CN115498399B - Antenna Assemblies, Electronic Devices and Wearable Devices - Google Patents
Antenna Assemblies, Electronic Devices and Wearable Devices Download PDFInfo
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- CN115498399B CN115498399B CN202110681147.1A CN202110681147A CN115498399B CN 115498399 B CN115498399 B CN 115498399B CN 202110681147 A CN202110681147 A CN 202110681147A CN 115498399 B CN115498399 B CN 115498399B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
本申请涉及一种天线组件、电子设备和可穿戴设备，天线组件包括：第一辐射体，用于辐射第一通信制式的第一射频信号；第二辐射体，设有馈电点；射频处理电路，与馈电点连接，用于向馈电点馈入激励信号，以使第二辐射体辐射第二通信制式的第二射频信号；阻抗电路，与射频处理电路连接，用于提供预设阻抗，以将射频处理电路上产生的阻抗和预设阻抗的总阻抗稳定在预设范围内，可以保证射频处理电路在对第二射频信号进行处理(例如，频段之间的切换处理)时，可以将阻抗电路和射频处理电路在第一射频信号的通信频段内的产生的总阻抗值稳定在预设范围内，可以在辐射第一射频信号和第二射频信号的同时，确保第一射频信号辐射的稳定性，以提高辐射性能。
The present application relates to an antenna assembly, an electronic device and a wearable device, wherein the antenna assembly comprises: a first radiator, for radiating a first radio frequency signal of a first communication standard; a second radiator, provided with a feeding point; a radio frequency processing circuit, connected to the feeding point, for feeding an excitation signal into the feeding point, so that the second radiator radiates a second radio frequency signal of a second communication standard; an impedance circuit, connected to the radio frequency processing circuit, for providing a preset impedance, so as to stabilize the total impedance of the impedance generated on the radio frequency processing circuit and the preset impedance within a preset range, so as to ensure that when the radio frequency processing circuit processes the second radio frequency signal (for example, switching between frequency bands), the total impedance value generated by the impedance circuit and the radio frequency processing circuit within the communication frequency band of the first radio frequency signal can be stabilized within a preset range, so that the stability of the radiation of the first radio frequency signal can be ensured while radiating the first radio frequency signal and the second radio frequency signal, so as to improve the radiation performance.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to an antenna assembly, an electronic device, and a wearable device.
Background
With the development of wireless communication technology, users have increasingly demanded portability and appearance of electronic devices. An antenna of an electronic device having a metal bezel is mainly implemented based on the metal bezel. Electronic devices are typically provided with multiple antennas (e.g., a GPS antenna and an LTE antenna) for radiating radio frequency signals of different communication systems. But when one of the antennas works, the radiation performance of the other antenna is affected, for example, the radiation performance of the GPS antenna for radiating GPS signals is affected in the working process of the LTE antenna.
Disclosure of Invention
The embodiment of the application provides an antenna assembly, electronic equipment and wearable equipment, which can radiate a first radio frequency signal and a second radio frequency signal and simultaneously ensure the radiation stability of the first radio frequency signal so as to improve the radiation performance of the first radio frequency signal.
In a first aspect, an embodiment of the present application provides an antenna assembly, including:
the first radiator is used for radiating a first radio frequency signal of a first communication system;
A second radiator provided with a feeding point;
the radio frequency processing circuit is connected with the feed point and is used for feeding an excitation signal to the feed point so that the second radiator radiates a second radio frequency signal of a second communication system;
And the impedance circuit is connected with the radio frequency processing circuit and used for providing preset impedance so as to stabilize the impedance generated on the radio frequency processing circuit and the total impedance of the preset impedance within a preset range, wherein the frequency range of the first radio frequency signal is different from that of the second radio frequency signal.
In a second aspect, an embodiment of the present application provides an electronic device, including:
the antenna assembly;
the first radiator and the second radiator are formed on the conductive frame;
The substrate is accommodated in a cavity formed by enclosing the conductive frame, and the radio frequency processing circuit and the impedance circuit are arranged on the substrate.
In a third aspect, an embodiment of the present application provides a wearable device, including:
A strap assembly;
in the electronic device, the strap assembly is used for wearing the electronic device at a wearing position of a user.
