Antenna assembly, electronic device, and wearable device

Abstract

The present application relates to an antenna assembly, an electronic device, and a wearable device. The antenna assembly includes: a first radiator configured to radiate 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 and configured to feed an excitation signal to the feeding point so that the second radiator radiates a second radio frequency signal of a second communication standard; and an impedance circuit connected to the radio frequency processing circuit and configured to provide a preset impedance to stabilize the total impedance of the impedance generated on the radio frequency processing circuit and the preset impedance within a preset range. It can ensure that when the radio frequency processing circuit processes the second radio frequency signal (for example, handover processing 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, and while radiating the first radio frequency signal and the second radio frequency signal, the stability of the radiation of the first radio frequency signal can be ensured to improve the radiation performance.

Description

Technical Field

[0001] This application relates to the field of antenna technologies, and in particular, to an antenna assembly, an electronic device, and a wearable device. Background Art

[0002] With the development of wireless communication technologies, users have increasingly higher requirements for the portability and appearance of electronic devices. The antennas of electronic devices with metal frames are mainly implemented based on the metal frames. Generally, multiple antennas (for example, a GPS antenna and an LTE antenna) are provided in an electronic device to radiate radio frequency signals of different communication systems. However, when one antenna is operating, it will affect the radiation performance of another antenna. For example, during the operation of the LTE antenna, it will affect the radiation performance of the GPS antenna for radiating GPS signals. Summary of the Invention

[0003] Embodiments of this application provide an antenna assembly, an electronic device, and a wearable device, which can ensure the stability of the radiation of a first radio frequency signal while radiating a first radio frequency signal and a second radio frequency signal, so as to improve the radiation performance of the first radio frequency signal.

[0004] In a first aspect, an embodiment of this application provides an antenna assembly, including:

[0005] A first radiator, configured to radiate a first radio frequency signal of a first communication system;

[0006] A second radiator, provided with a feeding point;

[0007] A radio frequency processing circuit, connected to the feeding point, configured to feed an excitation signal to the feeding point, so that the second radiator radiates a second radio frequency signal of a second communication system;

[0008] An impedance circuit, connected to the radio frequency processing circuit, configured to provide a preset impedance to stabilize the total impedance of the impedance generated on the radio frequency processing circuit and the preset impedance within a preset range, where the frequency band ranges of the first radio frequency signal and the second radio frequency signal are different.

[0009] In a second aspect, an embodiment of this application provides an electronic device, including:

[0010] The foregoing antenna assembly;

[0011] A conductive frame, on which the first radiator and the second radiator are formed;

[0012] A substrate, accommodated in a cavity formed by enclosing the conductive frame, where the radio frequency processing circuit and the impedance circuit are both disposed on the substrate.

[0013] In a third aspect, an embodiment of this application provides a wearable device, including:

[0014] Strap assembly;

[0015] The aforementioned electronic device, and the strap assembly is used to wear the electronic device at the user's wearing position.

[0016] The above antenna assembly, electronic device and wearable device include a first radiator for radiating a first radio frequency signal of a first communication system; a second radiator provided with a feeding point; a radio frequency processing circuit connected to the feeding point for feeding an excitation signal to the feeding point to enable the second radiator to radiate a second radio frequency signal of a second communication system; and an impedance circuit connected to the radio frequency processing circuit for providing a preset impedance to stabilize the total impedance of the impedance generated on the radio frequency processing circuit and the preset impedance within a preset range. Therefore, it can be ensured that when the radio frequency processing circuit processes the second radio frequency signal (for example, the switching process 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, thereby reducing the degree of performance change caused by the radiation of the first radio frequency signal when the radio frequency processing circuit processes the second radio frequency signal. During the processing of the second radio frequency signal (for example, the switching between different frequency bands to achieve network search), the stability of the radiation of the first radio frequency signal can be improved to improve the radiation performance of the first radio frequency signal, and further improve the communication performance of the antenna assembly. Description of the Drawings

[0017] 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 required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic three-dimensional structure diagram of a wearable device in an embodiment;

[0019] Figure 2 It is a first schematic structural diagram of an antenna assembly in an embodiment;

[0020] Figure 3 It is a schematic circuit diagram of the impedance circuit and the radio frequency processing circuit of the antenna assembly in an embodiment;

[0021] Figure 4 It is a schematic circuit diagram of the impedance circuit and the radio frequency processing circuit of the antenna assembly in another embodiment;

[0022] Figure 5 It is a schematic circuit diagram of the impedance circuit and the radio frequency processing circuit of the antenna assembly in yet another embodiment;

