable impedance matching component

1000‧‧‧Diversity receiver configuration

1002‧‧‧DRx Controller

1010‧‧‧DRx Module

1016‧‧‧Input adjustable impedance matching component

1017‧‧‧Output adjustable impedance matching component

1100‧‧‧Diversity receiver configuration

1102‧‧‧DRx Controller

1110‧‧‧DRx Module

1200‧‧‧Method

1210‧‧‧block

1220‧‧‧block

1230‧‧‧block

1300‧‧‧Diversity Receiver (DRx) Module

1302‧‧‧package substrate

1304‧‧‧controller

1306‧‧‧Low Noise Amplifier Assembly

1308‧‧‧Matched components

1310‧‧‧Multiplexer Assembly

1312‧‧‧Filter Bank

1314‧‧‧SMT device

1331‧‧‧Fixed or adjustable phase shifter

1332‧‧‧Fixed or adjustable impedance matching components

1400‧‧‧Wireless device

1401‧‧‧ dotted frame

1402‧‧‧user interface

1404‧‧‧Memory

1406‧‧‧Power Management Component

1408‧‧‧fundamental frequency subsystem

1410‧‧‧ Transceiver

1411‧‧‧Diversity RF Module

1414‧‧‧Antenna switch

1416‧‧‧Main Antenna

1420‧‧‧ Power Amplifier

1422‧‧‧ Matching Circuit

1424‧‧‧Duplexer

1426‧‧‧Diversity antenna

1435‧‧‧Transmission Line

FIG. 1 shows a wireless device having a communication module coupled to a main antenna and a diversity antenna.

Figure 2 shows a DRx configuration including a diversity receiver (DRx) front-end module (FEM).

FIG. 3 shows that in some embodiments, a diversity receiver (DRx) configuration may include a DRx module having multiple paths corresponding to multiple frequency bands.

FIG. 4 shows that in some embodiments, a diversity receiver configuration may include a diversity RF module having fewer amplifiers than a diversity receiver (DRx) module.

FIG. 5 shows that in some embodiments, the diversity receiver configuration may include a DRx module coupled to an out-of-module filter.

FIG. 6A shows that in some embodiments, a diversity receiver configuration may include a DRx module with one or more phase matching components.

FIG. 6B shows that in some embodiments, a diversity receiver configuration may include a DRx module having one or more phase matching components and a two-stage amplifier.

FIG. 6C shows that in some embodiments, a diversity receiver configuration may include having one or more DRx modules for phase matching components and rear combination amplifiers.

FIG. 7 shows that in some embodiments, a diversity receiver configuration may include a DRx module with an adjustable phase shifting component.

FIG. 8 shows that in some embodiments, a diversity receiver configuration may include a DRx module with one or more impedance matching components.

FIG. 9 shows that in some embodiments, a diversity receiver configuration may include a DRx module with an adjustable impedance matching component.

FIG. 10 shows that in some embodiments, a diversity receiver configuration may include a DRx module with adjustable impedance matching components disposed at the input and output.

FIG. 11 shows that in some embodiments, a diversity receiver configuration may include a DRx module with multiple adjustable components.

FIG. 12 shows an embodiment represented by a flowchart of a method of processing RF signals.

FIG. 13 depicts a module having one or more features as described herein.

FIG. 14 depicts a wireless device having one or more of the features described herein.

The headings, if any, provided herein are for convenience only and do not necessarily affect the scope or meaning of the claimed invention.

FIG. 1 shows a wireless device 100 having a communication module 110 coupled to a main antenna 130 and a diversity antenna 140. The communication module 110 (and its constituent components) can be controlled by the controller 120. The communication module 110 includes a transceiver 112 configured to convert between analog radio frequency (RF) signals and digital data signals. To this end, the transceiver 112 may include a digital analog converter, an analog digital converter, a local oscillator for modulating or demodulating a fundamental frequency analog signal to a carrier frequency, or modulating or demodulating a fundamental frequency analog signal from a carrier frequency. , A baseband processor that converts between digital samples and data bits (such as speech or other types of data), or other components.

The communication module 110 further includes a communication module 110 coupled between the main antenna 130 and the transceiver 112. RF Module 114. Since the RF module 114 may be physically close to the main antenna 130 to reduce attenuation due to cable loss, the RF module 114 may be referred to as a front-end module (FEM). The RF module 114 may perform processing on analog signals received from the main antenna 130 for the transceiver 112 or received from the transceiver 112 for transmission via the main antenna 130. To this end, the RF module 114 may include a filter, a power amplifier, a band selection switch, a matching circuit, and other components. Similarly, the communication module 110 includes a diversity RF module 116 coupled between the diversity antenna 140 and the transceiver 112 to perform similar processing.

When the signal is transmitted to the wireless device, the signal can be received at both the main antenna 130 and the diversity antenna 140. The main antenna 130 and the diversity antenna 140 may be physically spaced so as to receive signals having different characteristics at the main antenna 130 and the diversity antenna 140. For example, in one embodiment, the main antenna 130 and the diversity antenna 140 may receive signals with different attenuation, noise, frequency response, or phase shift. The transceiver 112 may use two signals having different characteristics to determine a data bit corresponding to the signal. In some implementations, the transceiver 112 selects between the main antenna 130 and the diversity antenna 140 based on these characteristics, such as selecting the antenna with the highest signal-to-noise ratio. In some implementations, the transceiver 112 combines the signals from the main antenna 130 and the diversity antenna 140 to increase the signal-to-noise ratio of the combined signal. In some implementations, the transceiver 112 processes signals to perform multiple-input / multiple-output (MIMO) communications.

Since the diversity antenna 140 is physically separated from the main antenna 130, the diversity antenna 140 is coupled to the communication module 110 through a transmission line 135, such as a cable or a printed circuit board (PCB) trace. In some implementations, the transmission line 135 is lossy and attenuates a signal received at the diversity antenna 140 before it reaches the communication module 110. Therefore, in some implementations, as described below, a gain is applied to a signal received at the diversity antenna 140. Gain (and other analog processing such as filtering) can be applied by the diversity receiver module. Since this diversity receiver module can be positioned physically close to the diversity antenna 140, it can be referred to as a diversity receiver front-end module.

Figure 2 shows a diversity receiver (DRx) configuration including a DRx front-end module (FEM) 210 200. The DRx configuration 200 includes a diversity antenna 140 configured to receive a diversity signal and provide the diversity signal to a DRx FEM 210. The DRx FEM 210 is configured to perform processing on a diversity signal received from the diversity antenna 140. For example, the DRx FEM 210 may be configured to filter the diversity signal to one or more active intermediate frequency bands, for example, as indicated by the controller 120. As another example, the DRx FEM 210 may be configured to amplify a diversity signal. To this end, the DRx FEM 210 may include filters, low noise amplifiers, band select switches, matching circuits, and other components.

The DRx FEM 210 transmits the processed diversity signal to a downstream module, such as a diversity RF (D-RF) module 116, via a transmission line 135, which feeds another processed diversity signal to the transceiver 112. The diversity RF module 116 (and, in some implementations, the transceiver) is controlled by the controller 120. In some implementations, the controller 120 may be implemented within the transceiver 112.

FIG. 3 shows that in some embodiments, a diversity receiver (DRx) configuration 300 may include a DRx module 310 having multiple paths corresponding to multiple frequency bands. The DRx configuration 300 includes a diversity antenna 140 configured to receive a diversity signal. In some implementations, the diversity signal may be a single frequency signal that includes data modulated onto a single frequency band. In some implementations, the diversity signal may be a multi-frequency signal (also known as an inter-frequency carrier aggregation signal) including data modulated onto multiple frequency bands.

The DRx module 310 has an input for receiving a diversity signal from the diversity antenna 140 and an output for providing the processed diversity signal to the transceiver 330 (via the transmission line 135 and the diversity RF module 320). The input of the DRx module 310 is fed into the input of the first multiplexer (MUX) 311. The first multiplexer 311 includes a plurality of multiplexer outputs, each of which corresponds to a path between an input and an output of the DRx module 310. Each of the paths may correspond to a respective frequency band. The output of the DRx module 310 is provided by the output of the second multiplexer 312. The second multiplexer 312 includes a plurality of multiplexer inputs, each of which corresponds to one of the paths between the input and output of the DRx module 310.

The frequency band may be a honeycomb frequency band, such as a UMTS (Universal Mobile Telecommunications System) frequency band. For example, the first frequency band may be a UMTS downlink or "Rx" band 2 between 1930 megahertz (MHZ) and 1990 MHz, and the second frequency band may be a UMTS downlink between 869 MHz and 894 MHz or "Rx" band 5. Other downlink frequency bands may be used, such as those described below in Table 1 or other non-UMTS frequency bands.

In some implementations, the DRx module 310 includes a DRx controller 302 that receives signals from the controller 120 (also known as a communication controller) and selectively initiates between input and output based on the received signals One or more of a plurality of paths. In some implementations, the DRx module 310 does not include the DRx controller 302, and the controller 120 directly and selectively activates one or more of the plurality of paths.

