WO2022262454A1

WO2022262454A1 - Antenna assembly, electronic device, and wearable device

Info

Publication number: WO2022262454A1
Application number: PCT/CN2022/091088
Authority: WO
Inventors: 王黄腾龙
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-06-18
Filing date: 2022-05-06
Publication date: 2022-12-22
Also published as: CN115498399A

Abstract

An antenna assembly, the antenna assembly comprising: a first radiator (111) for radiating a first radio frequency signal of a first communication standard; a second radiator (113) provided with a feeding point (S1); a radio frequency processing circuit (130) connected to the feeding point (S1) to feed an excitation signal to the feeding point (S1), so that the second radiator (113) radiates a second radio frequency signal of a second communication standard; and an impedance circuit (140) connected to the radio frequency processing circuit (130) to provide a preset impedance, so as to stabilize within a preset range the total impedance of the impedance generated on the radio frequency processing circuit (130) and the preset impedance.

Description

Antenna components, electronics and wearables

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 2021106811471 titled "antenna assembly, electronic device and wearable device" filed with the China Patent Office on June 18, 2021, the entire contents of which are hereby incorporated by reference into this application middle.

technical field

The present application relates to the technical field of antennas, in particular to an antenna assembly, electronic equipment and wearable equipment.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior exemplary art.

With the development of wireless communication technology, users have higher and higher requirements on the portability and appearance of electronic equipment. An antenna of an electronic device with a metal frame is mainly implemented based on the metal frame. Generally, multiple antennas (for example, GPS antennas and LTE antennas) are provided in electronic equipment for radiating radio frequency signals of different communication systems. However, when one of the antennas is working, it will affect the radiation performance of the other antenna. For example, when the LTE antenna is working, it will affect the radiation performance of the GPS antenna for radiating GPS signals.

Contents of the invention

According to various embodiments of the present application, an antenna assembly, an electronic device, and a wearable device are provided.

In the first aspect, the embodiment of the present application provides an antenna assembly, including:

a first radiator, configured to radiate a first radio frequency signal of a first communication standard;

The second radiator is provided with a feed point;

A radio frequency processing circuit, connected to the feed point, for feeding an excitation signal to the feed 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, is used to provide 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, wherein the first 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 aforementioned antenna assembly;

a conductive frame, the first radiator and the second radiator are formed on the conductive frame;

The substrate is accommodated in the cavity formed by the conductive frame, and the radio frequency processing circuit and the impedance circuit are both arranged on the substrate.

In a third aspect, the embodiment of the present application provides a wearable device, including:

Strap components;

In the foregoing electronic device, the strap assembly is used to wear the electronic device at a wearing position of a user.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the present application will be apparent from the description, drawings and claims.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a three-dimensional structure of a wearable device in an embodiment;

Fig. 2 is a first structural schematic diagram of an antenna assembly in an embodiment;

3 is a schematic circuit diagram of an impedance circuit of an antenna component and a radio frequency processing circuit in an embodiment;

FIG. 4 is a schematic circuit diagram of an antenna assembly impedance circuit and a radio frequency processing circuit in another embodiment;

Fig. 5 is a schematic circuit diagram of an antenna component impedance circuit and a radio frequency processing circuit in another embodiment;

6 is a schematic circuit diagram of an impedance circuit of an antenna component and a radio frequency processing circuit in another embodiment;

FIG. 7 is a curve diagram of impedance changes during the switching process of the switch unit in an embodiment;

8 is a schematic circuit diagram of an impedance circuit in an embodiment;

9 is a schematic circuit diagram of an impedance circuit in another embodiment;

Fig. 10 is a schematic structural diagram of an antenna assembly in another embodiment;

11 is a schematic circuit diagram of an impedance circuit in another embodiment;

12 is a schematic circuit diagram of an impedance circuit in another embodiment;

Fig. 13 is a schematic structural diagram of an antenna assembly in another embodiment;

Fig. 14 is a schematic structural diagram of an antenna assembly in yet another embodiment;

Fig. 15 is a schematic diagram of a frame structure of a wearable device in an embodiment.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

It can be understood that the terms "first", "second" and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element, and should not be interpreted as indicating or implying relative importance or implying the number of technical features indicated. For example, a first radiator could be termed a second radiator, and, similarly, a second radiator could be termed a first radiator, without departing from the scope of the present application. Both the first radiator and the second radiator are light emitting components, but they are not the same light emitting component.

Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

It should be noted that when an element is referred to as being “attached to” another element, it can be directly on the other element or there can also be an intervening element. 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 Figure 1 and Figure 2 together. FIG. 1 is a schematic diagram of a three-dimensional structure of a wearable device in an embodiment of the present application, and FIG. 2 is a schematic diagram of a first structure of an antenna assembly in an embodiment of the present 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 is mounted on the strap assembly 200 and can be worn on the user's wrist through the strap assembly 200. That is, the strap assembly 200 can wear the electronic device 100 at a user's wearing position, for example, a wrist, an ankle, a head and other wearing positions. In one embodiment, the wearable device 10 is a smart watch, a smart bracelet, a pedometer, and the like.

As shown in FIG. 2 , the electronic device 100 includes a conductive frame 110 , a rear cover, a display panel assembly, a substrate 120 and a radio frequency circuit. The display screen assembly 120 is fixed on the housing assembly formed by the conductive frame 110 and the back cover. The display screen assembly 120 and the housing assembly together form the external structure of the electronic device 10. The display screen assembly 120 can be used to display pictures or fonts, and can be The user provides an operation interface.

In one embodiment, the conductive frame 110 may be a frame structure with through holes. The material of the conductive frame 110 may include metal frames such as aluminum alloy and magnesium alloy.

In one embodiment, the conductive frame 110 is a rectangular frame with rounded corners, wherein the conductive frame 110 may include a first frame and a third frame opposite to each other, a second frame and a fourth frame opposite to each other, wherein the first frame The second frame is respectively connected with the first frame and the third frame. Wherein, the first frame can be understood as the top frame of the electronic device 100 , the third frame can be understood as the bottom frame of the electronic device 100 , and the second frame and the fourth frame can be understood as the side frames of the electronic device 100 .

The antenna assembly may be partially or entirely formed by a part of the conductive frame 110 of the electronic device 100 . Exemplarily, the radiator of the antenna assembly may be partially integrated in at least one of the top frame, bottom frame and side frame of the electronic device 100 .

The substrate 120 can be accommodated in the accommodation space formed by the conductive frame 110 and the rear cover. The substrate 120 may be a PCB (Printed Circuit Board, printed circuit board) or an FPC (Flexible Printed Circuit, flexible circuit board). Some radio frequency circuits for processing radio frequency signals may be integrated on the substrate 120 , and a controller capable of controlling the operation of the electronic device 100 may also be integrated.

In one of the embodiments, the side of the conductive frame 110 can be provided with a matching structure for installing the strap assembly 200, and the strap assembly 200 can form a reliable connection with the conductive frame 110 through the matching structure of the conductive frame 110, so that the electronic device 100 securely fits to the user's hand. In one of the embodiments, the strap assembly 200 can be easily detached from the conductive frame 110 so that the user can replace the strap assembly 200 conveniently. For example, the user can purchase strap assemblies 200 of various styles, and replace the strap assemblies 200 according to usage scenarios, so as to improve the convenience of use. For example, the user can use a more formal strap assembly 200 on formal occasions, and use a casual-style strap assembly 200 on recreational occasions.

Please continue to refer to FIG. 2 , the embodiment of the present application provides an antenna assembly. 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, both the first radiator 111 and the second radiator 113 are formed on the conductive frame 110 .

Wherein, the first radiator 111 may be used to radiate a first radio frequency signal of a first communication standard. Further, the first radiator 111 may also be provided with a feed point S1 for connecting with the signal source 101 and a return point G1 for connecting with the reference ground. Wherein, the signal source 101 can be used 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 can send and receive the first radio frequency signal.

A feeding point S2 is provided on the second radiator 113 , and an excitation signal can be fed into the second radiator 113 . Wherein, the radio frequency processing circuit 130 is connected with the feeding point S2, and is used for feeding an excitation signal into the feeding point S2, so that the second radiator 113 radiates a second radio frequency signal of the second communication standard. Further, a return point (not shown in the figure) is also provided on the second radiator 113 for connecting to the reference ground. Wherein, the reference ground electrically connected to the first radiator 111 and the reference ground electrically connected to the second radiator 113 may be the same reference ground.

