CN102404021A - Duplex amplifying module, radio frequency front end module and multi-mode terminal - Google Patents

Abstract

The present invention provides a duplex amplifying module, a multi-mode terminal, a radio frequency front-end module, a multi-mode radio frequency transceiver chip and a method for sending signals by a multi-mode terminal, the duplex amplifying module includes a power amplifier and a duplexer, wherein: the The power amplifier is used to amplify the signal of any one of the at least two frequency bands of various input mode signals and output it to the duplexer; the duplexer is used to output the amplified signal from the power amplifier and/or, output the signal of any frequency band in at least two frequency bands of the received signals of various modes after filtering. The above-mentioned duplex amplifying module and the multi-mode terminal including the duplex amplifying module simplify the radio frequency transmitting and receiving circuit, greatly increase the integration degree of the multi-mode terminal, thereby reducing the occupied PCB area.

Description

Duplex amplifier module, RF front-end module and multi-mode terminal

technical field

The invention relates to mobile communication technology, in particular to a duplex amplifying module, a multi-mode terminal, a radio frequency front-end module, a multi-mode radio frequency transceiver chip and a method for sending signals by the multi-mode terminal.

Background technique

In the current mobile phone communication system, the radio frequency front end of the mobile phone terminal is the key device for realizing signal transmission and reception. With the development of third-generation mobile communication technology (3G) and long-term evolution technology (LTE), telecom operators currently use multiple different standards, and the modes and frequency bands of each system are also different. The mainstream standards mainly include global mobile communications. System (Global System for Mobile Communication, GSM), code division multiple access system (Code Division Multiple Access, CDMA), wideband code division multiple access system (Wideband Code Division Multiple Access, WCDMA), time division synchronous code division multiple access system (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA), CDMA2000 and LTE.

Traditional GSM/WCDMA dual-mode terminals include main antenna, antenna matching, antenna switch module, duplexer, radio frequency amplifier (RFPA), surface acoustic filter (SAW), radio frequency transceiver chip, etc. The receiving behavior of WCDMA and GSM is carried out separately. The receiving behavior of the GSM system is to receive the signal through the GSM main antenna through the matching circuit to the antenna switch module module, and then pass through the filter SAW to the radio frequency transceiver chip (transceiver) for signal processing. The GSM system The transmission behavior of the WCDMA system is to send the signal to the radio frequency amplifier (RFPA) through the radio frequency transceiver chip (transceiver) to amplify it and transmit it to the GSM main antenna through the antenna switch module and the matching circuit; while the reception behavior of the WCDMA system is to receive the signal from the WCDMA main antenna through matching From the circuit to the antenna switch module, to the duplexer, then to the receiving circuit, and then to the RF transceiver chip (transceiver) for signal processing, the transmission behavior of the WCDMA system is from the RF transceiver chip (transceiver) output signal to the duplexer, and then to the antenna switch module , Matching is transmitted by the WCDMA main antenna. The GSM main antenna and the WCDMA main antenna here can be synthesized into one, or can be designed separately, and the radio frequency transceiver chips (transceivers) of WCDMA and GSM can be synthesized or independent.

As shown in Figure 1, it is a schematic diagram of the architecture of an existing GSM/WCDMA dual-mode terminal, wherein the receiving behavior of the WCDMA frequency band (band) 1 system is to receive signals through the main antenna 101, and then to the duplexer 107 via the antenna switch module 102 Then enter the radio frequency transceiver chip 113 in the receiving path; the receiving behavior of the WCDMA band1 system is transmitted by the radio frequency transceiver chip 113 and output to the radio frequency amplifier 110, after the signal is amplified, it enters the duplexer 107 and enters the antenna switch module 102 to be transmitted by the main antenna 101 The GSM high-frequency system is launched by the radio frequency transceiver chip 113 to input the GSM high-frequency signal to the radio frequency amplifier 105 of the corresponding frequency band and then transmits by the main antenna 101 through the antenna switch module 102, and the GSM high-frequency system receives the channel received by the main antenna 101 The transmission to the antenna switch module 102 is filtered by the surface acoustic filter 103 and then reaches the radio frequency transceiver chip 113 . The work of WCDMA and GSM transceiver systems in other frequency bands is similar to the above description.