[0023] Figure 6 Schematic circuit diagram of the antenna component impedance circuit and the radio frequency processing circuit in yet another embodiment;

[0024] Figure 7 Curve graph of impedance change during the switching process of the switch unit in one embodiment;

[0025] Figure 8 Schematic circuit diagram of the impedance circuit in one embodiment;

[0026] Figure 9 Schematic circuit diagram of the impedance circuit in another embodiment;

[0027] Figure 10 Schematic structural diagram of the antenna component in another embodiment;

[0028] Figure 11 Schematic circuit diagram of the impedance circuit in yet another embodiment;

[0029] Figure 12 Schematic circuit diagram of the impedance circuit in yet another embodiment;

[0030] Figure 13 Schematic structural diagram of the antenna component in yet another embodiment;

[0031] Figure 14 Schematic structural diagram of the antenna component in yet another embodiment;

[0032] Figure 15 Schematic diagram of the frame structure of the wearable device in one embodiment. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It can be understood that the terms "first", "second", etc. used in the present application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. For example, without departing from the scope of the present application, the first radiator may be referred to as the second radiator, and similarly, the second radiator may be referred to as the first radiator. Both the first radiator and the second radiator are light-emitting components, but they are not the same light-emitting component.

[0035] Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] It should be noted that when an element is referred to as "adhered to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0037] Please refer to Figure 1 and Figure 2 together. Figure 1 is a schematic three-dimensional structure diagram of a wearable device in an embodiment of the present application. Figure 2 is a first schematic structure diagram of an antenna assembly in an embodiment of the present application. As Figure 1 shown, in one embodiment, the wearable device 10 includes an electronic device 100 and a strap assembly 200. The electronic device 100 is installed 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 the user's wearing position, for example, wearing positions such as the wrist, ankle, head, etc. In one embodiment, the wearable device 10 is a smart watch, a smart bracelet, a pedometer, etc.

[0038] As Figure 2 shown, the electronic device 100 includes a conductive frame 110, a rear cover, a display screen 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 rear 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 images or fonts and can provide an operation interface for the user.

[0039] In one embodiment, the conductive frame 110 can be a frame structure with through holes. The material of the conductive frame 110 can include metal frames such as aluminum alloy and magnesium alloy.

[0040] In one embodiment, the conductive frame 110 is a rounded rectangular frame. Among them, the conductive frame 110 can include a first frame and a third frame arranged opposite to each other, a second frame and a fourth frame arranged opposite to each other. Among them, the second frame is respectively connected to the first frame and the third frame. Among them, 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.

[0041] The antenna assembly can 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 can be partially or integrated in at least one of the top frame, bottom frame, and side frames of the electronic device 100.

[0042] The substrate 120 can be received in the receiving space formed by the conductive frame 110 and the rear cover. The substrate 120 can be a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit). Part of the radio frequency circuit for processing radio frequency signals can be integrated on the substrate 120, and a controller capable of controlling the operation of the electronic device 100 can also be integrated.

[0043] In one embodiment, the side surface of the conductive frame 110 can be provided with a mating structure for mounting the strap assembly 200. The strap assembly 200 can form a reliable connection with the conductive frame 110 through the mating structure of the conductive frame 110 to reliably wear the electronic device 100 on the user's hand. In one embodiment, the strap assembly 200 can also be detached from the conductive frame 110 relatively conveniently, enabling the user to easily replace the strap assembly 200. For example, the user can purchase various styles of strap assemblies 200 and replace the strap assembly 200 according to the usage scenario to improve the convenience of use. For example, the user can use a more formal strap assembly 200 on formal occasions and a casual style strap assembly 200 on occasions of leisure and entertainment.

[0044] Please continue to refer to Figure 2 , this embodiment of the present application provides an antenna assembly. Specifically, the antenna assembly can include a first radiator 111, a second radiator 113, a radio frequency processing circuit 130, and an impedance circuit 140. Among them, both the first radiator 111 and the second radiator 113 are formed on the conductive frame 110.

[0045] Among them, the first radiator 111 can be used to radiate the first radio frequency signal of the first communication system. Further, a feeding point S1 for connecting to a signal source 101 and a grounding point G1 for connecting to a reference ground electrode can also be provided on the first radiator 111. 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 receive and transmit the first radio frequency signal.