The radio frequency processing circuit 130 includes but is not limited to at least one amplifier, a coupler, a low noise amplifier (Low Noise Amplifier, LNA), a duplexer, and the like. In addition, the radio frequency processing circuit 130 can also communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile communication (Global System of Mobile communication, GSM), General Packet Radio Service (General Packet Radio Service, GPRS), Code Division Multiple Access (Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE)), email, Short Messaging Service (SMS), etc.

Wherein, 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 present application, the first communication system may be a GPS communication system, or a Bluetooth communication system, or a WiFi communication system; the second communication system may be a 4G (Long Term Evolution, LTE) communication system, or It is a 5G (New Radio, NR) communication standard. Correspondingly, the first communication standard may be the 4G LTE communication standard, or the 5G NR communication standard; the second communication standard may be the GPS communication standard, may also be the Bluetooth communication standard, and may also be the WiFi communication standard. In the following embodiments, the first communication standard is the GPS communication standard, and the second communication standard is the 4G LTE communication standard as an example for illustration. 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, and B40.

In the related art, when the first radiator 111 and the second radiator 113 work at the same time, the working frequency band of the second radiator 113 does not include the working frequency band of the first radiator 111 (for example, 1575MHz), for the first radiator 111, the second radiator 113 is equivalent to a ground with a certain impedance at the frequency point of 1575MHz. Therefore, the feed point S2 of the second radiator 113 can be understood as a return point of the first radiator 111, that is, the radio frequency processing circuit 130 connected to the feed point S2 on the second radiator 113 is equivalent to An impedance grounding pin L of the first radiator 111 . When the radio frequency processing circuit 130 is in operation, the radio frequency processing circuit 130 will produce some changing impedances, and the transformed impedance will affect the radiation of the GPS signal by the first radiator 111, which in turn will affect the radiation of the first radio frequency signal by the first radiator 111. performance.

Based on this, the antenna assembly in the embodiment of the present application is connected to the radio frequency processing circuit 130 by setting an impedance circuit 140 . Wherein, the impedance circuit 140 is used to provide a preset impedance, so as to stabilize the total impedance of the impedance generated on the radio frequency processing circuit 130 and the preset impedance provided by the impedance circuit 140 within a preset range. The preset range can be understood as a preset range with a fixed value as the center and a preset variable as a floating range. Wherein, the preset variable may be an impedance value such as 0, 1, or the like. Wherein, the total impedance specifically includes the sum of the first impedance generated by the radio frequency circuit during operation and the preset impedance. Wherein, the first impedance may include, for example, the inherent impedance during operation and the variable impedance caused during operation. It should be noted that the intrinsic impedance and variable impedance are described in the following embodiments and will not be repeated here.

When the sum of the preset impedance provided by the impedance circuit 140 and the impedance generated by the radio frequency circuit during operation is stable within a preset range, it can be ensured that the overall impedance of the ground pin L is a stable value, thereby ensuring that the first radiator 111 radiates The stability of the first radio frequency signal is used to improve the performance of radiating the first radio frequency signal.

As shown in FIG. 3 and FIG. 4 , in one embodiment, the radio frequency processing circuit may include a plurality of transmitting amplifying units 131 , a matching unit 132 and a switching unit 133 . Wherein, the transmitting amplifying unit 131 may be configured to perform power amplifying processing on the received second radio frequency signal having multiple frequency bands. Exemplarily, as shown in FIG. 5 and FIG. 6 , the transmit amplifying unit 131 may include a power amplifier 1311 capable of supporting power amplification of second radio frequency signals in different frequency bands. Wherein, the number of transmitting amplifying units 131 can be set according to the frequency band included in the second radio frequency signal. For the convenience of description, six power amplifiers 1311 can be set, which can respectively realize the amplification processing of the second radio frequency signals in the B38, B1 or B3, B39, B5, B8, B40 frequency bands.