For the design of mobile phones, especially the design of RF front-end modules, the complexity is increasing, which also requires higher and higher integration of the design. However, the existing RF front-end architecture design is still relatively complex, and further integration and simplification is the key inevitable trend.

Contents of the invention

An embodiment of the present invention provides a duplex amplifier module, a radio frequency front-end module, a multi-mode terminal, a multi-mode radio frequency transceiver chip and a method for sending signals by a multi-mode terminal, so as to solve the problem that the existing multi-mode terminal has high complexity and low integration low problem.

An embodiment of the present invention provides a duplex amplification module, which is applied to a transceiver channel of a multi-mode terminal. The duplex amplification module includes a power amplifier and a duplexer, wherein:

The power amplifier is used to amplify the signal of any one of the at least two frequency bands of the input signals of various modes before outputting to the duplexer;

The duplexer is used to output the amplified signal from the power amplifier; and/or to filter the signal of any one of the at least two frequency bands of the received signals of various modes before outputting.

Preferably, the power amplifier is used to amplify signals in any one of at least two frequency bands of the low-frequency transmission signals of various modes of signals input and output them to the duplexer.

Preferably, the duplexer includes a transmit filter and a receive filter, wherein:

The transmit filter is connected to the power amplifier and is used to output the amplified low-frequency transmit signal from the power amplifier;

The receiving filter is used to filter the signal of any one of the at least two frequency bands of the received low-frequency reception signals of various mode signals and output it.

Preferably, the power amplifier is used to amplify signals in any one of at least two frequency bands of the high-frequency transmission signals of various modes of signals input and output them to the duplexer.

Preferably, the duplexer includes a transmit filter and a receive filter, wherein:

The transmit filter is connected to the power amplifier and is used to output a high-frequency transmit signal amplified by the power amplifier;

The receiving filter is used to filter the signal of any one of the at least two frequency bands of the received high-frequency receiving signals of various mode signals and output it.

Preferably, the various mode signals include Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) signals and Global System for Mobile Communications (GSM) signals .

The embodiment of the present invention also provides a radio frequency front-end module, including an antenna switch module, and also includes the above-mentioned duplex amplifying module and/or the above-mentioned duplex amplifying module connected to the antenna switch module; or, with the above-mentioned The above-mentioned duplex amplification module connected to the above-mentioned antenna switch module.

An embodiment of the present invention provides a multi-mode radio frequency transceiver chip, the multi-mode radio frequency transceiver chip includes:

The separation module is used to divide various mode signals into low-frequency transmission signals or high-frequency transmission signals;

An output module, configured to output the low-frequency transmission signal or the high-frequency transmission signal divided by the separation module.

An embodiment of the present invention provides a multi-mode terminal, including a multi-mode radio frequency transceiver chip, a duplex amplifier module, and an antenna switch module connected in sequence, wherein:

The duplex amplifying module adopts the above-mentioned low-frequency duplex amplifying module and/or the above-mentioned high-frequency duplex amplifying module;

The multi-mode radio frequency transceiver chip adopts the above-mentioned multi-mode radio frequency transceiver chip.

An embodiment of the present invention provides a multi-mode terminal, including a multi-mode radio frequency transceiver chip, a duplex amplifier module, and an antenna switch module connected in sequence, and the terminal module also includes a switch module,

The duplex amplifying module adopts the above-mentioned low-frequency duplex amplifying module and/or the above-mentioned high-frequency duplex amplifying module;

The switch module is configured to switch the low-frequency transmission signal or the high-frequency transmission signal sent by the multi-mode radio frequency transceiver chip to the corresponding duplex amplification module; and/or, switch the low-frequency reception signal output by the duplex amplification module Or the high-frequency receiving signal is switched to the dual-mode radio frequency transceiver chip.