As mentioned above, in some implementations, the diversity signal is a single frequency signal. Therefore, in some implementations, the first multiplexer 311 is a single-pole / multi-throw (SPMT) switch that routes a diversity signal to a frequency band corresponding to a single-frequency signal in a plurality of paths based on a signal received from the DRx controller 302 One of them. The DRx controller 302 may generate a signal based on a band selection signal received by the DRx controller 302 from the communication controller 120. Similarly, in some implementations, the second multiplexer 312 is an SPMT switch that routes signals from one of a plurality of paths corresponding to a frequency band of a single frequency signal based on a signal received from the DRx controller 302.

As mentioned above, in some implementations, the diversity signal is a multi-frequency signal. Therefore, in some implementations, the first multiplexer 311 is a signal splitter that routes a diversity signal to two or two of a plurality of paths corresponding to a multi-frequency signal based on a splitter control signal received from the DRx controller 302. Two or more of more than one frequency band. The function of the demultiplexer can be implemented as a SPMT switch, a dual-sense filter, or some combination of these components. Similarly, in some implementations, the second multiplexer 312 is a signal combiner, which is based on the combiner control signal received from the DRx controller 302 to combine two or more of the multiple paths corresponding to the multi-frequency signal Signals in two or more bands. The function of the signal combiner can be implemented as a SPMT switch, a dual-sensor filter, or some combination of these components. DRx controller 302 can The splitter control signal and the combiner control signal are generated based on the band selection signal received by the DRx controller 302 from the communication controller 120.

Accordingly, in some implementations, the DRx controller 302 is configured to selectively activate one or more of the plurality of paths based on a band selection signal received by the DRx controller 302 (eg, from the communication controller 120). In some implementations, the DRx controller 302 is configured to selectively activate one or more of the plurality of paths by transmitting a splitter control signal to the demultiplexer and a combiner control signal to the signal combiner. .

The DRx module 310 includes a plurality of band-pass filters 313a to 313d. Each of the band-pass filters 313a to 313d is disposed along a corresponding one of the plurality of paths and configured to filter a signal received at the band-pass filter to a respective frequency band of one of the plurality of paths. In some implementations, the band-pass filters 313a-313d are further configured to filter signals received at the band-pass filters to downlink sub-bands of respective frequency bands of one of the plurality of paths. The DRx module 310 includes a plurality of amplifiers 314a to 314d. Each of the amplifiers 314a to 314d is disposed along a corresponding one of the plurality of paths and is configured to amplify a signal received at the amplifier.

In some implementations, the amplifiers 314a to 314d are narrow-band amplifiers configured to amplify signals within respective frequencies of the path in which the amplifier is disposed. In some implementations, the amplifiers 314a to 314d may be controlled by the DRx controller 302. For example, in some implementations, each of the amplifiers 314a-314d includes an enable / disable input and is enabled (or disabled) based on the received amplifier enable signal and the enable / disable input. The amplifier enable signal may be transmitted by the DRx controller 302. Therefore, in some implementations, the DRx controller 302 is configured to be selective by transmitting an amplifier enable signal to one or more of the amplifiers 314a to 314d respectively disposed along one or more of a plurality of paths. Ground one or more of the plurality of paths. In such implementations, unlike being controlled by the DRx controller 302, the first multiplexer 311 may be a signal splitter that routes diversity signals to each of a plurality of paths, and the second multiplexer 312 may be Combining signals from each of a plurality of paths Signal combiner. However, in the implementation where the DRX controller 302 controls the first multiplexer 311 and the second multiplexer 312, the DRX controller 302 can also enable (or disable) specific amplifiers 314a to 314d (for example) to save battery.

In some implementations, the amplifiers 314a to 314d are variable gain amplifiers (VGA). Therefore, in some implementations, the DRx module 310 includes a plurality of variable gain amplifiers (VGAs), each of which is disposed along a corresponding one of the plurality of paths, and is configured to be amplified at the VGA The received signal, the VGA has a gain controlled by an amplifier control signal received from the DRx controller 302.

The gain of VGA can be bypassable, variable step size, continuously variable. In some implementations, at least one of the VGAs includes a fixed gain amplifier and a bypass switch controllable by an amplifier control signal. The bypass switch (in the first position) closes the line from the input of the fixed gain amplifier to the output of the fixed gain amplifier, allowing the signal to bypass the fixed gain amplifier. The bypass switch (in the second position) opens the line between the input and output, allowing the signal to pass through the fixed gain amplifier. In some implementations, when the bypass switch is in the first position, the fixed gain amplifier is disabled or otherwise reconfigured to accommodate the bypass mode.

In some implementations, at least one of the VGAs includes a variable step gain amplifier configured to amplify a signal received at the VGA, the VGA having one of a plurality of configured quantities indicated by an amplifier control signal Gain. In some implementations, at least one of the VGAs includes a continuously variable gain amplifier configured to amplify a signal received at a VGA having a gain proportional to the amplifier control signal.

In some implementations, the amplifiers 314a to 314d are variable current amplifiers (VCAs). The current drawn by the VCA can be bypassable, variable step size, and continuously variable. In some implementations, at least one of the VCAs includes a fixed current amplifier and a bypass switch controllable by an amplifier control signal. The bypass switch (in the first position) closes the line from the input of the fixed current amplifier to the output of the fixed current amplifier, thereby allowing signals to bypass the fixed current amplifier. The bypass switch (in the second position) opens the line between input and output, This allows the signal to pass through a fixed current amplifier. In some implementations, when the bypass switch is in the first position, the fixed current amplifier is disabled or otherwise reconfigured to accommodate the bypass mode.

In some implementations, at least one of the VCAs includes a variable step current amplifier configured to amplify at the VCA by drawing current from one of a plurality of configured quantities indicated by the amplifier control signal. Received signal. In some implementations, at least one of the VCAs includes a continuously variable current amplifier configured to amplify a signal received at the VCA by drawing a current proportional to the amplifier control signal.

In some implementations, the amplifiers 314a to 314d are fixed gain, fixed current amplifiers. In some implementations, the amplifiers 314a to 314d are fixed gain, variable current amplifiers. In some implementations, the amplifiers 314a to 314d are variable gain, fixed current amplifiers. In some implementations, the amplifiers 314a to 314d are variable gain, variable current amplifiers.

In some implementations, the DRx controller 302 generates an amplifier control signal based on a quality of service metric of an input signal received at an input. In some implementations, the DRx controller 302 generates an amplifier control signal based on a signal received from the communication controller 120, which in turn may be based on a quality of service (Qos) measurement of the received signal. The QoS metric of the received signal may be based at least in part on a diversity signal received on the diversity antenna 140 (eg, an input signal received at an input). The QoS metric of the received signal may be further based on the signal received on the primary antenna. In some implementations, the DRx controller 302 generates amplifier control signals based on the QoS metrics of the diversity signals without receiving signals from the communication controller 120.

In some implementations, the QoS metric includes signal strength. As another example, a QoS metric may include a bit error rate, data throughput, transmission delay, or any other QoS metric.

As described above, the DRx module 310 has an input for receiving a diversity signal from the diversity antenna 140 and an output for providing the processed diversity signal to the transceiver 330 (via the transmission line 135 and the diversity RF module 320). The diversity RF module 320 receives the processed diversity signal via the transmission line 135 and performs further processing. In detail, the processed diversity signals are separated or routed to one or more paths by the diversity RF multiplexer 321, and the separated or routed signals are routed by corresponding bands on these paths. The pass filters 323a to 323d are filtered and amplified by the corresponding amplifiers 324a to 324d. The output of each of the amplifiers 324a to 324d is provided to the transceiver 330.

The diversity RF multiplexer 321 can be controlled by the controller 120 (directly or via an on-chip diversity RF controller) to selectively activate one or more of the paths. Similarly, the amplifiers 324a to 324d may be controlled by the controller 120. For example, in some implementations, each of the amplifiers 324a-324d includes an enable / disable input and is enabled (or disabled) based on the amplifier enable signal. In some implementations, the amplifiers 324a to 324d are variable gain amplifiers (VGAs) that amplify a signal received at the VGA with a gain controlled by an amplifier control signal received from the controller 120 (or a chip controlled by the controller 120) Diversity RF Controller). In some implementations, the amplifiers 324a to 324d are variable current amplifiers (VCAs).

Where the DRx module 310 added to the receiver chain already includes the diversity RF module 320, the number of bandpass filters in the DRx configuration 300 is doubled. Therefore, in some implementations, the band-pass filters 323a to 323d are not included in the diversity RF module 320. Specifically, the band pass filters 313a to 313d of the DRx module 310 are used to reduce the strength of the out-of-band blocker. In addition, the AGC table of the diversity RF module 320 may be shifted to reduce the amount of gain provided by the amplifiers 324a to 324d of the diversity RF module 320 to the gain provided by the amplifiers 314a to 314d of the DRx module 310. the amount.

For example, if the DRx module gain is 15dB and the receiver sensitivity is -100dBm, the diversity RF module 320 will reach a sensitivity of -85dBm. If the closed-loop AGC of the diversity RF module 320 is active, its gain will automatically drop by 15dB. However, both the signal component and the out-of-band blocker are amplified by 15 dB on reception. Therefore, the 15dB gain reduction of the diversity RF module 320 can also be accompanied by a 15dB increase in its linearity. In detail, the amplifiers 324a to 324d of the diversity RF module 320 may be designed so that the linearity of the amplifier increases with decreasing gain (or increasing current).