Further, the transmitting amplifying unit 131 also includes a plurality of filtering units 1312 respectively connected to the output ends of the power amplifiers 1311, so as to support the filtering processing of the second radio frequency signal in each frequency band. Wherein, the number of filtering units 1312 may be equal to the number of power amplifiers 1311, and each filtering unit 1312 may correspondingly output the second radio frequency signal of B38, B1 or B3, B39, B5, B8, B40 frequency bands. It should be noted that the frequency bands of the second radio frequency signals output by each filtering unit 1312 are different. In addition, the second radio frequency signal is not limited to the multiple frequency bands illustrated above, and may also include 4G LTE signals in other frequency bands.

The matching unit 132 is connected to the feeding point S2 and configured to adjust the 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 the input impedance of the antenna end and the input impedance of the radio frequency end are 50 ohms, so as to improve the transmission performance of the second radiator 113 . Wherein, the antenna end and the radio frequency end can be distinguished by the test socket 134 in the radio frequency processing circuit 130 . Specifically, the side from the test socket 134 to the transmitting amplifying unit 131 can be understood as the radio frequency end; the direction from the test socket 134 to the second radiator 113 can be understood as the antenna side.

Specifically, the radio frequency matching unit 1321 and the antenna matching unit 1322 respectively include a combination of capacitors and/or inductors. In the embodiment of the present application, no further limitation is made on the specific composition forms of the radio frequency matching unit 1321 and the antenna matching unit 1322 .

A switch unit 133, a plurality of first ends of the switch unit 133 are respectively connected to a plurality of transmitting amplifying units 131 in one-to-one correspondence, and a second end of the switch unit 133 is connected to the matching unit 132 for selectively conducting any A first path between the transmitting amplifying unit 131 and the matching unit 132 respectively. Wherein, the number of the first terminals of the switch unit 133 is equal to the number of the transmitting amplifying units 131, for example, the switch unit 133 may be an SPnT switch, where n is the number of the first terminals of the switch unit 133. If the radio frequency processing circuit 130 includes six transmitting amplifying units 131 , the switch unit 133 may include six first terminals and one second terminal. Exemplarily, the switch unit 133 may be an SP6T switch. When the 4G LTE cellular network needs to work, the switch unit 133 will perform state switching to perform network searches in different frequency bands. That is, the switch unit 133 selects and switches to a different transmitting amplifying unit 131 to switch the target frequency band, so that the second radiator 113 can support the transmission of the second radio frequency signal of the target frequency band. Wherein, the target frequency band is one of B38, B1 or B3, B39, B5, B8, B40 frequency bands.

Impedances of the matching unit 132 , the power amplifier 1311 , and the RF traces used to connect each device in the RF processing circuit 130 are all inherent properties of the device. Therefore, the impedance of this part can be called the inherent impedance of the RF processing circuit 130 . The switch unit 133 in the radio frequency processing circuit 130 can realize the switching between a plurality of transmission amplifying units 131, when switching between a plurality of transmitting amplifying units 131, the impedance of its radio frequency circuit will follow the switching of the switching unit 133 As for the change, as shown in FIG. 7 , the corresponding change amount can be called the transformation impedance of the radio frequency circuit.

Wherein, the impedance circuit 140 is connected to the second path between the second end of the switch unit 133 and the feeding point. By providing an 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 RF processing circuit 130. Intrinsic impedance, the preset impedance, variable impedance and intrinsic impedance are used as the overall impedance of the grounding pin L, therefore, the overall impedance can be stabilized within a preset range to ensure the performance of radiating the first radio frequency signal.

Specifically, the impedance circuit 140 may be disposed on any node between the second end of the switch unit 133 and the feeding point S2. That is to say, the impedance circuit 140 can be arranged between the switch unit 133 and the matching unit 132 , between the matching unit 132 and the feeding point, or between the RF matching unit 1321 and the test socket 134 , etc. For ease of description, in all the following embodiments, the impedance circuit 140 is disposed between the second end of the switch unit 133 and the matching unit 132 as an example for illustration.

Please continue to refer to FIG. 3 and FIG. 5. In one embodiment, the impedance circuit 140 is connected in series in the radio frequency processing circuit 130, and the impedance circuit 140 is in the communication frequency band of the first radio frequency signal (for example, GPS band) presents high impedance. That is to say, the impedance circuit 140 can present high impedance at the frequency point of 1575 MHz.