The embodiment of the present invention also provides a method for a multi-mode terminal to send a signal, the method comprising:

The multi-mode radio frequency transceiver chip divides the various mode signals to be sent into low-frequency transmission signals or high-frequency transmission signals for output;

The power amplification module amplifies the input low-frequency transmission signal or high-frequency transmission signal and then outputs it.

The embodiment of the present invention also provides a method for a multi-mode terminal to send a signal, the method comprising:

The switch module switches the low-frequency transmission signals or high-frequency transmission signals of various mode signals sent by the multi-mode radio frequency transceiver chip to the corresponding power amplification module;

The power amplification module amplifies the input signal and then outputs it.

The above-mentioned duplex amplifier module and the multi-mode terminal including the duplex amplifier module combine radio frequency amplifiers of different standards in similar frequency bands and corresponding duplexers to synthesize a duplex amplifier module, and the radio frequency transceiver chip is improved to be able to process signals of various standards, and According to the frequency band, it is synthesized into high and low frequency four-way input and output, realizes the transmission and reception of radio frequency signals, reduces a large number of components, and improves the integration degree of multi-mode terminals.

Description of drawings

Fig. 1 is the structural diagram of existing GSM/WCDMA dual-mode terminal;

FIG. 2 is a schematic diagram of the architecture of Embodiment 1 of the GSM/WCDMA dual-mode terminal of the present invention;

FIG. 3 is a schematic diagram of the architecture of Embodiment 2 of the GSM/WCDMA dual-mode terminal of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

An embodiment of the present invention provides a duplex amplification module, which is applied to a transceiver channel of a multi-mode terminal. The duplex amplification module includes a power amplifier and a duplexer, wherein:

The power amplifier is used to amplify the signal of any one of the at least two frequency bands of the input signals of various modes before outputting to the duplexer;

The duplexer is used to output the amplified signal from the power amplifier; and/or to filter the signal of any one of the at least two frequency bands of the received signals of various modes before outputting.

Wherein, the above-mentioned duplex amplifying module may be a low-frequency duplex amplifying module, specifically, the power amplifier is used to amplify signals in any one of at least two frequency bands of the low-frequency transmission signals of various input modes output to the duplexer. The duplexer includes a transmit filter and a receive filter, wherein: the transmit filter is connected to the power amplifier for outputting the amplified low-frequency transmit signal from the power amplifier; the receive filter, It is used for filtering the signal of any frequency band in the at least two frequency bands of the received low-frequency reception signal of various mode signals and outputting it.

In addition, the above-mentioned duplex amplifying module may be a high-frequency duplex amplifying module, specifically, the power amplifier is a signal of any one of at least two frequency bands used for high-frequency transmission of signals of various input modes After being amplified, it is output to the duplexer. The duplexer includes a transmit filter and a receive filter, wherein: the transmit filter is connected to the power amplifier for outputting a high-frequency transmit signal amplified from the power amplifier; the receive filter , for outputting after filtering the signal of any one of the at least two frequency bands of the received high-frequency reception signals of various mode signals.

Further, the above-mentioned various mode signals include Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) signals and Global System for Mobile Communications (GSM) signals.

When the above mode signals are GSM signals and WCDMA signals, the frequency band division of the two signals is shown in Table 1:

Table 1 Correspondence between WCDMA frequency band and GSM frequency band working frequency

In order to improve the integration level, the transmitting radio frequency amplifier (RFPA) and the duplexer (duplexer) are integrated into a duplex amplifier module for each high and low frequency. From the above GSM and WCDMA transmit and receive frequency bands, it can be seen that the low frequency duplex amplifier module only needs to cover 824 -915MHz, and the high-frequency duplex amplifier module can cover most standard transmission frequency bands as long as it covers 1710-1980MHz, and the standard frequency bands that are not covered are rarely used by operators. The multi-band multi-mode of the duplexer is adjustable, and it can be realized by switching different internal band-pass filters through electric switches.