In some implementations, the controller 120 controls the gain (and / or current) of the amplifiers 314a to 314d of the DRx module 310 and the amplifiers 324a to 324d of the diversity RF module 320. As above In an example, in response to increasing the amount of gain provided by the amplifiers 314a to 314d of the DRx module 310, the controller 120 may reduce the amount of gain provided by the amplifiers 324a to 324d of the diversity RF module 320. Therefore, in some implementations, the controller 120 is configured to generate downstream amplifier control signals (amplifiers 324a to 324d for the diversity RF module 320) based on the amplifier control signals (the amplifiers 314a to 314d for the DRx module 310) The gain of one or more downstream amplifiers 324a to 324d coupled to the (of the DRx module 310) output is controlled via the transmission line 135. In some implementations, the controller 120 also controls the gain of other components of the wireless device, such as amplifiers in a front-end module (FEM), based on the amplifier control signals.

As mentioned above, in some implementations, the band-pass filters 323a to 323d are not included. Therefore, in some implementations, at least one of the downstream amplifiers 324a to 324d is coupled to the output (of the DRx module 310) via the transmission line 135 without passing through a downstream bandpass filter.

FIG. 4 shows that in some embodiments, a diversity receiver configuration 400 may include a diversity RF module 420 having fewer amplifiers than a diversity receiver (DRx) module 310. The diversity receiver configuration 400 includes a diversity antenna 140 and a DRx module 310 as described above with respect to FIG. 3. The output of the DRx module 310 is transmitted to the diversity RF module 420 which is different from the diversity RF module 320 of FIG. 3 via the transmission line 135, except that the diversity RF module 420 of FIG. 4 includes fewer amplifiers than the DRx module 310.

As mentioned above, in some implementations, the diversity RF module 420 does not include a band-pass filter. Therefore, in some implementations, one or more of the amplifiers 424 of the diversity RF module 420 need not be band-specific. In detail, the diversity RF module 420 may include one or more paths that are not mapped one-to-one with the paths of the DRx module 310, and each path includes an amplifier 424. This map of paths (or corresponding amplifiers) may be stored in the controller 120.

Therefore, although the DRx module 310 includes several paths each corresponding to a frequency band, the diversity RF module 420 may include one or more paths that do not correspond to a single frequency band.

In some implementations (as shown in FIG. 4), the diversity RF module 420 includes a single broadband or adjustable bandwidth that amplifies the signal received from the transmission line 135 and outputs the amplified signal to the multiplexer 421. Amplifier 424. The multiplexer 421 includes a plurality of multiplexer outputs, each of which corresponds to a respective frequency band. In some implementations, the diversity RF module 420 does not include any amplifiers.

In some implementations, the diversity signal is a single frequency signal. Therefore, in some implementations, the multiplexer 421 is an SPMT switch that routes a diversity signal to one of a plurality of output terminals corresponding to a frequency band of a single-frequency signal based on a signal received from the controller 120. In some implementations, the diversity signal is a multi-frequency signal. Therefore, in some implementations, the multiplexer 421 is a signal splitter that routes a diversity signal to two or more frequency bands corresponding to a multi-frequency signal in a plurality of outputs based on a splitter control signal received from the controller 120. Two or more. In some implementations, the diversity RF module 420 may be combined with the transceiver 330 into a single module.

In some implementations, the diversity RF module 420 includes multiple amplifiers, each corresponding to a set of frequency bands. The signal from the transmission line 135 may be fed into a band splitter that outputs a higher frequency to a high-frequency amplifier along a first path and a lower frequency to a low-frequency amplifier along a second path. The output of each of the amplifiers may be provided to a multiplexer 421 configured to route a signal to a corresponding input of the transceiver 330.

FIG. 5 shows that in some embodiments, the diversity receiver configuration 500 may include a DRx module 510 coupled to an out-of-module filter 513. The DRx module 510 may include a package substrate 501 configured to receive a plurality of components and a receiving system implemented on the package substrate 501. The DRx module 510 may include one or more signal paths that are routed away from the DRx module 510 and may be used by a system integrator, designer, or manufacturer to support filters for any desired frequency band.

The DRx module 510 includes several paths between the input and output of the DRx module 510. The DRx module 510 includes a bypass path between the input and output. The bypass path is activated by a bypass switch 519 controlled by the DRx controller 502. Although FIG. 5 illustrates a single bypass switch 519, in some implementations, the bypass switch 519 may include multiple switches (e.g., a first switch near the input on the disposed entity and a second switch near the output on the disposed entity turn off). As shown in Figure 5, the bypass path does not include a filter or amplifier.

The DRx module 510 includes a plurality of multiplexer paths, and the paths include a first multiplexer 511 and a second multiplexer 512. The multiplexer path includes a number of paths on a module, which include a first multiplexer 511, band-pass filters 313a to 313d implemented on the package substrate 501, and an amplifier 314a implemented on the package substrate 501 To 314d and the second multiplexer 512. The multiplexer path includes one or more out-of-module paths. The one or more out-of-module paths include a first multiplexer 511, a band-pass filter 513 implemented outside the package substrate 501, an amplifier 514, and a second multi-path.工 器 512。 512. The amplifier 514 may be a wideband amplifier implemented on the package substrate 501 or may be implemented outside the package substrate 501. As described above, the amplifiers 314a to 314d, 514 may be variable gain amplifiers and / or variable current amplifiers.

The DRx controller 502 is configured to selectively activate one or more of a plurality of paths between input and output. In some implementations, the DRx controller 502 is configured to selectively activate one or more of the plurality of paths based on a band selection signal received by the DRx controller 502 (eg, from a communication controller). The DRx controller 502 may selectively initiate a path by, for example, opening or closing the bypass switch 519, enabling or disabling the amplifiers 314a to 314d, 514, controlling the multiplexers 511, 512, or via other mechanisms. For example, the DRx controller 502 may follow a path (e.g., a path between filters 313a to 313d, 513 and amplifiers 314a to 314d, 514) or by setting the gains of amplifiers 314a to 314d, 514 to be substantially 0 to open or close the switch.

FIG. 6A shows that in some embodiments, a diversity receiver configuration 600 may include a DRx module 610 with one or more phase matching components 624a-624b. The DRx module 610 includes two paths: an input from the DRx module 610 is coupled to the antenna 140; and an output from the DRx module 610 is coupled to the transmission line 135.

In the DRx module 610 of FIG. 6A, the signal splitter and the band-pass filter are implemented as a dual-spreader 611. The dual-sensor 611 includes an input coupled to the antenna 140, a first output coupled to the first amplifier 314a, and a second output coupled to the second amplifier 314b. In the first output , The dual-sensor 611 outputs the filtered signal received at the input (eg, from the antenna 140) to the first frequency band. At the second output, the duplexer 611 outputs the filtered signal received at the input to the second frequency band. In some implementations, the duplexer 611 may be replaced with a triplexer, quadruplexer, or any other multiplexer that is configured to separate the input signal received at the input of the DRx module 610 into an A plurality of signals propagating along a plurality of paths in each of a plurality of frequency bands.

As described above, each of the amplifiers 314a to 314b is positioned along a corresponding one in the path and configured to amplify a signal received at the amplifier. The outputs of the amplifiers 314a to 314b are fed in via corresponding phase shifting components 624a to 624b before being combined by the signal combiner 612.

The signal combiner 612 includes a first input coupled to the first phase shifting component 624a, a second input coupled to the second phase shifting component 624b, and an output coupled to the output of the DRx module 610. The signal at the output of the signal combiner is the sum of the signals at the first input and the second input. Therefore, the signal combiner is configured to combine signals traveling along a plurality of paths.

When a signal is received through the antenna 140, the signal is filtered by the dual-sensor 611 to a first frequency band and propagates along a first path through the first amplifier 314a. The filtered and amplified signal is phase shifted by the first phase shifting component 624a and fed to the first input of the signal combiner 612. In some implementations, the signal combiner 612 or the second amplifier 314b does not prevent the signal from continuing to pass through the signal combiner 612 in the reverse direction along the second path. Therefore, the signal propagates through the second phase shifting component 624b and through the second amplifier 314b, where the signal is reflected away from the duplexer 611. The reflected signal propagates through the second amplifier 314b and the second phase shifting component 624b to reach the second input of the signal combiner 612.

When the initial signal (at the first input of signal combiner 612) and the reflected signal (at the second input of signal combiner 612) are out of phase, the summation performed by signal combiner 612 results in The signal at the output is weakened. Similarly, when the initial signal is in phase with the reflected signal, the summation performed by the signal combiner 612 results in a signal enhancement at the output of the signal combiner 612. Therefore, in some implementations, the second phase shift component 624b is configured To phase-shift the signal (at least in the first frequency band) such that the initial signal and the reflected signal are at least partially in-phase. In detail, the second phase shifting component 624b is configured to phase shift the signal (at least in the first frequency band) so that the amplitude of the sum of the initial signal and the reflected signal is greater than the amplitude of the initial signal.

For example, the second phase-shifting component 624b may be configured to phase-shift the signal passing through the second phase-shifting component 624b by back propagation through the second amplifier 314b, reflection from the dual-sensor 611, and -1/2 times the phase shift introduced by the forward propagation through the second amplifier 314b. As another example, the second phase shifting component 624b may be configured to phase-shift the signal passing through the second phase shifting component 624b by 360 degrees and back-propagate through the second amplifier 314b and leave the dual-sensor 611. One half of the difference between the reflection and the phase shift introduced by the forward propagation through the second amplifier 314b. Generally speaking, the second phase shifting component 624b can be configured to phase shift the signal passing through the second phase shifting component 624b, so that the initial signal and the reflected signal have a phase difference that is an integer multiple of 360 degrees (including 0). .