As shown in FIG. 8 , the impedance circuit 140 may include a first capacitor C1 and a first inductor L1 connected in parallel. Wherein, the first end of the first capacitor C1 is respectively connected to the matching unit and the first end of the first inductor L1, and the second end of the first capacitor C1 is respectively connected to the second end of the switch unit and the second end of the first inductor L1. connect. Wherein, by adjusting the capacitance value of the first capacitor C1 and the inductance value of the first inductor L1, the band-stop frequency band (for example, GPS frequency band) of the impedance circuit 140 can be adjusted, 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 . Wherein, the first end of the second inductor L2 is electrically connected to the connection node between the second end of the first capacitor C1 and the second end of the first inductor L1, and the second end of the second inductor L2 is connected to the switch unit 133 of the radio frequency processing circuit. The second terminal of the first capacitor C1 and the first terminal of the first inductor L1 are connected to the matching unit of the radio frequency processing circuit. That is, the first end of the second inductor L2 is respectively connected to the second end of the first capacitor C1 and the second end of the first inductor L1, and the second end of the second inductor L2 is connected to the second end of the switch unit 133, The first end of the first capacitor C1 is respectively connected to the first end of the first inductor L1 and the matching unit. Wherein, 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 is in the band-stop frequency band (for example, GPS frequency band) presents a high-impedance state.

As shown in Figure 10, when the switch unit 133 is switched, an impedance circuit 140 that presents a high impedance in the communication frequency band (for example, GPS frequency band) of the first radio frequency signal is connected in series at the front end of the switch unit 133, even if the switch unit 133 is switched to cause The impedance seen from the switch unit 133 to the radio frequency direction (the dotted arrow in the figure) changes, but the impedance seen from the impedance circuit 140 to the radio frequency direction (the solid line arrow in the figure) is still high impedance, so the radio frequency can be processed The overall impedance of the circuit 130 and the impedance circuit 140 is stable within a preset range, thereby ensuring stable performance of the GPS antenna. Wherein, the overall impedance of the radio frequency processing circuit 130 and the impedance circuit 140 may be equivalent to the overall impedance of the ground pin L. The radio frequency direction can be understood as the direction from the feed point to the transmitting amplifying unit 131, for example, the direction from the feed point to the power amplifier 1311.

Please continue to look at Figure 4 and Figure 6, in one of the embodiments, the impedance circuit 140 is connected to part of the paths in the radio frequency processing circuit 130 and grounded, and the impedance circuit 140 is connected to the first radio frequency signal Low impedance on the communication frequency band (for example, GPS frequency band). That is to say, the impedance circuit 140 can present low impedance at the frequency point of 1575 MHz.

As shown in FIG. 11 , in one embodiment, the impedance circuit 140 includes a second capacitor C2 and a third inductor L3 connected in series. Wherein, 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. By adjusting the capacitance of the second capacitor C2 and the inductance of the third inductor L3 , the band-pass frequency band (for example, GPS band) of the impedance circuit 140 can be adjusted, so that the impedance circuit 140 exhibits a low-impedance state in the band-pass band.

As shown in FIG. 12 , in one embodiment, the impedance circuit 140 includes a second capacitor C2 , a third inductor L3 and a fourth inductor L4 . Wherein, the fourth inductance L4 can be arranged in parallel with the second capacitor C2 and the third inductance L3 connected in series, that is, the first end of the fourth inductance L4 is connected to the first end of the second capacitor C2, and the first end of the fourth inductance L4 The two terminals are connected to the second terminal of the third inductor L3. By adjusting the capacitance of the second capacitor C2, the inductance of the third inductance L3 and the fourth inductance L4, the band-pass frequency band (for example, GPS frequency band) of the impedance circuit 140 can be adjusted, so that the impedance circuit 140 presents a low band-pass frequency band. resistance state.

As shown in Figure 13, when the switch unit 133 switches, the impedance circuit 140 that presents a low impedance in the communication frequency band (for example, GPS frequency band) of the first radio frequency signal is connected in parallel at the front end of the switch unit 133, even if the switch unit 133 is switched to cause The impedance seen from the switch unit 133 to the radio frequency direction (the dotted arrow in the figure) changes, but the impedance seen from the impedance circuit 140 to the radio frequency direction (the solid line arrow in the figure) is still low impedance, so the radio frequency can be processed The overall impedance of the circuit 130 and the impedance circuit 140 is stable within a preset range, thereby ensuring stable performance of the GPS antenna.