It should be noted that the low-frequency transmission signal or high-frequency transmission signal of a certain mode in the embodiment of the present invention includes at least two frequency band signals of the mode. The so-called low-frequency transmission signal and high-frequency transmission signal are a relative concept, that is, The frequency points covered by low-frequency transmission signals are lower than those covered by high-frequency transmission signals. For example, for GSM/WCDMA signals, the frequency band covered by low-frequency transmission signals is 824-915MHz; the frequency band covered by high-frequency transmission signals is 1710MHz. -1980MHz.

Certainly, the above-mentioned duplex amplifying module can have the function of a low-frequency and high-frequency duplex amplifying module, and the above-mentioned duplex amplifying module can be integrated with an antenna switch module to form a radio frequency front-end module, and the duplex amplifying module is connected to the antenna switch module.

In order to realize the functions of the above-mentioned low-frequency and high-frequency duplex amplifying modules, an embodiment of the present invention provides a multi-mode radio frequency transceiver chip, the multi-mode radio frequency transceiver chip includes: a separation module for dividing various mode signals into low-frequency transmission signals or a high-frequency transmission signal; an output module, configured to output the low-frequency transmission signal or the high-frequency transmission signal divided by the separating module. The multi-mode radio frequency transceiver chip also includes: an input module for inputting low-frequency receiving signals or high-frequency receiving signals of various mode signals. The above-mentioned multi-mode radio frequency transceiver chip synthesizes multiple channels of transmission and reception into four input and output channels of high and low frequency receiving and transmitting. Such a structure greatly simplifies the radio frequency circuit of multi-standard mobile phone terminals.

As shown in Figure 2, it is a schematic diagram of the structure of the first embodiment of the GSM/WCDMA dual-mode terminal of the present invention. The dual-mode terminal in this embodiment includes a main antenna 201, an antenna switch module 202, switch modules 209-212, high-frequency dual Industrial amplifier module 203, low-frequency duplex amplifier module 204 and multi-mode radio frequency transceiver chip 213; Compared with traditional WCDMA/GSM mobile phone terminals, multiple surface acoustic filters and radio frequency amplifiers are omitted, and multiple amplifiers of different formats follow the The frequency bands are synthesized into two radio frequency amplifiers, that is, a high frequency broadband radio frequency amplifier 207 and a low frequency broadband radio frequency amplifier 208, and are synthesized with adjustable duplexers 205 and 206 respectively into a module, namely a high frequency duplex amplifier module 203 and a low frequency duplex amplifier Module 204. Different switch modules 209 , 210 , 211 , 212 are used between the low-frequency and high-frequency duplex amplifier modules and the traditional radio frequency transceiver chip 213 to switch the transmission and reception paths of different frequency bands and standards. For example, the transmission of WCDMA band1 is to transmit the signal through the radio frequency transceiver chip 213, the switch module 209 controls and switches the high-frequency duplex amplifier module 203 to connect with the WCDMA HB1TX channel, and the signal reaches the antenna switch module after being amplified by the high-frequency duplex amplifier module 203 202, finally transmitted by the main antenna 201; reception is through the main antenna 201 to receive the signal to the antenna switch module 202 to the high-frequency duplex amplifier module 203 for filtering, the switch module 209 controls to switch on the high-frequency duplex amplifier module 203 With the WCDMA HB1 RX receiving path of the radio frequency transceiver chip 213, the signal reaches the radio frequency transceiver chip 213. The sending and receiving behaviors of WCDMA signals and GSM signals in other frequency bands are also similar to the above description.

To sum up, the transmission and reception behavior of WCDMA and GSM signals are synthesized when passing through the duplexer and RF amplifier module, that is, the GSM transmission and reception signals that do not pass through the duplexer are combined with WCDMA in the improved RF front-end architecture of WCDMA mobile phone terminals. Also through the duplex amplifier module, the switching of signal transmission and reception when WCDMA and GSM are working in different systems is carried out through the switching behavior of the switch module between the antenna switch module and the duplex amplifier module.