The antenna assembly, the electronic device and the wearable device comprise a first radiator, a second radiator, a radio frequency processing circuit and an impedance circuit, wherein the first radiator is used for radiating a first radio frequency signal of a first communication system, the second radiator is provided with a feeding point, the radio frequency processing circuit is connected with the feeding point and used for feeding an excitation signal into the feeding point so that the second radiator radiates a second radio frequency signal of the second communication system, and the impedance circuit is connected with the radio frequency processing circuit and used for providing preset impedance so as to stabilize the impedance generated on the radio frequency processing circuit and the total impedance of the preset impedance within a preset range. Therefore, when the radio frequency processing circuit processes the second radio frequency signal (for example, switching processing between frequency bands), the total impedance value generated by the impedance circuit and the radio frequency processing circuit in the communication frequency band of the first radio frequency signal can be stabilized within a preset range, so that the performance variation degree of the first radio frequency signal, which is caused when the radio frequency processing circuit processes the second radio frequency signal, is reduced, and the radiation stability of the first radio frequency signal can be improved during the processing of the second radio frequency signal (for example, switching of different frequency bands to realize network searching), so that the radiation performance of the first radio frequency signal is improved, and the communication performance of the antenna assembly is further improved.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a wearable device in one embodiment;
FIG. 2 is a schematic diagram of a first structure of an antenna assembly according to an embodiment;
FIG. 3 is a schematic diagram of an antenna assembly impedance circuit and a radio frequency processing circuit according to an embodiment;
FIG. 4 is a schematic diagram of an antenna assembly impedance circuit and a radio frequency processing circuit according to another embodiment;
FIG. 5 is a schematic diagram of an antenna assembly impedance circuit and a radio frequency processing circuit according to another embodiment;
FIG. 6 is a schematic diagram of an antenna assembly impedance circuit and a radio frequency processing circuit according to another embodiment;
FIG. 7 is a graph showing the impedance change during switching of the switch unit according to one embodiment;
FIG. 8 is a schematic diagram of an impedance circuit according to an embodiment;
FIG. 9 is a schematic circuit diagram of an impedance circuit in another embodiment;
FIG. 10 is a schematic diagram of an antenna assembly according to another embodiment;
FIG. 11 is a schematic diagram of an impedance circuit according to another embodiment;
FIG. 12 is a schematic circuit diagram of an impedance circuit in yet another embodiment;
FIG. 13 is a schematic diagram of an antenna assembly according to another embodiment;
FIG. 14 is a schematic diagram of an antenna assembly according to another embodiment;
Fig. 15 is a schematic diagram of a frame structure of a wearable device in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element and should not be construed as indicating or implying a relative importance or number of technical features indicated. For example, a first radiator may be referred to as a second radiator, and similarly, a second radiator may be referred to as a first radiator, without departing from the scope of the application. Both the first and second radiators are light emitting components, but they are not the same light emitting component.
Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be understood that when an element is referred to as being "engaged" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Please refer to fig. 1 and fig. 2 together. Fig. 1 is a schematic perspective view of a wearable device according to an embodiment of the application, and fig. 2 is a schematic first structural view of an antenna assembly according to an embodiment of the application. As shown in fig. 1, in one embodiment, the wearable device 10 includes an electronic device 100 and a strap assembly 200, the electronic device 100 being mounted to the strap assembly 200 and capable of being worn to a wrist of a user by the strap assembly 200, i.e., the strap assembly 200 is capable of wearing the electronic device 100 in a wearing position of the user, e.g., a wrist, ankle, head, etc. In one embodiment, the wearable device 10 is a smart watch, smart bracelet, pedometer, or the like.
As shown in fig. 2, the electronic device 100 includes a conductive bezel 110, a back cover, a display screen assembly, a substrate 120, and radio frequency circuitry. The display assembly 120 is fixed on a housing assembly formed by the conductive frame 110 and the rear cover, the display assembly 120 and the housing assembly together form an external structure of the electronic device 10, and the display assembly 120 can be used for displaying pictures or fonts and can provide an operation interface for a user.
In one embodiment, the conductive frame 110 may be a frame structure with a through hole. The conductive frame 110 may be made of metal frames such as aluminum alloy and magnesium alloy.