As an example, the initial signal may be at 0 degrees (or any other reference phase), and back propagation through the second amplifier 314b, reflection away from the dual-sensor 611, and forward propagation through the second amplifier 314b may be introduced by 140 Degrees of phase shift. Therefore, in some implementations, the second phase shifting component 624b is configured to phase shift the signal through the second phase shifting component 624b by -70 degrees. Therefore, the initial signal is phase-shifted to -70 degrees by the second phase-shifting component 624b, through back propagation through the second amplifier 314b, reflection leaving the dual-sensor 611, and forward through the second amplifier 314b. The propagation is phase-shifted to 70 degrees, and is phase-shifted back to 0 degrees by the second phase-shifting component 624b.

In some implementations, the second phase shifting component 624b is configured to shift the signal passing through the second phase shifting component 624b by 110 degrees. Therefore, the initial signal is phase-shifted to 110 degrees by the second phase shifting component 624b, and is propagated backward through the second amplifier 314b, reflected off the dual signal 611, and propagated forward through the second amplifier 314b Phase shifted to 250 degrees and phase shifted to 360 degrees by the second phase shifting component 624b.

At the same time, the signal received by the antenna 140 is filtered to the second frequency band by the dual signal 611 and propagates along the second path passing through the second amplifier 314b. The filtered and amplified signal is phase shifted by the second phase shifting component 624b and fed to the second input of the signal combiner 612. In some implementations, the signal combiner 612 or the first amplifier 314a does not prevent the signal from continuing to pass through the signal combiner 612 in the reverse direction along the first path. As a result, the signal propagates through the first phase-shifting component 624a and through the second amplifier 314a, where the signal is reflected away from the duplexer 611. The reflected signal propagates through the first amplifier 314a and the first phase shifting component 624a to reach the first input of the signal combiner 612.

When the initial signal (at the second input of signal combiner 612) and the reflected signal (at the first input of signal combiner 612) are out of phase, the summation performed by signal combiner 612 results in an output at signal combiner 612 The signal at is weakened, and when the initial signal is in phase with the reflected signal, the summation performed by the signal combiner 612 results in an increase in the signal at the output of the signal combiner 612. Therefore, in some implementations, the first phase shifting component 624a is configured to phase shift (at least in the second frequency band) the signal such that the initial signal and the reflected signal are at least partially in phase.

For example, the first phase shifting component 624a may be configured such that the phase shifting of the signal passing through the first phase shifting component 624a is caused by the back propagation through the first amplifier 314a, the reflection leaving the dual-sensor 611, and the -1/2 times the phase shift introduced by the forward propagation through the first amplifier 314a. As another example, the first phase-shifting component 624a may be configured to phase-shift the signal passing through the first phase-shifting component 624a by 360 degrees and backpropagate through the first amplifier 314a and leave the Half of the difference between the reflection and the phase shift introduced by the forward propagation through the first amplifier 314a. Generally speaking, the first phase shifting component 624a can be configured to phase shift the signal passing through the first phase shifting component 624a, so that the initial signal and the reflected signal have a phase difference that is an integer multiple of 360 degrees (including 0). .

The phase shifting components 624a to 624b may be implemented as a passive circuit. In detail, the phase shifting components 624a to 624b may be implemented as an LC circuit and include one or more passive components such as inductors and / or Capacitor. The passive components may be connected in parallel and / or in series and may be connected between the outputs of the amplifiers 314a to 314b and the input of the signal combiner 612, or may be connected between the output of the amplifiers 314a to 314b and the ground voltage. In some implementations, the phase shifting components 624a-624b are integrated into the same die as the amplifiers 314a-314b or integrated on the same package as the amplifiers 314a-314b.

In some implementations (eg, as shown in FIG. 6A), the phase shifting components 624a to 624b are disposed along the path after the amplifiers 314a to 314b. Therefore, any signal attenuation generated by the phase shifting components 624a to 624b does not affect the performance of the module 610, such as the signal-to-noise ratio of the output signal. However, in some implementations, the phase shifting components 624a to 624b are positioned along the path before the amplifiers 314a to 314b. For example, the phase shifting components 624a to 624b may be integrated into an impedance matching component disposed between the duplexer 611 and the amplifiers 314a to 314b.

FIG. 6B shows that in some embodiments, the diversity receiver configuration 640 may include a DRx module 641 having one or more phase matching components 624a to 624b and two-stage amplifiers 614a to 614b. The DRx module 641 of FIG. 6B is substantially similar to the DRx module 610 of FIG. 6A, except that the amplifier in the DRx module 610 of FIG. 6A is replaced with the two-stage amplifiers 614a to 614b of the DRx module 641 of FIG. 6B. 314a to 314b.

FIG. 6C shows that in some embodiments, the diversity receiver configuration 680 may include a DRx module 681 having one or more phase matching components 624a to 624b and a rear combination amplifier 615. The DRx module 681 of FIG. 6C is substantially similar to the DRx module 610 of FIG. 6A, except that the DRx module 681 of FIG. 6C includes a Restoring combination amplifier 615. Like the amplifiers 314a to 314b, the rear combination amplifier 615 may be a variable gain amplifier (VGA) and / or a variable current amplifier controlled by a DRx controller (not shown).

FIG. 7 shows that in some embodiments, a diversity receiver configuration 700 may include a DRx module 710 with adjustable phase shifting components 724a to 724d. Each of the adjustable phase shifting components 724a to 724d can be configured to phase shift the signal passing through the adjustable phase shifting component from the DRx controller 702 The amount controlled by the received phase shift tuning signal.

The diversity receiver configuration 700 includes a DRx module 710 having an input coupled to an antenna 140 and an output coupled to a transmission line 135. The DRx module 710 includes several paths between the input and output of the DRx module 710. In some implementations, the DRx module 710 includes one or more bypass paths (not shown) between an input and an output activated by one or more bypass switches controlled by the DRx controller 702.

The DRx module 710 includes a plurality of multiplexer paths. The multiplexer paths include an input multiplexer 311 and an output multiplexer 312. The multiplexer path includes several paths on the module (shown). The paths on these modules include input multiplexer 311, band-pass filters 313a to 313d, amplifiers 314a to 314d, and adjustable phase shifting components 724a to 724d. An output multiplexer 312 and a rear combination amplifier 615. The multiplexer path may include one or more off-module paths (not shown) as described above. As also described above, the amplifiers 314a to 314d (including the post gain amplifier 615) may be variable gain amplifiers and / or variable current amplifiers.

The adjustable phase shifting components 724a to 724d may include one or more variable components such as inductors and capacitors. The variable components may be connected in parallel and / or in series and may be connected between the outputs of the amplifiers 314a to 314d and the input of the output multiplexer 312, or may be connected between the output of the amplifiers 314a to 314d and the ground voltage.

The DRx controller 702 is configured to selectively activate one or more of a plurality of paths between input and output. In some implementations, the DRx controller 702 is configured to selectively activate one or more of the plurality of paths based on a band selection signal received by the DRx controller 702 (eg, from a communication controller). The DRx controller 702 may, for example, selectively enable paths by enabling or disabling amplifiers 314a to 314d, controlling multiplexers 311, 312, or via other mechanisms as described above.

In some implementations, the DRx controller 702 is configured to tune the adjustable phase shifting components 724a to 724d. In some implementations, the DRx controller 702 tunes the adjustable phase shifting components 724a through 724d based on a band selection signal. For example, the DRx controller 702 may The look-up table associated with the frequency band (or set of frequency bands) indicated by the signal and the tuning parameter is used to tune the adjustable phase shifting components 724a to 724d. Therefore, in response to the band selection signal, the DRx controller 702 can transmit the phase shift tuning signal to the adjustable phase shifting components 724a to 724d in each active path to tune the adjustable phase shifting component (or its variable Component).

The DRx controller 702 may be configured to tune the adjustable phase shifting components 724a to 724d such that the out-of-frequency reflected signal and the out-of-frequency initial signal are in phase at the output multiplexer 312. For example, if the activation band selection signal indicates the first path (through the first amplifier 314a) corresponding to the first frequency band, the second path (through the second amplifier 314b) and the third path corresponding to the second frequency band (Through the third amplifier 314c), the DRx controller 702 can tune the first adjustable phase shifting component 724a so that: (1) for a signal traveling along the second path (in the second frequency band), the initial signal In phase with a reflected signal that propagates backward along the first path, reflects away from the band-pass filter 313a, and propagates forward through the first path; and (2) for signals propagating along the third path (in the third frequency band) The initial signal is in phase with the reflected signal that propagates in the reverse direction along the first path, reflects away from the band-pass filter 313a, and propagates forward through the first path.