In addition, the above-mentioned high-frequency duplex amplifier module and low-frequency duplex amplifier module can be completed by one duplex amplifier module, but at this time the power amplifier in the duplex amplifier module has a wider operating frequency range, and the transmit filter in the duplexer And the operating frequency range of the receiving filter is also wider. There are many ways to adjust the working frequency of the power amplifier, such as adjusting by adding a matching circuit; and there are many ways to adjust the working frequency of the transmitting filter and receiving filter in the duplexer. The method is to set the capacitors in the high and low pass filters in the transmitting filter and the receiving filter as adjustable capacitors, and change the operating frequency of the transmitting filter and the receiving filter by adjusting the capacitance value of the adjustable capacitors.

As shown in Figure 3, it is a schematic diagram of the structure of the second embodiment of the GSM/WCDMA dual-mode terminal of the present invention. The dual-mode terminal in this embodiment includes a main antenna 301, an antenna switch module 302, a high-frequency duplex amplifier module 303, a low-frequency Duplex amplifier module 304 and multimode radio frequency transceiver chip 309; Compared with the dual-mode terminal shown in Figure 2, the switch module is omitted, the radio frequency transceiver chip integrates WCDMA, GSM transceiver, and WCDMA, GSM transceiver integrated into a high, Two channels of transceiver input and output for low frequency. At the same time, the multi-mode RF transceiver chip also integrates similar frequency bands of different standards into two channels of transceiver input and output in high and low frequency bands. Specifically, compared with the dual-mode terminal shown in FIG. 2, the receiving and transmitting behavior saves the switching behavior of the switch module for different transmitting and receiving channels. The radio frequency transceiver chip 309 has only four input and output channels, and the signal transmission is directly through the radio frequency transceiver chip 309. and the control of the antenna switch module 302 can be completed. For example, the transmission of WCDMA band1 is to transmit the signal through the radio frequency transceiver chip 309. After the signal is amplified by the switching high-frequency duplex amplifier module 303, it reaches the antenna switch module 302 and is transmitted by the main antenna 301. The reception is through the main antenna 301. Receive the signal to the After filtering from the antenna switch module 302 to the high-frequency duplex amplifier module 303 , the receiving path transmits the signal to the radio frequency transceiver chip 309 . The sending and receiving behaviors of WCDMA signals and GSM signals in other frequency bands are also similar to the above description.

To sum up, the transmission and reception behavior of WCDMA and GSM signals are synthesized when they pass through the low-frequency and high-frequency duplex amplifier modules, that is, the GSM transmission and reception signals that do not pass through the duplexer are in the improved WCDMA mobile phone terminal RF front-end architecture. Like WCDMA, through the duplex amplifier module, the switching of signal transmission and reception when WCDMA and GSM are working in different systems is carried out through the switching behavior of the antenna switch module and the radio frequency transceiver chip. The high-frequency and low-frequency duplex amplification modules can be independent of each other, or can be integrated in one chip.

The above-mentioned WCDMA/GSM mode is not limited to WCDMA and GSM mobile phone terminals, it can also be CDMA/GSM mode, etc. The duplex amplifier module can be one for high and low frequency, or can be synthesized into one chip; it can also be combined with the antenna switch module Combined into a radio frequency front-end module.

The above-mentioned multi-mode terminal transmits and receives signals of different modes through the low-frequency and high-frequency duplex amplifier modules, which simplifies the radio frequency transceiver circuit, greatly increases the integration of the multi-mode terminal, thereby reducing the occupied PCB area.

Those skilled in the art can understand that all or part of the steps in the above method can be completed by instructing related hardware through a program, and the above program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk, and the like. Optionally, all or part of the steps in the foregoing embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software function modules. The present invention is not limited to any specific combination of hardware and software.

The above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them, and the present invention is described in detail with reference to preferred embodiments. Those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all should be covered by the claims of the present invention.