In one embodiment, the conductive frame 110 is a rounded rectangular frame, where the conductive frame 110 may include a first frame and a third frame disposed opposite to each other, and a second frame and a fourth frame disposed opposite to each other, where the second frame is connected to the first frame and the third frame, respectively. The first frame may be understood as a top frame of the electronic device 100, the third frame may be understood as a bottom frame of the electronic device 100, and the second and fourth frames may be understood as side frames of the electronic device 100.
The antenna assembly may be formed partially or entirely of a portion of the conductive bezel 110 of the electronic device 100. Illustratively, the radiator of the antenna assembly may be partially or integrally formed with at least one of the top bezel, the bottom bezel, and the side bezel of the electronic device 100.
The substrate 120 may be accommodated in an accommodating space formed by the conductive bezel 110 and the rear cover. The substrate 120 may be a PCB (Printed Circuit Board ) or an FPC (Flexible Printed Circuit, flexible circuit board). On the substrate 120, a part of radio frequency circuits for processing radio frequency signals may be integrated, and a controller or the like capable of controlling the operation of the electronic device 100 may be integrated.
In one embodiment, the sides of the conductive bezel 110 may be provided with mating structures for mounting the strap assembly 200, and the strap assembly 200 may be capable of forming a secure connection with the conductive bezel 110 through the mating structures of the conductive bezel 110 to reliably wear the electronic device 100 to the user's hand. In one embodiment, strap assembly 200 can also be easily detached from conductive bezel 110 to enable a user to easily replace strap assembly 200. For example, a user may purchase a variety of strap assemblies 200 and replace the strap assemblies 200 according to a use scenario to improve convenience of use. For example, a user may use a more formal strap assembly 200 in a formal setting and use a casual style strap assembly 200 in a recreational setting.
With continued reference to fig. 2, an antenna assembly is provided in an embodiment of the present application. Specifically, the antenna assembly may include a first radiator 111, a second radiator 113, a radio frequency processing circuit 130, and an impedance circuit 140. Wherein, the first radiator 111 and the second radiator 113 are both formed on the conductive frame 110.
The first radiator 111 may be configured to radiate a first radio frequency signal of a first communication system. Further, the first radiator 111 may be further provided with a feeding point S1 for connection to the signal source 101 and a return point G1 for connection to the reference ground. The signal source 101 may be configured to generate an excitation signal (also referred to as a radio frequency signal), and transmit the excitation signal to the first radiator 111 through the feeding point S1, so that the first radiator 111 transmits and receives the first radio frequency signal.
The second radiator 113 is provided with a feeding point S2 for feeding an excitation signal to the second radiator 113. The rf processing circuit 130 is connected to the feeding point S2, and is configured to feed an excitation signal to the feeding point S2, so that the second radiator 113 radiates a second rf signal of a second communication system. Further, a return point (not shown) is also provided on the second radiator 113 for connecting to the reference ground. The reference ground electrode electrically connected to the first radiator 111 and the reference ground electrode electrically connected to the second radiator 113 may be the same reference ground electrode.
The radio frequency processing circuit 130 includes, but is not limited to, at least one amplifier, coupler, low noise amplifier (Low Noise Amplifier, LNA), diplexer, and the like. In addition, the radio frequency processing circuit 130 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications (Global System of Mobile communication, GSM), general Packet Radio Service (GPRS), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), long term evolution (Long Term Evolution, LTE)), email, short message Service (Short MESSAGING SERVICE, SMS), and the like.
The resonance frequency points of the first radio frequency signal and the second radio frequency signal are different, that is, the communication frequency ranges of the first radio frequency signal and the second radio frequency signal are different. In the embodiment of the application, the first communication system can be a GPS communication system, a Bluetooth communication system or a WiFi communication system, and the second communication system can be a 4G (Long Term Evolution, LTE) communication system or a 5G (New Radio, NR) communication system. Correspondingly, the first communication system can be a 4G LTE communication system or a 5G NR communication system, and the second communication system can be a GPS communication system, a Bluetooth communication system or a WiFi communication system. In the following embodiments, a first communication system is taken as a GPS communication system, and a second communication system is taken as a 4G LTE communication system as an example for explanation. Specifically, the first radio frequency signal is a GPS signal, for example, the first radio frequency signal may include at least one of a GPS signal in an L1 frequency band and a GPS signal in an L5 frequency band. The second radio frequency signal may be an LTE signal, for example, the second radio frequency signal may include at least two of B1, B3, B5, B8, B38, B39, B40.