[0046] The second radiator 113 is provided with a feeding point S2 for feeding an excitation signal into the second radiator 113. Among them, the radio frequency processing circuit 130 is connected to the feeding point S2 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 system. Further, a grounding point (not shown in the figure) is also provided on the second radiator 113 for connecting to the reference ground electrode. Among them, the reference ground electrode electrically connected to the first radiator 111 and the reference ground electrode electrically connected to the second radiator 113 can be the same reference ground electrode.

[0047] The radio frequency processing circuit 130 includes but is not limited to at least one amplifier, coupler, low noise amplifier (LNA), duplexer, etc. 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 (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0048] Among them, the resonance frequencies of the first radio frequency signal and the second radio frequency signal are different, that is, the communication frequency band ranges of the first radio frequency signal and the second radio frequency signal are different. In the embodiments of the present application, the first communication system can be a GPS communication system, a Bluetooth communication system, or a WiFi communication system; 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; the second communication system can be a GPS communication system, a Bluetooth communication system, or a WiFi communication system. In the following embodiments, it is described by taking the first communication system as a GPS communication system and the second communication system as a 4G LTE communication system as an example. Specifically, the first radio frequency signal is a GPS signal. For example, the first radio frequency signal can include at least one of the GPS signals in the L1 frequency band and the GPS signals in the L5 frequency band. The second radio frequency signal can be an LTE signal. For example, the second radio frequency signal can include at least two of B1, B3, B5, B8, B38, B39, and B40.

[0049] In the related art, when the first radiator 111 and the second radiator 113 work simultaneously, the working frequency band of the second radiator 113 does not include the working frequency band of the first radiator 111 (for example, 1575 MHz). For the first radiator 111, the second radiator 113 is equivalent to a ground with a certain impedance at the 1575 MHz frequency point. Therefore, the feeding point S2 of the second radiator 113 can be understood as a ground point of the first radiator 111, that is, the radio frequency processing circuit 130 connected to the feeding point S2 on the second radiator 113 is equivalent to an impedance ground pin L of the first radiator 111. When the radio frequency processing circuit 130 is working, the radio frequency processing circuit 130 will generate some changing impedances, and the changing impedance will affect the radiation of the GPS signal by the first radiator 111, and further affect the performance of the first radiator 111 in radiating the first radio frequency signal.

[0050] Based on this, in the antenna assembly in the embodiments of the present application, an impedance circuit 140 is connected to the radio frequency processing circuit 130. The impedance circuit 140 is used to provide a preset impedance 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 centered on a fixed value with a preset variable as the floating range. The preset variable can be impedance values such as 0, 1, etc. The total impedance specifically includes the sum of the first impedance generated during the operation of the radio frequency circuit and the preset impedance. The first impedance, for example, may include the inherent impedance during operation and the varying impedance brought about during operation. It should be noted that the inherent impedance and the varying impedance will be described in the following embodiments and will not be elaborated here.

[0051] 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 stabilized within the preset range, it can ensure that the overall impedance of the ground pin L is a stable value, thereby ensuring the stability of the first radiator 111 radiating the first radio frequency signal and improving the performance of radiating the first radio frequency signal.

[0052] As Figure 3 and Figure 4 shown, in one of the embodiments, the radio frequency processing circuit may include a plurality of transmitting and amplifying units 131, a matching unit 132, and a switching unit 133. The transmitting and amplifying unit 131 is used to perform power amplification processing on the received second radio frequency signal with multiple frequency bands. Exemplarily, as Figure 5 and Figure 6 shown, the transmitting and amplifying unit 131 may include a power amplifier 1311, which can support power amplification of second radio frequency signals with different frequency bands. The number of the transmitting and amplifying units 131 can be set according to the frequency bands included in the second radio frequency signal. For the convenience of description, six power amplifiers 1311 can be set, which can respectively implement the amplification processing of the second radio frequency signals in the B38, B1 or B3, B39, B5, B8, B40 frequency bands.

[0053] Further, the transmitting and amplifying unit 131 further includes a plurality of filtering units 1312 respectively connected to the output ends of the power amplifiers 1311 to support the filtering processing of the second radio frequency signals in each frequency band. The number of the filtering units 1312 can be equal to the number of the power amplifiers 1311, and each of the filtering units 1312 can correspondingly output the second radio frequency signals in the 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 of the filtering units 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 LET signals in other frequency bands.

[0054] The matching unit 132 is connected to the feeding point S2 and is used 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 at the antenna end and the input impedance at the radio frequency end are 50 ohms, thereby improving the transmission performance of the second radiator 113. Among them, the antenna end and the radio frequency end can be distinguished by the test socket 134 in the radio frequency processing circuit 130. Specifically, from the test socket 134 to the transmitting and amplifying unit 131 side, it can be understood as the radio frequency end; from the test socket 134 to the second radiator 113, it can be understood as the antenna side.