Claims (12)

1. A duplex amplifying module, which is applied to the transceiver channel of a multimode terminal, is characterized in that, the duplex amplifying module includes a power amplifier and a duplexer, wherein: The power amplifier is used to amplify the signal of any one of the at least two frequency bands of the input signals of various modes before outputting to the duplexer; The duplexer is used to output the amplified signal from the power amplifier; and/or to filter the signal of any one of the at least two frequency bands of the received signals of various modes before outputting. 2. The duplex amplifier module according to claim 1, characterized in that: The power amplifier is used to amplify the signals of any one of the at least two frequency bands of the low-frequency transmission signals of the input signals of various modes, and then output them to the duplexer. 3. The duplex amplification module according to claim 2, characterized in that: The duplexer includes a transmit filter and a receive filter, wherein: The transmit filter is connected to the power amplifier and is used to output the amplified low-frequency transmit signal from the power amplifier; The receiving filter is used to filter the signal of any one of the at least two frequency bands of the received low-frequency reception signals of various mode signals and output it. 4. The duplex amplification module according to claim 1, characterized in that: The power amplifier is used to amplify the signal of any one of the at least two frequency bands of the high-frequency transmission signals of the input signals of various modes, and then output the signal to the duplexer. 5. The duplex amplification module according to claim 4, characterized in that: The duplexer includes a transmit filter and a receive filter, wherein: The transmit filter is connected to the power amplifier and is used to output a high-frequency transmit signal amplified by the power amplifier; The receiving filter is used to filter the signal of any one of the at least two frequency bands of the received high-frequency receiving signals of various mode signals and output it. 6. The duplex amplification module according to any one of claims 1-5, characterized in that: The various mode signals include Wideband Code Division Multiple Access (WCDMA) signals, Code Division Multiple Access (CDMA) signals, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) signals and Global System for Mobile Communications (GSM) signals. 7. A radio frequency front-end module, comprising an antenna switch module, characterized in that it also includes a duplex amplifier module as claimed in claim 2 or 3 connected to the antenna switch module and/or as claimed in claim 4 or The duplex amplifying module described in 5; or, the duplex amplifying module as claimed in claim 1 connected with the antenna switch module. 8. A multimode radio frequency transceiver chip, characterized in that the multimode radio frequency transceiver chip comprises: The separation module is used to divide various mode signals into low-frequency transmission signals or high-frequency transmission signals; An output module, configured to output the low-frequency transmission signal or the high-frequency transmission signal divided by the separation module. 9. A multimode terminal, comprising a multimode radio frequency transceiver chip, a duplex amplifier module and an antenna switch module connected in sequence, is characterized in that: The duplex amplifying module adopts the duplex amplifying module as claimed in claim 2 or 3 and/or the duplex amplifying module as described in claim 4 or 5; The multi-mode radio frequency transceiver chip adopts the multi-mode radio frequency transceiver chip as claimed in claim 8 . 10. A multi-mode terminal, comprising sequentially connected multi-mode radio frequency transceiver chips, duplex amplifier modules and antenna switch modules, characterized in that the terminal module also includes a switch module, The duplex amplifying module adopts the duplex amplifying module as claimed in claim 2 or 3 and/or the duplex amplifying module as described in claim 4 or 5; The switch module is configured to switch the low-frequency transmission signal or the high-frequency transmission signal sent by the multi-mode radio frequency transceiver chip to the corresponding duplex amplification module; and/or, switch the low-frequency reception signal output by the duplex amplification module Or the high-frequency receiving signal is switched to the dual-mode radio frequency transceiver chip. 11. A method for sending signals by a multimode terminal, characterized in that the method comprises: The multi-mode radio frequency transceiver chip divides the various mode signals to be sent into low-frequency transmission signals or high-frequency transmission signals for output; The power amplification module amplifies the input low-frequency transmission signal or high-frequency transmission signal and then outputs it. 12. A method for sending signals by a multimode terminal, characterized in that the method comprises: The switch module switches the low-frequency transmission signals or high-frequency transmission signals of various mode signals sent by the multi-mode radio frequency transceiver chip to the corresponding power amplification module; The power amplifying module amplifies the input signal and then outputs it.

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