In the related art, when the first radiator 111 and the second radiator 113 operate simultaneously, the operating frequency band of the second radiator 113 does not include the operating frequency band (e.g., 1575 MHz) of the first radiator 111, and for the first radiator 111, the frequency point of the second radiator 113 at 1575MHz corresponds to a ground with a certain impedance. Thus, the feeding point S2 of the second radiator 113 can be understood as a return point of the first radiator 111, i.e. the rf processing circuit 130 connected to the feeding point S2 on the second radiator 113 corresponds to an impedance ground leg L of the first radiator 111. When the rf processing circuit 130 is in operation, the rf processing circuit 130 generates a plurality of varying impedances, and the transformed impedances affect the GPS signal radiated by the first radiator 111, thereby affecting the performance of the first radiator 111 for radiating the first rf signal.
Based on this, the antenna assembly in the embodiment of the application is connected to the rf processing circuit 130 by providing an impedance circuit 140. The impedance circuit 140 is configured to provide a preset impedance, so as to stabilize the total impedance of the impedance generated on the rf processing circuit 130 and the preset impedance provided by the impedance circuit 140 within a preset range. The preset range may be understood as a preset range centered on a fixed value and floating with a preset variable. The preset variable can be impedance values of 0, 1 and the like. The total impedance specifically comprises the sum of a first impedance generated by the radio frequency circuit in operation and a preset impedance. The first impedance may include, for example, an inherent impedance during operation and a varying impedance during operation. It should be noted that, the inherent impedance and the varying impedance are described in the following embodiments, and are not described herein.
When the sum of the preset impedance provided by the impedance circuit 140 and the impedance generated by the radio frequency circuit in the working process is stable within the preset range, the overall impedance of the grounding pin L can be ensured to be a stable value, so that the stability of the first radiator 111 radiating the first radio frequency signal is ensured, and the performance of radiating the first radio frequency signal is improved.
As shown in fig. 3 and 4, in one embodiment, the radio frequency processing circuit may include a plurality of transmission amplifying units 131, a matching unit 132, and a switching unit 133. The transmitting amplifying unit 131 may be configured to perform power amplifying processing on the received second radio frequency signal having a plurality of frequency bands. As illustrated in fig. 5 and 6, the transmission amplifying unit 131 may include a power amplifier 1311 capable of supporting power amplification of the second radio frequency signal of a different frequency band. Wherein the number of the transmitting amplifying units 131 may be set according to the frequency band included in the second radio frequency signal. For convenience of explanation, six power amplifiers 1311 may be provided, and amplification processing of the second radio frequency signals of the B38, B1 or B3, B39, B5, B8, B40 frequency bands may be implemented, respectively.
Further, the transmit amplifying unit 131 further includes a plurality of filtering units 1312 respectively connected to output ends of the power amplifiers 1311, so as to support filtering processing of the second radio frequency signals of the respective frequency bands. The number of filtering units 1312 may be equal to the number of power amplifiers 1311, and each filtering unit 1312 may output a second rf signal in the B38, B1 or B3, B39, B5, B8, B40 frequency band. Note that, the frequency bands of the second radio frequency signals output by the respective filter units 1312 are different. In addition, the second radio frequency signal is not limited to the above-exemplified frequency bands, and may include 4G LET signals of other frequency bands.
And a matching unit 132 connected to the feeding point S2 for adjusting an input impedance of the second radiator 113 to achieve impedance matching. In one embodiment, the matching unit 132 may include a radio frequency matching unit 1321 and an antenna matching unit 1322, so that an input impedance of an antenna end thereof and an input impedance of a radio frequency end thereof are 50 ohms to improve transmission performance of the second radiator 113. Wherein the antenna end and the rf end can be distinguished by the test socket 134 in the rf processing circuit 130. Specifically, the test socket 134 may be understood as a radio frequency end to the transmitting/amplifying unit 131 side, and the test socket 134 may be understood as an antenna side to the second radiator 113.
Specifically, the rf matching unit 1321 and the antenna matching unit 1322 include combinations of capacitance and/or inductance, respectively. In the embodiment of the present application, the specific composition forms of the rf matching unit 1321 and the antenna matching unit 1322 are not further limited.