[0055] Specifically, the radio frequency matching unit 1321 and the antenna matching unit 1322 respectively include combinations of capacitors and / or inductors, etc. In the embodiments of the present application, the specific composition forms of the radio frequency matching unit 1321 and the antenna matching unit 1322 are not further limited.

[0056] The switch unit 133, a plurality of first ends of the switch unit 133 are respectively connected to a plurality of transmitting and amplifying units 131 in one-to-one correspondence, and a second end of the switch unit 133 is connected to the matching unit 132, and is used to selectively conduct a first path between any one of the transmitting and amplifying units 131 and the matching unit 132. Among them, the number of the first ends of the switch unit 133 is equal to the number of the transmitting and amplifying units 131. For example, the switch unit 133 can be an SPnT switch, where n is the number of the first ends of the switch unit 133. If the radio frequency processing circuit 130 includes six transmitting and amplifying units 131, then the switch unit 133 may include six first ends and one second end. Exemplarily, the switch unit 133 can be an SP6T switch. When it is necessary to work in the 4G LTE cellular network, the switch unit 133 will perform a state switch to search for networks in different frequency bands. That is, the switch unit 133 switches to different transmitting and amplifying units 131 to perform target frequency band switching, so that the second radiator 113 can support the transmission of the second radio frequency signal in the target frequency band. Among them, the target frequency band is one of the B38, B1 or B3, B39, B5, B8, B40 frequency bands.

[0057] The impedances of the matching unit 132, the power amplifier 1311 in the radio frequency processing circuit 130, and the radio frequency traces for connecting each device are all inherent properties of the devices. Therefore, the impedance of this part can be called the inherent impedance of the radio frequency processing circuit 130. The switch unit 133 in the radio frequency processing circuit 130 can realize the switching between multiple transmitting and amplifying units 131. When switching between multiple transmitting and amplifying units 131, the impedance of its radio frequency circuit will change with the switching of the switch unit 133, as Figure 7 shown, and the corresponding change amount can be called the transformation impedance of the radio frequency circuit.

[0058] Among them, the impedance circuit 140 is connected to a 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 changing impedance generated during the switching process of the switch unit 133 and the inherent impedance of the radio frequency processing circuit 130, so as to use the preset impedance, the changing impedance, and the inherent impedance as the overall impedance of the ground pin L. Therefore, the overall impedance can be stabilized within a preset range to ensure the performance of radiating the first radio frequency signal.

[0059] Specifically, the impedance circuit 140 can be arranged at 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, or can be arranged between the matching unit 132 and the feeding point, or can be arranged between the radio frequency matching unit 1321 and the test socket 134, etc. For the convenience of description, in all the following embodiments, it is taken as an example that the impedance circuit 140 is arranged between the second end of the switch unit 133 and the matching unit 132 for description.

[0060] Please continue to refer to Figure 3 and Figure 5 In one embodiment, the impedance circuit 140 is connected in series with the radio frequency processing circuit 130, and the impedance circuit 140 presents a high impedance in the communication frequency band of the first radio frequency signal (for example, the GPS frequency band). That is to say, the impedance circuit 140 can present a high impedance at the 1575 MHz frequency point.

[0061] As Figure 8 shown, the impedance circuit 140 can include a first capacitor C1 and a first inductor L1 connected in parallel. Among them, 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. Among them, 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, the 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.

[0062] As Figure 9As shown, in one embodiment, the impedance circuit 140 includes a first capacitor C1, a first inductor L1, and a second inductor L2 connected in series. The first end of the second inductor L2 is connected to the second end of the first capacitor C1 and the second end of the first inductor L1, respectively, and the second end of the second inductor L2 is connected to the second end of the switch unit 133. By adjusting the capacitance value of the first capacitor C1, the inductance values of the first inductor L1 and the second inductor L2, the band-stop 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 (e.g., the GPS frequency band).

[0063] As Figure 10 shown, when the switch unit 133 is switched, by connecting an impedance circuit 140 with a high impedance in the communication frequency band of the first radio frequency signal (e.g., the GPS frequency band) in series at the front end of the switch unit 133, even if the impedance seen from the switch unit 133 towards the radio frequency direction (as shown by the dotted arrow in the figure) changes due to the switching of the switch unit 133, however, the impedance seen from the impedance circuit 140 towards the radio frequency direction (as shown by the solid arrow in the figure) remains a high impedance. Therefore, the overall impedance of the radio frequency processing circuit 130 and the impedance circuit 140 can be stabilized within a preset range, thereby ensuring the stable performance of the GPS antenna. The overall impedance of the radio frequency processing circuit 130 and the impedance circuit 140 can be equivalent to the overall impedance of the grounding pin L. The radio frequency direction can be understood as the direction from the feeding point to the transmitting and amplifying unit 131, for example, the direction from the feeding point to the power amplifier 1311.