The DRx controller 702 may tune the first adjustable phase shifting component 724a so that the second frequency band is phase shifted by an amount different from the third frequency band. For example, if the signal in the second frequency band is phase-shifted by 140 degrees and the third frequency band passes back through the first amplifier 314a, reflects off the band-pass filter 313a, and passes through the first amplifier 314b. By propagating forward by 130 degrees, the DRx controller 702 may tune the first adjustable phase shifting component 724a to shift the second frequency band by 70 degrees (or 110 degrees) and the third frequency band by 65 degrees (or 115 degrees). degree).

The DRx controller 702 can similarly tune the second and third phase shifting components 724b and 724c.

As another example, if the activation band selection signal indicates the first path, the second path, and the fourth path (through the fourth amplifier 314d), the DRx controller 702 may tune the first adjustable phase shifting component 724a so that: (1) For a signal propagating along the second path (in the second frequency band), the initial signal propagates backwards along the first path, reflects off the band-pass filter 313a, and The reflected signal propagating forward through the first path is in phase; and (2) For a signal propagating along the fourth path (in the fourth frequency band), the initial signal is propagated in the reverse direction along the first path and reflected away from the bandpass filtering And the reflected signal propagating forward through the first path is in phase.

The DRx controller 702 can tune the variable components in the adjustable phase shifting components 724a to 724d to make different sets of frequency bands have different values.

In some implementations, the adjustable phase shifting components 724a to 724d are replaced with fixed phase shifting components that are not adjustable or controlled by the DRx controller 702. Each of the phase shifting components placed along a counterpart in a path corresponding to one frequency band may be configured to phase shift each of the other frequency bands such that the initial signal along the other corresponding path and the path along the path One of them propagates back, the reflected signal that leaves the corresponding band-pass filter and propagates forward through one of the paths is in phase.

For example, the third phase-shifting component 724c may be fixed and configured to: (1) phase-shift the first frequency band so that the initial signal at the first frequency (propagating along the first path) and along the third path Backpropagation, reflection The reflected signal leaving the third band-pass filter 313c and propagating forward through the third path is in phase; (2) Phase shifting the second frequency band so that at the second frequency (propagating along the second path) The initial signal is in phase with the reflected signal that propagates backward along the third path, reflects away from the third band-pass filter 313c, and propagates forward through the third path; and (3) phase-shifts the fourth frequency band so that in the fourth The initial signal at the frequency (propagated along the fourth path) is in phase with the reflected signal that propagates backward along the third path, reflects off the third band-pass filter 313c, and propagates forward through the third path. Other phase-shifting components can be fixed and configured in a similar manner.

Accordingly, the DRx module 710 includes a DRx controller 702 configured to selectively enable one or more of a plurality of paths between the input of the DRx module 710 and the output of the DRx module 710. The DRx module 710 further includes a plurality of amplifiers 314a to 314d, each of the plurality of amplifiers 314a to 314d being disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier. The DRx module further includes a plurality of phase shifting components 724a to 724d, each of the plurality of phase shifting components 724a to 724d follows a plurality of The counterparts in the path are positioned and configured to phase-shift the signal through the phase-shifting component.

In some implementations, the first phase shifting component 724a is disposed along a first path corresponding to a first frequency band (e.g., the frequency band of the first bandpass filter 313a) and is configured to pass through the first phase shifting component 724a. The second frequency band of the signal (for example, the frequency band of the second band-pass filter 313b) is phase shifted so that the initial signal propagating along the second path corresponding to the second frequency band and the reflected signal propagating along the first path are at least partially in phase.

In some implementations, the first phase shifting component 724a is further configured to phase shift a third frequency band of the signal passing through the first phase shifting component 724a (eg, the frequency band of the third bandpass filter 313c) such that The initial signal propagating through the third path corresponding to the third frequency band is at least partially in phase with the reflected signal propagating along the first path.

Similarly, in some implementations, the second phase shifting component 724b disposed along the second path is configured to phase shift the first frequency band of the signal passing through the second phase shifting component 724b such that the The initial signal is at least partially in-phase with the reflected signal traveling along the second path.

FIG. 8 shows that in some embodiments, a diversity receiver configuration 800 may include a DRx module 810 having one or more impedance matching components 834a-834b. The DRx module 810 includes two paths: an input from the DRx module 810, which is coupled to the antenna 140, and an output from the DRx module 810, which is coupled to the transmission line 135.

In the DRx module 810 of FIG. 8 (as in the DRx module 610 of FIG. 6A), the signal splitter and the band-pass filter are implemented as a dual-spreader 611. The dual-sensor 611 includes an input coupled to the antenna, a first output coupled to the first impedance matching component 834a, and a second output coupled to the second impedance matching component 834b. At the first output, the duplexer 611 outputs the filtered signal received at the input (eg, from the antenna 140) to the first frequency band. At the second output, the duplexer 611 outputs the filtered signal received at the input to the second frequency band.

Each of the impedance matching components 834a to 634d is disposed between the duplexer 611 and the amplifiers 314a to 314b. As described above, each of the amplifiers 314a to 314b is placed along a corresponding one in the path, and is configured to amplify a signal received at the amplifier. put The outputs of the amplifiers 314a to 314b are fed to a signal combiner 612.

The signal combiner 612 includes a first input coupled to the first amplifier 314a, a second input coupled to the second amplifier 314b, and an output coupled to an output of the DRx module 610. The signal at the output of the signal combiner is the sum of the signals at the first input and the second input.

When a signal is received through the antenna 140, the signal is filtered by the dual-sensor 611 to a first frequency band and propagates along a first path passing through the first amplifier 314a. Similarly, the signal is filtered by the duplexer 611 to the second frequency band and propagates along a second path through the second amplifier 314b.

Each of the paths can be characterized as noise index and gain. The noise index of each path is a representation of the degradation of the signal-to-noise ratio (SNR) caused by amplifiers and impedance matching components placed along the path. In detail, the noise index of each path is the decibel (dB) difference between the SNR at the input of the impedance matching components 834a to 834b and the SNR at the outputs of the amplifiers 314a to 314b. Thus, the noise index is a measure of the difference between the noise output of an amplifier and the noise output of an "ideal" amplifier (which does not generate noise) with the same gain. Similarly, the gain of each path is a representation of the gain caused by amplifiers and impedance matching components placed along the path.

The noise index and gain of each path can be different for different frequency bands. For example, the first path may have an in-frequency noise index and an in-frequency gain for the first frequency band, and an out-of-frequency noise index and an out-of-frequency gain for the second frequency band. Similarly, the second path may have an in-frequency noise index and an in-frequency gain for the second frequency band, and an out-of-frequency noise index and an out-of-frequency gain for the first frequency band.

The DRx module 810 can also be characterized as a different noise index and gain for different frequency bands. In detail, the noise index of the DRx module 810 is the difference in dB between the SNR at the input of the DRx module 810 and the SNR at the output of the DRx module 810.

The noise index and gain of each path (in each frequency band) may depend at least in part on the impedance (in each frequency band) of the impedance matching components 834a to 834b. So it may be beneficial Yes, the impedance of the impedance matching components 834a to 834b minimizes the in-frequency noise index of each path and / or maximizes the in-frequency gain of each path. Therefore, in some implementations, each of the impedance matching components 834a to 834b is configured to reduce the in-frequency noise index of its respective path and / or increase its in-frequency gain (compared to DRx module with such impedance matching components 834a to 834b).

Since the signals traveling along the two paths are combined by the signal combiner 612, out-of-frequency noise generated or amplified by the amplifier can have a negative effect on the combined signal. For example, the out-of-frequency noise generated or amplified by the first amplifier 314a can increase the noise index of the DRx module 810 at the second frequency. Therefore, it may be advantageous that the impedance of the impedance matching components 834a to 834b minimizes the out-of-frequency noise index of each path and / or minimizes the out-of-frequency gain of each path. Therefore, in some implementations, each of the impedance matching components 834a to 834b is configured to reduce the out-of-frequency noise index of its respective path and / or reduce the out-of-frequency gain of its respective path (compared to DRx module with such impedance matching components 834a to 834b).

The impedance matching components 834a to 834b may be implemented as a passive circuit. In detail, the impedance matching components 834a to 834b may be implemented as RLC circuits and include one or more passive components such as resistors, inductors, and / or capacitors. The passive component may be connected in parallel and / or in series and may be connected between the output of the dual-sensor 611 and the input of the impedance matching components 314a to 314b, or may be connected between the output of the dual-sensor 611 and the ground voltage. In some implementations, the impedance matching components 834a-834b are integrated into the same die or the same package as the amplifiers 314a-314b.

As mentioned above, for a particular path, it may be advantageous that the impedance of the impedance matching components 834a to 834b minimizes the in-frequency noise index, maximizes the in-frequency gain, minimizes the out-of-frequency noise index, and minimizes out-of-frequency gain . The design achieves all four of these goals with only two degrees of freedom (e.g., impedance in the first frequency band and impedance in the second frequency band) or various other constraints (e.g., number of components, cost, die clearance). Impedance matching components 834a to 834b can be challenging. Therefore, in some implementations, the intra-frequency noise index minus the frequency In-frequency measurement of internal gain, and minimizing out-of-frequency noise index plus out-of-frequency measurement of out-of-frequency gain. Designing impedance matching components 834a to 834b that achieve both of these goals with various constraints may still be challenging. Therefore, in some implementations, the in-frequency metric is minimized subject to a set of constraints, and the out-of-frequency metric is minimized subject to the set of constraints and additional constraints, the additional constraint is that the in-frequency metric does not increase by a value greater than the threshold (E.g., 0.1dB, 0.2dB, 0.5dB, or any other value). Therefore, the impedance matching component is configured to reduce the intra-frequency noise index minus the intra-frequency gain to within a threshold of the lowest value of the intra-frequency measure, for example, the lowest possible intra-frequency measure subject to any constraints. The impedance matching component is further configured to reduce the out-of-frequency noise index plus out-of-frequency gain to an out-of-frequency metric with a limited out-of-frequency minimum. For example, the lowest out-of-frequency metric that is subject to additional constraints, the additional The constraint is that the in-frequency metric does not increase by a value greater than the threshold. In some implementations, the composite metric (weighted by the in-frequency factor) plus the out-of-frequency metric (weighted by the out-of-frequency factor) composite metric is minimized subject to any constraints.