And the switch unit 133 is connected to the plurality of emission amplifying units 131 in a one-to-one correspondence manner at a plurality of first ends of the switch unit 133, and a second end of the switch unit 133 is connected to the matching unit 132, so as to selectively conduct a first path between any one of the emission amplifying units 131 and the matching unit 132. The number of the first ends of the switch units 133 is equal to the number of the transmitting amplifying units 131, for example, the switch units 133 may be SPnT switches, where n is the number of the first ends of the switch units 133. If the rf processing circuit 130 includes six transmit amplifying units 131, the switching unit 133 may include six first terminals and one second terminal, and the switching unit 133 may be an SP6T switch, for example. When the 4G LTE cellular network needs to operate, the switch unit 133 performs state switching to perform network searching in different frequency bands. That is, the switching unit 133 performs switching of the target frequency band by selectively switching to a different transmission amplifying unit 131, so that the second radiator 113 can support transmission of the second radio frequency signal of the target frequency band. The target frequency band is one of the frequency bands B38, B1 or B3, B39, B5, B8 and B40.
The impedance of the matching unit 132, the power amplifier 1311, and the radio frequency cabling for connecting the respective devices in the radio frequency processing circuit 130 are all inherent properties of the devices, and thus, the impedance of this portion may be referred to as the inherent impedance of the radio frequency processing circuit 130. The switching unit 133 in the rf processing circuit 130 may implement switching between the plurality of transmitting amplifying units 131, and when switching between the plurality of transmitting amplifying units 131, the impedance of the rf circuit may change along with the switching of the switching unit 133, and as shown in fig. 7, the corresponding amount of change may be referred to as a transformed impedance of the rf circuit.
Wherein the impedance circuit 140 is connected to a second path between the second end of the switching unit 133 and the feeding point. By providing the impedance circuit 140 between the second end of the switch unit 133 and the feeding point S2, the preset impedance provided by the impedance circuit 140 can act on the variable impedance generated during the switching process of the switch unit 133 and the inherent impedance of the rf processing circuit 130, so that the preset impedance, the variable impedance and the inherent impedance are taken as the overall impedance of the grounding pin L, and therefore, the overall impedance can be stabilized within a preset range to ensure the performance of radiating the first rf signal.
Specifically, the impedance circuit 140 may be disposed at any node between the second end of the switching unit 133 and the feeding point S2. That is, the impedance circuit 140 may be disposed between the switching unit 133 and the matching unit 132, between the matching unit 132 and the feeding point, between the rf matching unit 1321 and the test socket 134, and the like. For convenience of explanation, in all the following embodiments, an impedance circuit 140 is exemplified as being disposed between the second end of the switching unit 133 and the matching unit 132.
With continued reference to fig. 3 and 5, in one embodiment, the impedance circuit 140 is connected in series with the rf processing circuit 130, and the impedance circuit 140 presents a high impedance in a communication band (e.g., GPS band) of the first rf signal. That is, the impedance circuit 140 may present a high impedance at the 1575MHz frequency point.
As shown in fig. 8, the impedance circuit 140 may include a first capacitor C1 and a first inductor L1 connected in parallel. The first end of the first capacitor C1 is connected to the matching unit and the first end of the first inductor L1, and the second end of the first capacitor C1 is connected to the second end of the switching unit and the second end of the first inductor L1. The band-stop frequency band (e.g., GPS frequency band) of the impedance circuit 140 can be adjusted by adjusting the capacitance of the first capacitor C1 and the inductance of the first inductor L1, so that the impedance circuit 140 presents a high impedance state in the band-stop frequency band.
As shown in fig. 9, in one embodiment, the impedance circuit 140 includes a first capacitor C1, a first inductor L1, and a second inductor L2, where a first end of the second inductor L2 is connected to a second end of the first capacitor C1 and a second end of the first inductor L1, respectively, and a second end of the second inductor L2 is connected to a second end of the switching unit 133. The band-stop frequency band of the impedance circuit 140 can be adjusted by adjusting the capacitance value of the first capacitor C1, the inductance values of the first inductor L1 and the second inductor L2, so that the impedance circuit 140 presents a high impedance state in the band-stop frequency band (e.g., GPS frequency band).