Optionally, the impedance circuit 140 may also be an integrated circuit (integrated circuit, IC) module integrated with capacitors, inductors or other devices. In the embodiment of the present application, the specific composition form of the impedance circuit 140 is not further limited, and may not be limited to the illustrations in the foregoing embodiments.

Please continue to refer to FIG. 2. In one embodiment, the conductive frame 110 can be a complete and seamless conductive frame 110, and the first radiator 111 and the second radiator 113 share the same conductive frame 110, that is, the conductive frame 110 is both It can be used as the first radiator 111 or as the second radiator 113 .

As shown in FIG. 14 , optionally, the conductive frame 110 may also be provided with a slit 102 , and the slit 102 separates the conductive frame 110 into an independent first conductor and a second conductor. Wherein, 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 can be used as a coupling branch of the first radiator 111 . Specifically, the first radiator 111 includes a first ground terminal G1 and a first free terminal F1, and the second radiator 113 includes a second ground terminal G2 and a second free terminal F2. The first ground terminal G1 and the second ground terminal G2 are respectively electrically connected to the ground layer on the substrate. The first free end F1 and the second free end F2 are oppositely arranged. 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 feed point S1 on the first radiator 111 can be set between the first ground terminal G1 and the first free end F1, and the feed point S2 on the second radiator 113 can be set at the second ground terminal end G2 and the second free end F2.

In one embodiment, the feeding points on the first radiator 111 and the second radiator 113 may be connected to respective signal sources through feeding parts. Wherein, the feeding part may be a conductive elastic piece or a screw, wherein the coupling points of the conductive elastic piece or screw and the first radiator 111 and the second radiator 113 respectively may serve as feeding points S1 and S2 . Wherein, the first excitation signal output by the signal source 101 can be fed into the first radiator 111 through the feeding point S1 through the feeding method of the shrapnel or the screw, so as to excite the A first radio frequency signal at a resonant frequency is generated. The second excitation signal output by the radio frequency processing circuit 130 can be fed into the second radiator 113 through the feed point S2 through the feeding method of the shrapnel or the screw, so as to excite the output on the second radiator 113 for generating A second radio frequency signal at a resonant frequency.

In one embodiment, the return points G1 and G2 on the first radiator 111 and the second radiator 113 can be respectively connected to the ground layer of the substrate through connecting parts, so as to realize conduction with the ground. Wherein, the connection part may be a conductor such as a shrapnel, a screw, or a flexible circuit board. The connecting part may also be a connecting arm made of the same material as the radiator. Exemplarily, the connection part can be integrally formed with the first radiator 111 and the second radiator 113, so as to simplify the structure of the antenna assembly.

As shown in Figure 15, further, the wearable device is a smart watch as an example for illustration, specifically, as shown in Figure 15, the smart watch may include a storage circuit 21 (which optionally includes one or more computer-controlled read storage medium), processor 22, peripheral device interface 23, radio frequency component 24, 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 can understand that the smart watch shown in FIG. 15 does not constitute a limitation to the mobile phone, and may include more or less components than shown in the figure, or combine some components, or arrange different 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.

Storage circuitry 21 optionally includes high-speed random access memory, and optionally also includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the storage circuit 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.

Processor 22 and other control circuits, such as those in 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.

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 and the like for controlling switches in the radio frequency component 24 .

I/O subsystem 26 couples input/output peripherals on the smart watch, such as keypads and other input control devices, to peripherals interface 23 . 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, and the like. Exemplarily, a user may control the operation of the smart watch by supplying commands via I/O subsystem 26 and may use the output resources of I/O subsystem 26 to receive status information and other output from the smart watch. For example, the user can turn on or turn off the mobile phone by pressing the button 261 .