Thus, in some implementations, each of the impedance matching components 834a-834b is configured to reduce the in-frequency metric (in-frequency noise index minus in-frequency gain) of its respective path (e.g., by reducing the frequency Internal noise index, increase in-frequency gain, or both). In some implementations, each of the impedance matching components 834a-834b is further configured to reduce the out-of-band metric (out-of-band noise index plus out-of-band gain) of its respective path (e.g., by reducing the out-of-band Noise index, reducing out-of-frequency gain, or both).

In some implementations, by reducing the out-of-band metric, the impedance matching components 834a to 834b reduce the noise index of the DRx module 810 in one or more of the frequency bands without substantially increasing the noise index of the other frequency bands.

FIG. 9 shows that in some embodiments, a diversity receiver configuration 900 may include a DRx module 910 with adjustable impedance matching components 934a to 934d. Each of the adjustable impedance matching components 934a to 934d may be configured to present an impedance controlled by an impedance tuning signal received from the DRx controller 902.

The diversity receiver configuration 900 includes a DRx module 910 having an input coupled to the antenna 140 and an output coupled to the transmission line 135. The DRx module 910 includes multiple paths between the input and output of the DRx module 910. In some implementations, the DRx module 910 includes one or more bypass paths (not shown) between an input and an output activated by one or more bypass switches controlled by the DRx controller 902.

The DRx module 910 includes a plurality of multiplexer paths. The multiplexer paths include an input multiplexer 311 and an output multiplexer 312. The multiplexer path includes several paths on the module (shown). The paths on these modules include the input multiplexer 311, bandpass filters 313a to 313d, adjustable impedance matching components 934a to 934d, and amplifiers 314a to 314d. , And output multiplexer 312. The multiplexer path may include one or more off-module paths (not shown) as described above. As also described above, the amplifiers 314a to 314d may be variable gain amplifiers and / or variable current amplifiers.

The adjustable impedance matching components 934a to 934b may be an adjustable T-shaped circuit, an adjustable PI circuit, or any other adjustable matching circuit. The adjustable impedance matching components 934a to 934d may include one or more variable components such as resistors, inductors, and capacitors. The variable components may be connected in parallel and / or in series and may be connected between the output of the input multiplexer 311 and the inputs of the amplifiers 314a to 314d, or may be connected between the output of the input multiplexer 311 and the ground voltage.

The DRx controller 902 is configured to selectively activate one or more of a plurality of paths between input and output. In some implementations, the DRx controller 902 is configured to selectively activate one or more of the plurality of paths based on a band selection signal received by the DRx controller 902 (eg, from a communications controller). The DRx controller 902 can selectively initiate a path, for example, by enabling or disabling amplifiers 314a to 314d, controlling multiplexers 311, 312, or via other mechanisms as described above.

In some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d. In some implementations, the DRx controller 702 tunes the adjustable impedance matching components 934a through 934d based on a band selection signal. For example, the DRx controller 902 may be based on using A lookup table associated with the frequency band (or multiple sets of frequency bands) indicated by the frequency band selection signal and tuning parameters is used to tune the adjustable impedance matching components 934a to 934d. Therefore, in response to the band selection signal, the DRx controller 902 can transmit the impedance tuning signal to the adjustable impedance matching components 934a to 934d of each active path to tune the adjustable impedance matching component (or its variable component) according to the tuning parameter. ).

In some implementations, the DRx controller 902 tunes the adjustable impedance matching components 934a to 934d based at least in part on the amplifier control signals transmitted to control the gain and / or current of the amplifiers 314a to 314d.

In some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d of each active path to minimize (or reduce) the intra-frequency noise index and maximize the intra-frequency gain (or Increase), minimize (or decrease) the out-of-frequency noise index of each other active path, and / or minimize (or decrease) the out-of-frequency gain of each other active path.

In some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d of each active path to minimize in-frequency metrics (in-frequency noise index minus in-frequency gain) (or (Reduction) and the out-of-frequency metric (out-of-frequency noise index plus out-of-frequency gain) of each other active path is minimized (or reduced).

In some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d of each active path so that the in-frequency metric is limited (or reduced) by a set of constraints, and other effects The out-of-frequency metric for each of the middle paths is minimized (or reduced) subject to the set of constraints and additional constraints such that the in-frequency metric does not increase by a value greater than the threshold (for example, 0.1dB, 0.2 dB, 0.5dB, or any other value).

Therefore, in some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d of each active path, so that the adjustable impedance matching component subtracts the in-frequency noise index from the in-frequency gain. The in-frequency metric is reduced to within the threshold of the minimum value of the in-frequency metric, for example, the smallest possible in-frequency metric subject to any constraints. DRx controller 902 Can be further configured to tune the adjustable impedance matching components 934a to 934d of each active path, so that the adjustable impedance matching component reduces the out-of-frequency noise index plus out-of-frequency gain to an out-of-frequency limitation The out-of-frequency minimum value, for example, is the smallest possible out-of-frequency metric subject to an additional constraint that the in-frequency metric does not increase by a value greater than the threshold.

In some implementations, the DRx controller 902 is configured to tune the adjustable impedance matching components 934a to 934d of each active path such that the in-frequency metric (weighted by the in-factor) is added for the other active paths The composite metric of each of the out-of-frequency metrics (weighted by the out-of-frequency factor of each of the other active paths) is minimized (or reduced) subject to any constraints.

The DRx controller 902 can tune the variable components of the adjustable impedance matching components 934a to 934d to have different values for different frequency band groups.

In some implementations, the adjustable impedance matching components 934a to 934d are replaced with fixed impedance matching components that are not adjustable or controlled by the DRx controller 902. Each of the impedance matching components placed along a counterpart in a path corresponding to one frequency band may be configured to reduce (or minimize) the in-frequency metric of that one frequency band and reduce (or minimize) the other frequency bands An out-of-band metric of one or more (e.g., each of the other frequency bands).

For example, the third impedance matching component 934c may be fixed and configured to: (1) reduce the in-frequency metric of the third frequency band; (2) decrease the out-of-frequency metric of the first frequency band; (3) reduce the second frequency band Out-of-band metrics; and / or (4) reducing out-of-band metrics for the fourth frequency band. Other impedance matching components can be fixed and configured in a similar manner.

Accordingly, the DRx module 910 includes a DRx controller 902 configured to selectively enable one or more of a plurality of paths between an input of the DRx module 910 and an output of the DRx module 910. The DRx module 910 further includes a plurality of amplifiers 314a to 314d, each of the plurality of amplifiers 314a to 314d being disposed along a corresponding one of the plurality of paths and configured to amplify a signal received at the amplifier. The DRx module further includes a plurality of impedance matching components 934a to 934d, each of the plurality of phase shifting components 934a to 934d follows a complex number A corresponding one of the paths is disposed and configured to reduce at least one of an out-of-frequency noise index or an out-of-frequency gain of the one of the plurality of paths.

In some implementations, the first impedance matching component 934a is disposed along a first path corresponding to a first frequency band (e.g., a frequency band of a first band-pass filter 313a), and is configured to reduce a second corresponding to a second path At least one of an out-of-band noise index or an out-of-band gain of a frequency band (for example, a frequency band of the second band-pass filter 313b).

In some implementations, the first impedance matching component 934a is further configured to reduce the out-of-band noise index or out-of-band gain of the third frequency band (e.g., the frequency band of the third band-pass filter 313c) corresponding to the third path. At least one of them.

Similarly, in some implementations, the second impedance matching component 934b disposed along the second path is configured to reduce at least one of the out-of-band noise index or out-of-band gain of the first frequency band.

FIG. 10 shows that in some embodiments, the diversity receiver configuration 1000 may include a DRx module 1010 with adjustable impedance matching components disposed at the input and output. The DRx module 1010 may include one or more adjustable impedance matching components disposed at one or more of the inputs and outputs of the DRx module 1010. In detail, the DRx module 1010 may include an input adjustable impedance matching component 1016 disposed at an input of the DRx module 1010, an output adjustable impedance matching component 1017 disposed at an output of the DRx module 1010, or both.

It is unlikely that multiple frequency bands received on the same diversity antenna 140 will achieve an ideal impedance match. In order to match each frequency band using a tight matching circuit, an adjustable input impedance matching component 1016 may be implemented at the input of the DRx module 1010 and controlled by the DRx controller 1002 (eg, based on a frequency band selection signal from a communication controller). For example, the DRx controller 1002 may tune the adjustable input impedance matching component 1016 based on a lookup table that associates a frequency band (or multiple sets of frequency bands) indicated by a frequency band selection signal with a tuning parameter. Therefore, in response to the band selection signal, the DRx controller 1002 can transmit the input impedance tuning signal to the adjustable input impedance matching component 1016 to tune the adjustable input impedance matching component (or its variable) according to the tuning parameter. Component).