As shown in fig. 10, when the switch unit 133 is switched, by connecting the impedance circuit 140 that presents a high impedance in the communication frequency band (e.g., GPS frequency band) of the first radio frequency signal in series at the front end of the switch unit 133, even if the impedance in the radio frequency direction (as indicated by the dashed arrow in the figure) is changed due to the switch unit 133 being switched, the impedance in the radio frequency direction (as indicated by the solid arrow in the figure) is still high from the impedance circuit 140, so that the overall impedance of the radio frequency processing circuit 130 and the impedance circuit 140 can be stabilized within the preset range, and the performance stability of the GPS antenna can be further ensured. The overall impedance of the rf processing circuit 130 and the impedance circuit 140 may be equivalent to the overall impedance of the ground pin L. The radio frequency direction may be understood as a direction from the feeding point to the transmitting amplifying unit 131, for example, a direction from the feeding point to the power amplifier 1311.
With continued reference to fig. 4 and 6, in one embodiment, the impedance circuit 140 is disposed in parallel with the rf processing circuit 130 and grounded, and the impedance circuit 140 presents a low impedance over a communication band (e.g., GPS band) of the first rf signal. That is, the impedance circuit 140 may present a low impedance at the 1575MHz frequency point.
As shown in fig. 11, in one embodiment, the impedance circuit 140 processes a capacitor including a second capacitor C2 and a third inductor L3 connected in series. The first end of the second capacitor C2 is connected to the second path, and the second end of the second capacitor C2 is grounded through the third inductor L3. The band-pass frequency band (e.g., GPS frequency band) of the impedance circuit 140 can be adjusted by adjusting the capacitance of the second capacitor C2 and the inductance of the third inductor L3, so that the impedance circuit 140 presents a low-impedance state in the band-pass frequency band.
As shown in fig. 12, in one embodiment, the impedance circuit 140 processes a capacitor including a second capacitor C2, a third inductor L3, and a fourth inductor L4. The fourth inductor L4 may be disposed in parallel with the second capacitor C2 and the third inductor L3 connected in series, that is, the first end of the fourth inductor L4 is connected to the first end of the second capacitor C2, and the second end of the fourth inductor L4 is connected to the second end of the third inductor L3. The band-pass frequency band (e.g., GPS frequency band) of the impedance circuit 140 can be adjusted by adjusting the capacitance value of the second capacitor C2, the inductance values of the third inductor L3 and the fourth inductor L4, so that the impedance circuit 140 exhibits a low impedance state in the band-pass frequency band.
As shown in fig. 13, when the switch unit 133 is switched, by connecting the impedance circuit 140 that presents a low impedance in the communication frequency band (e.g., GPS frequency band) of the first radio frequency signal in parallel to the front end of the switch unit 133, even if the impedance in the radio frequency direction (as indicated by the dashed arrow in the figure) is changed due to the switch unit 133 being switched, the impedance in the radio frequency direction (as indicated by the solid arrow in the figure) is still low from the impedance circuit 140, so that the overall impedance of the radio frequency processing circuit 130 and the impedance circuit 140 can be stabilized within the preset range, and the performance stability of the GPS antenna can be further ensured.
Optionally, the impedance circuit 140 may also be an integrated circuit (INTEGRATED CIRCUIT, IC) module integrated with a capacitive, inductive, or other device. In the embodiment of the present application, the specific composition of the impedance circuit 140 is not limited, and may not be limited to the illustration in the above embodiment.
With continued reference to fig. 2, in one embodiment, the conductive frame 110 may be a completely seamless conductive frame 110, and the first radiator 111 and the second radiator 113 may be the same conductive frame 110, that is, the conductive frame 110 may be used as both the first radiator 111 and the second radiator 113.
As shown in fig. 14, alternatively, the conductive frame 110 may be provided with a slit 102, and the slit 102 separates the conductive frame 110 into a first conductive body and a second conductive body. The first radiator 111 is formed on the first conductor, the second radiator 113 is formed on the second conductor, and the second radiator 113 may act as a coupling branch of the first radiator 111. Specifically, the first radiator 111 includes a first ground return end G1 and a first free end F1, and the second radiator 113 includes a second ground return end G2 and a second free end F2. The first ground return end G1 and the second ground return end G2 are respectively electrically connected with the ground layer on the substrate. The first free end F1 and the second free end F2 are disposed opposite each other. Wherein a coupling gap is formed between the first free end F1 and the second free end F2, in other words, the first radiator 111 and the second radiator 113 are capacitively coupled through the coupling gap. Further, the feeding point S1 on the first radiator 111 may be disposed between the first ground return G1 and the first free end F1, and the feeding point S2 on the second radiator 113 may be disposed between the second ground return G2 and the second free end F2.