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

An antenna assembly comprising:

a first radiator, configured to radiate a first radio frequency signal of a first communication standard;

The second radiator is provided with a feed point;

A radio frequency processing circuit, connected to the feed point, for feeding an excitation signal to the feed 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, is used to provide 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, wherein the first The frequency range of the first radio frequency signal is different from that of the second radio frequency signal.
The antenna assembly according to claim 1, wherein the impedance circuit is connected in series in the radio frequency processing circuit, and the impedance circuit exhibits high impedance in the communication frequency band of the first radio frequency signal.
The antenna assembly of claim 2, wherein the impedance circuit includes a first capacitor and a first inductor connected in parallel.
The antenna assembly according to claim 3, wherein the impedance circuit further comprises: a second inductor, wherein the first end of the second inductor is electrically connected to the second end of the first capacitor and the first The connection node of the second end of the inductor, the second end of the second inductor is connected to the radio frequency processing circuit, the first end of the first capacitor, the connection node of the first end of the first inductor and the RF processing circuit connection.
The antenna assembly according to claim 1, wherein the impedance circuit is grounded and connected in parallel with a part of the path in the radio frequency processing circuit, and the impedance circuit has a low impedance on the communication frequency band of the first radio frequency signal .
The antenna assembly of claim 5, wherein the impedance circuit includes a second capacitor and a third inductor connected in series.
The antenna assembly according to claim 6, wherein the impedance circuit further comprises a fourth inductance, wherein the first end of the fourth inductance is respectively connected to the first end of the second capacitor, the radio frequency processing circuit connected, the second end of the fourth inductance is connected to the second end of the third inductance, the second end of the second capacitor is connected to the first end of the third inductance, wherein the third inductance The second end is grounded.
The antenna assembly according to any one of claims 1-7, wherein the radio frequency processing circuit comprises:

A plurality of transmitting amplifying units, used to perform power amplification processing on the received second radio frequency signal having multiple frequency bands;

a matching unit connected to the feeding point for impedance matching;

A switch unit, the plurality of first ends of the switch unit are respectively connected to a plurality of emission amplifying units in one-to-one correspondence, and the second end of the switch unit is connected to the matching unit for selectively conducting any of the emission First paths between the amplifying units and the matching units respectively;

The impedance circuit is connected on a second path between the second end of the switch unit and the feeding point.
The antenna assembly according to claim 8, wherein the impedance circuit is connected on a path between the second end of the switch unit and the matching unit.
The antenna assembly according to claim 8, wherein the impedance circuit is connected on a path between the second end of the matching unit and the matching unit.
The antenna assembly according to claim 8, wherein if the preset impedance presents a high impedance in the communication frequency band of the first radio frequency signal, the impedance circuit is connected in series with the second path; if the preset The impedance presents a low impedance in the communication frequency band of the first radio frequency signal, and the impedance circuit is grounded and connected in parallel with the second path.
The antenna assembly according to claim 8, wherein the matching unit includes a radio frequency matching unit and an antenna matching unit to match the input impedance of the antenna terminal and the input impedance of the radio frequency terminal, wherein the antenna terminal and the radio frequency terminal pass through The test sockets in the radio frequency processing circuit are distinguished.
The antenna assembly according to claim 1, wherein the first radio frequency signal includes one of a GPS positioning signal, a Bluetooth signal, and a WiFi signal, and the second radio frequency signal includes 4G LTE signals of multiple frequency bands or includes multiple 5G NR signals in frequency bands.
An electronic device comprising:

The antenna assembly according to any one of claims 1-13;

a conductive frame, the first radiator and the second radiator are formed on the conductive frame;

The substrate is accommodated in the cavity formed by the conductive frame, and the radio frequency processing circuit and the impedance circuit are both arranged on the substrate.
The electronic device according to claim 14, wherein the first radiator and the second radiator share the same conductive frame.
The electronic device according to claim 14, wherein a slit is opened on the conductive frame to separate the conductive frame into an independent first conductor and a second conductor; wherein,

The first radiator is formed on the first conductor, the second radiator is formed on the second conductor, and the second radiator serves as a coupling branch of the first radiator.
The electronic device according to claim 16, wherein the first radiator comprises a first ground terminal and a first free terminal, the second radiator comprises a second ground terminal and a second free terminal, and the The first ground return terminal and the second ground return terminal are respectively electrically connected to the ground layer on the substrate, the first free end and the second free end are oppositely arranged, and the first free end and the second free end A coupling gap is formed between the free ends, and the first radiator and the second radiator are capacitively coupled through the coupling gap.
A wearable device comprising:

Strap components;

The electronic device according to any one of claims 14-17, wherein the strap assembly is used to wear the electronic device at a wearing position of a user.