The adjustable input impedance matching component 1016 may be an adjustable T-shaped circuit, an adjustable PI circuit, or any other adjustable matching circuit. In detail, the adjustable input impedance matching component 1016 may include one or more variable components such as resistors, inductors, and capacitors. The variable components may be connected in parallel and / or in series and may be connected between the input of the DRx module 1010 and the input of the first multiplexer 311, or may be connected between the input of the DRx module 1010 and the ground voltage.

Similarly, in the case where only one transmission line 135 (or at least very few transmission lines) carries signals of many frequency bands, it is unlikely that the multiple frequency bands will all achieve the ideal impedance matching. In order to match each frequency band using a tight matching circuit, an adjustable output impedance matching component 1017 may be implemented at the output of the DRx module 1010 and controlled by the DRx controller 1002 (eg, based on a frequency band selection signal from a communication controller). For example, the DRx controller 1002 may tune the adjustable output impedance matching component 1017 based on a lookup table that associates a frequency band (or multiple sets of frequency bands) indicated by a frequency band selection signal with a tuning parameter. Therefore, in response to the band selection signal, the DRx controller 1002 may transmit the output impedance tuning signal to the adjustable output impedance matching component 1017 to tune the adjustable output impedance matching component (or its variable component) according to the tuning parameter.

The adjustable output impedance matching component 1017 may be an adjustable T-shaped circuit, an adjustable PI circuit, or any other adjustable matching circuit. In detail, the adjustable output impedance matching component 1017 may include one or more variable components such as resistors, inductors, and capacitors. The variable components may be connected in parallel and / or in series and may be connected between the output of the second multiplexer 312 and the output of the DRx module 1010, or may be connected between the output of the second multiplexer 312 and the ground voltage.

FIG. 11 shows that in some embodiments, the diversity receiver configuration 1100 may include a DRx module 1110 with multiple adjustable components. The diversity receiver configuration 1100 includes a DRx module 1110 having an input coupled to the antenna 140 and an output coupled to the transmission line 135. The DRx module 1110 includes several paths between the input and output of the DRx module 1110. In some implementations, the DRx module 1110 includes one or more bypass paths (not shown) between inputs and outputs that are activated by one or more bypass switches controlled by the DRx controller 1102.

The DRx module 1110 includes a plurality of multiplexer paths. The multiplexer paths include an input multiplexer 311 and an output multiplexer 312. The multiplexer path includes several paths on the module (shown). The paths on these modules include: adjustable input impedance matching component 1016, input multiplexer 311, bandpass filters 313a to 313d, adjustable impedance matching Components 934a to 934d, amplifiers 314a to 314d, adjustable phase shifting components 724a to 724d, output multiplexer 312, and adjustable output impedance matching component 1017. The multiplexer path may include one or more off-module paths (not shown) as described above. As also described above, the amplifiers 314a to 314d may be variable gain amplifiers and / or variable current amplifiers.

The DRx controller 1102 is configured to selectively activate one or more of a plurality of paths between input and output. In some implementations, the DRx controller 1102 is configured to selectively activate one or more of the plurality of paths based on a band selection signal received by the DRx controller 1102 (eg, from a communication controller). The DRx controller 902 may, for example, selectively enable paths by enabling or disabling amplifiers 314a to 314d, controlling multiplexers 311, 312, or via other mechanisms as described above. In some implementations, the DRx controller 1102 is configured to send amplifier control signals to one or more amplifiers 314a to 314d respectively disposed along one or more activated paths. The amplifier control signal controls the gain (or current) of the amplifier to which it is sent.

The DRx controller 1102 is configured to tune one or more of adjustable input impedance matching components 1016, adjustable impedance matching components 934a to 934d, adjustable phase shifting components 724a to 724d, and adjustable output impedance matching components 1017. For example, the DRx controller 1102 may tune the tunable component based on a lookup table that associates a frequency band (or groups of frequency bands) indicated by a frequency band selection signal with a tuning parameter. Therefore, in response to the band selection signal, the DRx controller 1101 may transmit the tuning signal to the tunable component (of the active path) to tune the tunable component (or its variable component) according to the tuning parameter. In some implementations, the DRx controller 1102 tunes the tunable component based at least in part on an amplifier control signal transmitted to control the gain and / or current of the amplifiers 314a to 314d. In various implementations, it is possible to use a fixed that is not controlled by the DRx controller 1102 The component replaces one or more of the adjustable components.

It should be understood that the tuning of one of the tunable components may affect the tuning of the other tunable components. Therefore, the tuning parameters in the lookup table for the first tunable component may be based on the tuning parameters for the second tunable component. For example, the tuning parameters for the adjustable phase shifting components 724a to 724d may be based on the tuning parameters for the adjustable impedance matching components 934a to 934d. As another example, the tuning parameters for the adjustable impedance matching components 934a to 934d may be based on the tuning parameters for the adjustable input impedance matching component 1016.

FIG. 12 shows an embodiment represented by a flowchart of a method of processing RF signals. In some implementations (and detailed below as an example), the method 1200 is performed by a controller, such as the DRx controller 1102 in FIG. 11. In some implementations, the method 1200 is performed by processing logic including hardware, firmware, software, or a combination thereof. In some implementations, method 1200 is performed by a processor executing code stored in a non-transitory computer-readable medium (eg, memory). In brief, the method 1200 includes receiving a band selection signal and routing the received RF signal along one or more tuned paths to process the received RF signal.

Method 1200 begins at block 1210, where the controller receives a band selection signal. The controller may receive a band selection signal from another controller or may receive a band selection signal from a cellular base station or other external source. The band selection signal may indicate one or more frequency bands through which the wireless device transmits and receives RF signals. In some implementations, the band selection signal indicates a set of frequency bands used for carrier aggregation communications.

At block 1220, the controller selectively activates one or more paths of a diversity receiver (DRx) module based on the band selection signal. As described above, the DRx module may include several between one or more inputs (coupled to one or more antennas) and one or more outputs (coupled to one or more transmission lines) of the DRx module. path. The paths may include bypass paths and multiplexer paths. Multiplexer paths may include paths on the module and paths outside the module.

The controller can, for example, open or close one or more bypass switches, enable or disable amplifiers placed along the path via an amplifier enable signal, control signals via a splitter, and / Or the combiner control signal controls one or more multiplexers or selectively activates one or more of the plurality of paths via other mechanisms. For example, the controller may open or close a switch placed along the path or set the gain of the amplifier placed along the path to substantially zero.

At block 1230, the controller sends a tuning signal to one or more adjustable components positioned along one or more activated paths. The adjustable component may include an adjustable impedance matching component disposed at the input of the DRx module, a plurality of adjustable impedance matching components respectively disposed along a plurality of paths, a plurality of adjustable phase shifting components respectively disposed along a plurality of paths, or One or more of the adjustable output impedance matching components placed at the output of the DRx module.

The controller may tune the tunable component based on a lookup table associating a frequency band (or groups of frequency bands) indicated by a frequency band selection signal with a tuning parameter. Therefore, in response to the band selection signal, the DRx controller can transmit a tuning signal to the tunable component (of the active path) to tune the tunable component (or its variable component) according to the tuning parameter. In some implementations, the controller tunes the tunable component based at least in part on an amplifier control signal transmitted to control the gain and / or current of one or more amplifiers disposed along one or more activated paths, respectively.

FIG. 13 shows that in some embodiments, some or all of the diversity receiver configurations (e.g., their configurations shown in FIGS. 3 to 11) may be fully or partially implemented in a module. This module can be, for example, a front-end module (FEM). This module can be, for example, a diversity receiver (DRx) FEM. In the example of FIG. 13, the module 1300 may include a package substrate 1302, and several components may be mounted on the package substrate 1302. For example, a controller 1304 (which may include a front-end power management integrated circuit [FE-PIMC]), a low noise amplifier assembly 1306 (which may include one or more variable gain amplifiers), a matching component 1308 (which May include one or more fixed or adjustable phase shifting components 1331 and one or more fixed or adjustable impedance matching components 1332), a multiplexer assembly 1310, and a filter bank 1312 (which may include one or more bandpasses Filters) may be mounted and / or implemented on and / or within the package substrate 1302. Other components, such as several SMT devices 1314, can also be mounted on the package substrate 1302. Although all the various components are depicted as being arranged on a package substrate 1302, it should be understood that some components may be implemented on other components.

In some implementations, devices and / or circuits having one or more of the features described herein can be included in RF electronics such as wireless devices. This device and / or circuit may be directly implemented as a wireless device, in the form of a module as described herein, or in some combination thereof. In some embodiments, this wireless device may include, for example, a cellular phone, a smart phone, a handheld wireless device with or without phone functionality, a wireless tablet, and the like.

FIG. 14 depicts an example wireless device 1400 having one or more of the advantageous features described herein. In the context of one or more modules having one or more features as described herein, the diversity RF module 1411 (in general, by a dashed box 1401 (which may be implemented as, for example, a front-end module), It may be implemented as, for example, a downstream module, and a diversity receiver (DRx) module 1300 (which may be implemented as, for example, a front-end module) depicts such modules.