In one embodiment, the feeding points on the first and second radiators 111, 113 may be connected to respective signal sources through feeding portions. The feeding portion may be a conductive spring or a screw, where coupling points between the conductive spring or the screw and the first radiator 111 and the second radiator 113 respectively may be used as feeding points S1 and S2. The first excitation signal output by the signal source 101 may be fed to the first radiator 111 through the feed point S1 by a feeding manner of a spring or a screw, so as to excite a first radio frequency signal for generating a resonant frequency on the first radiator 111. The second excitation signal output by the rf processing circuit 130 may be fed to the second radiator 113 through the feed point S2 by means of a feeding manner of a spring or a screw, so as to excite a second rf signal for generating a resonant frequency on the second radiator 113.
In one embodiment, the return points G1 and G2 on the first radiator 111 and the second radiator 113 may be connected to the ground layer of the substrate through connection portions, respectively, so as to achieve conduction with the ground. The connecting part can be a conductor such as a spring plate and a screw or a flexible circuit board. The connection part may be a connection arm made of the same material as the radiator. For example, the connection part may be integrally formed with the first radiator 111 and the second radiator 113 to simplify the structure of the antenna assembly.
As shown in fig. 15, further illustrative is a wearable device as a smart watch, and in particular, as shown in fig. 15, the smart watch may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral interface 23, a radio frequency component 24, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the smart watch shown in fig. 15 is not limiting of a cell phone and may include more or fewer components than shown, or may combine certain components, or may have a different arrangement of components. The various components shown in fig. 15 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.
Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in the memory 21 include an operating system 211, a communication module (or instruction set) 212, a Global Positioning System (GPS) module (or instruction set) 213, and the like.
The processor 22 and other control circuitry, such as control circuitry in the radio frequency assembly 24, may be used to control the operation of the smart watch. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like.
The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the smart watch. The processor 22 may also issue control commands or the like for controlling the various switches in the radio frequency assembly 24.
The I/O subsystem 26 couples input/output peripheral devices on the smart watch, such as keypads and other input control devices, to the peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of the smartwatch by supplying commands via the I/O subsystem 26, and may use the output resources of the I/O subsystem 26 to receive status information and other outputs from the smartwatch. For example, a user may activate the handset or deactivate the handset by pressing button 261.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (11)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110681147.1A CN115498399B (en) | 2021-06-18 | 2021-06-18 | Antenna Assemblies, Electronic Devices and Wearable Devices |
| PCT/CN2022/091088 WO2022262454A1 (en) | 2021-06-18 | 2022-05-06 | Antenna assembly, electronic device, and wearable device |
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| CN202110681147.1A CN115498399B (en) | 2021-06-18 | 2021-06-18 | Antenna Assemblies, Electronic Devices and Wearable Devices |
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| JP4637774B2 (en) * | 2006-03-17 | 2011-02-23 | 富士通株式会社 | Mobile communication terminal |
| CN107681249B (en) * | 2016-07-21 | 2019-12-20 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with same |
| CN109962329A (en) * | 2017-12-22 | 2019-07-02 | 华为技术有限公司 | An antenna and communication device |
| CN108428995B (en) * | 2018-03-30 | 2022-07-26 | 联想(北京)有限公司 | Electronic device |
| CN110855310A (en) * | 2018-07-26 | 2020-02-28 | 西安中兴新软件有限责任公司 | Matching circuit, terminal and matching method |
| CN110444885A (en) * | 2019-08-28 | 2019-11-12 | Oppo（重庆）智能科技有限公司 | A kind of antenna module, mobile phone, control method and electronic equipment |
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| CN112086752A (en) * | 2020-09-30 | 2020-12-15 | Oppo广东移动通信有限公司 | Antenna Components and Electronics |
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| CN110504977A (en) * | 2019-08-22 | 2019-11-26 | 歌尔科技有限公司 | A kind of multiband impedance matching circuit and radio frequency system |
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| CN115498399A (en) | 2022-12-20 |
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