Referring to FIG. 14, a power amplifier (PA) 1420 may receive its respective RF signal from a transceiver 1410 that may be configured and operated in a known manner to generate RF signals to be amplified and transmitted and to process the received signals. The transceiver 1410 is shown as interacting with a base frequency subsystem 1408, which is configured to provide conversion between data and / or voice signals suitable for a user and RF signals suitable for the transceiver 1410. The transceiver 1410 may also communicate with a power management component 1406 configured to manage power for operation of the wireless device 1400. This power management component can also control the operation of the baseband subsystem 1408 and the modules 1401, 1411, and 1300.

The baseband subsystem 1408 is shown connected to the user interface 1402 to help provide various inputs and outputs of voice and / or data to and from the user. The baseband subsystem 1408 may also be connected to a memory 1404, which is configured to store data and / or instructions that facilitate the operation of the wireless device, and / or provide storage of user information.

In the example wireless device 1400, the output of the PA 1420 is shown as matched (via the respective matching circuit 1422) and routed to its respective duplexer 1424. These amplified and filtered signals may be routed via antenna switch 1414 to the main antenna 1416 for transmission. In some embodiments, the duplexer 1424 may allow a common antenna (eg, the main antenna 1416) to perform transmission and reception operations simultaneously. In Figure 14, the received signal is shown as being routed to Include, for example, the "Rx" path of a low noise amplifier (LNA).

The wireless device also includes a diversity antenna 1426 and a diversity receiver module 1300 that receives signals from the diversity antenna 1426. The diversity receiver module 1300 processes the received signals and transmits the processed signals to the diversity RF module 1411 via a transmission line 1435, which further processes the signals before feeding the signals to the transceiver 1410.

One or more features of the present invention may be implemented by various cellular bands as described herein. Examples of these frequency bands are listed in Table 1. It should be understood that at least some of these frequency bands may be divided into sub-bands. It will also be understood that one or more features of the invention may be implemented with a frequency range that does not have the name of an example such as in Table 1.

Unless the context clearly requires otherwise, throughout the specification and patent application, the word "comprises" and the like shall be interpreted in an inclusive sense, not in an exclusive or exhaustive sense; in other words, the words "including (but not limited to)" Meaning to explain. The term "coupled" as used herein refers to two or more elements that can be directly connected or connected by means of one or more intermediate elements. In addition, when used in this application, the words "herein", "above", "below" and similar meanings shall refer to the entirety of this application and not to any particular part of this application. If the context permits, the words in the above [embodiment] using the singular or plural number may also include the plural or singular number respectively. Let the word "or" for a list involving two or more items cover the interpretation of all the following words: any one of the items in the list, all the items in the list, and any combination of the items in the list .

The foregoing detailed description of the embodiments of the invention is not intended to be exhaustive or to limit the invention to the precise form disclosed above. Those skilled in the art will recognize that although specific embodiments and examples of the invention have been described above for illustrative purposes, various equivalent modifications are possible within the scope of the invention. For example, although the handlers or blocks are presented in a given order, alternative embodiments may perform routines with steps in a different order, or adopt a system with blocks, and may delete, move, add, subdivide, combine And / or modify some handlers or blocks. Each of these processes or blocks can be implemented in a number of different ways. Also, although sometimes a processing program or block is shown as being continuously executed, such processing Programs or blocks may alternatively be executed simultaneously, or may be executed at different times.

The teachings of the invention provided herein can be applied to other systems and need not be the systems described above. The elements and actions of the various embodiments described above may be combined to provide other embodiments.

Although some embodiments of the invention have been described, these embodiments have been presented by way of example only and are not intended to limit the scope of the invention. In fact, the novel methods and systems described herein may be implemented in a variety of other forms; furthermore, various omissions, substitutions, and changes may be made to the methods and systems described herein without departing from the spirit of the invention. The scope of the accompanying patent application and equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the invention.

135‧‧‧Transmission line

140‧‧‧Diversity antenna

314a‧‧‧amplifier

314b‧‧‧amplifier

600‧‧‧Diversity receiver configuration

610‧‧‧DRx Module

611‧‧‧Dual Annunciator

612‧‧‧Signal combiner

624a‧‧‧phase matching component / phase shift component

624b‧‧‧‧Phase Matching Components / Phase Shifting Components

Claims (20)

A receiving system includes a first amplifier disposed along a first path corresponding to a first frequency band and between an input of the receiving system and an output of the receiving system; and a corresponding second frequency band. A second amplifier disposed on a second path between the input of the receiving system and the output of the receiving system; and a first phase shifting component disposed along the first path and configured to enable The second frequency band phase shifting of a signal of the first phase shifting component is based on a phase shift caused by the first amplifier in the second frequency band. If the receiving system of claim 1, further comprises a second phase shifting component, the second phase shifting component is disposed along the second path and configured to pass the first phase shifting signal of the second phase shifting component. A frequency band phase shift is based on a phase shift caused by the second amplifier in the first frequency band. The receiving system of claim 1, wherein the first phase shifting component is further configured to phase shift a third frequency band of the signal passing through the first phase shifting component, which is based on the third frequency band, A phase shift caused by the first amplifier. The receiving system as claimed in claim 1, wherein the first phase shifting component is configured to phase shift the second frequency band of the signal passing through the first phase shifting component, which is based on passing through the first amplifier A phase shift caused by the reverse propagation and the forward propagation through the first amplifier. If the receiving system of claim 1 further comprises a multiplexer, the multiplexer is configured to separate an input signal received at the input of the receiving system into a first frequency band along the first path. A first signal and a second signal propagating along the second path in a second frequency band. The receiving system of claim 5, wherein the first phase shifting component is configured to pass through the The second frequency band phase shift of the signal of the first phase shift component is further based on a phase shift caused by the multiplexer in the second frequency band. The receiving system according to claim 5, wherein the first phase shifting component is integrated into a first impedance matching component disposed between the multiplexer and the first amplifier. The receiving system of claim 7, wherein the first impedance matching component has an impedance selected based on the first frequency band to reduce a noise index of the first path for the first frequency band or for the first frequency band. At least one of the gains of the first path. The receiving system as claimed in claim 8, wherein the first impedance matching component has an impedance selected based on the second frequency band to reduce a noise index of the first path for the second frequency band or for the second frequency band. At least one of the gains of one of the first paths. If the receiving system of claim 5 further comprises a signal combiner, the signal combiner is configured to combine the first signal and the second signal. The receiving system of claim 10, wherein the first phase shifting component is disposed between the signal combiner and the first amplifier. The receiving system as claimed in claim 1, wherein the first phase shifting component is configured to phase shift the second frequency band of the signal passing through the first phase shifting component so that an initial propagation along the second path The signal and a reflected signal traveling along the first path are at least partially in-phase. The receiving system of claim 12, wherein the first phase shifting component is configured to phase shift the second frequency band of the signal passing through the first phase shifting component such that one of the initial signal and the reflected signal An amplitude of the sum is greater than an amplitude of the initial signal. The receiving system of claim 12, wherein the first phase shifting component is configured to phase shift the second frequency band of the signal passing through the first phase shifting component, so that the initial signal and the reflected signal have A phase difference of an integer multiple of 360 degrees. The receiving system of claim 1, wherein the first phase-shifting component is an adjustable phase-shifting component, which is configured to phase-shift the second frequency band of the signal passing through the first phase-shifting component. The controller receives an amount controlled by a phase-shifted tuning signal. The receiving system of claim 1, wherein the first phase shifting component is a passive circuit. A radio frequency (RF) module includes: a packaging substrate configured to receive a plurality of components; and a receiving system implemented on the packaging substrate. The receiving system includes: A first amplifier disposed along a first path between an input of the receiving system and an output of the receiving system along a frequency band corresponding to a second frequency band at the input of the receiving system and the receiving system; A second amplifier is disposed on a second path between the outputs, and a first phase shifting component is disposed along the first path and configured to pass the signal of a signal passing through the first phase shifting component. The second frequency band phase shift is based on a phase shift caused by the first amplifier in the second frequency band. For example, the RF module of claim 17, wherein the RF module is a branch receiver front-end module. A wireless device includes: a first antenna configured to receive a first radio frequency (RF) signal; a first front-end module (FEM) that communicates with the first antenna; the first The FEM includes a package substrate configured to receive one of a plurality of components. The first FEM further includes a receiving system implemented on the package substrate. The receiving system includes: A first amplifier is disposed along a first path between an input and an output of the receiving system, along a first band corresponding to a second frequency band, between the input of the receiving system and the output of the receiving system. A second amplifier disposed in two paths, and a first phase shifting component disposed along the first path and configured to pass the second signal passing through one of the first phase shifting components. Band shifting based on a phase shift caused by the first amplifier in the second frequency band; and a transceiver configured to output from one of the first FEM modules via a transmission line Receiving a processed version of the first RF signal and generating a data bit based on the processed version of the first RF signal. If the wireless device of claim 19, further comprising a second antenna configured to receive a second radio frequency (RF) signal and a second FEM in communication with the second antenna, the transceiver is configured to A processed version of the second RF signal is received from an output of the second FEM, and the data bits are generated based on the processed version of the second RF signal.