[0064] Please continue to view Figure 4 and Figure 6 In one embodiment, the impedance circuit 140 is connected in parallel with the radio frequency processing circuit 130 and grounded, and the impedance circuit 140 presents a low impedance in the communication frequency band of the first radio frequency signal (e.g., the GPS frequency band). That is, the impedance circuit 140 can present a low impedance at the 1575 MHz frequency point.

[0065] As Figure 11 shown, in one embodiment, the impedance circuit 140 includes 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. By adjusting the capacitance value of the second capacitor C2 and the inductance value of the third inductor L3, the band-pass frequency band (e.g., the GPS frequency band) of the impedance circuit 140 can be adjusted so that the impedance circuit 140 presents a low impedance state in the band-pass frequency band.

[0066] As Figure 12As shown, in one embodiment, the impedance circuit 140 includes a second capacitor C2, a third inductor L3 and a fourth inductor L4. The fourth inductor L4 can be arranged 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. By adjusting the capacitance of the second capacitor C2, the inductance of the third inductor L3 and the fourth inductor L4, the passband frequency band (for example, GPS frequency band) of the impedance circuit 140 can be adjusted so that the impedance circuit 140 presents a low impedance state in the passband frequency band.

[0067] like Figure 13 As shown, when the switch unit 133 is switched, an impedance circuit 140 exhibiting low impedance in the communication frequency band of the first RF signal (for example, the GPS frequency band) is connected in parallel to the front end of the switch unit 133. Even if the switching of the switch unit 133 causes the impedance viewed from the switch unit 133 in the RF direction (as shown by the dotted arrow in the figure) to change, the impedance viewed from the impedance circuit 140 in the RF direction (as shown by the solid arrow in the figure) is still low impedance. Therefore, the overall impedance of the RF processing circuit 130 and the impedance circuit 140 can be stabilized within a preset range, thereby ensuring the stability of the GPS antenna performance.

[0068] Optionally, the impedance circuit 140 may also be an integrated circuit (IC) module integrated with capacitors, inductors or other devices. In the embodiment of the present application, the specific composition of the impedance circuit 140 is not further limited and may not be limited to the examples in the above embodiment.

[0069] Please continue to refer to Figure 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 can serve as both the first radiator 111 and the second radiator 113.

[0070] like Figure 14As shown, optionally, the conductive frame 110 may also be provided with a slit 102, which divides the conductive frame 110 into an independent first conductor and a second conductor. Among them, 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 stub of the first radiator 111. Specifically, the first radiator 111 includes a first ground end G1 and a first free end F1, and the second radiator 113 includes a second ground end G2 and a second free end F2. The first ground end G1 and the second ground end G2 are respectively electrically connected to the ground layer on the substrate. The first free end F1 and the second free end F2 are arranged opposite to each other. Among them, a coupling slit 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 slit. Further, the feeding point S1 on the first radiator 111 can be set between the first ground end G1 and the first free end F1, and the feeding point S2 on the second radiator 113 can be set between the second ground end G2 and the second free end F2.

[0071] In one embodiment, the feeding points on the first radiator 111 and the second radiator 113 can be connected to their respective signal sources through a feeding part. Among them, the feeding part can be a conductive elastic sheet or a screw. Among them, the conductive elastic sheet or the screw and the coupling points on the first radiator 111 and the second radiator 113 can be used as the feeding points S1 and S2. Among them, the first excitation signal output by the signal source 101 can feed the first excitation signal into the first radiator 111 through the feeding points S1 in the feeding manner of the elastic sheet or the 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 radio frequency processing circuit 130 can feed the second excitation signal into the second radiator 113 through the feeding points S2 in the feeding manner of the elastic sheet or the screw, so as to excite a second radio frequency signal for generating a resonant frequency on the second radiator 113.

[0072] In one embodiment, the ground 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 a connecting part to achieve conduction with the ground. Among them, the connecting part can be a conductive body such as an elastic sheet or a screw, or a flexible circuit board. The connecting part can also be a connecting arm made of the same material as the radiator. Exemplarily, the connecting part can be integrally formed with the first radiator 111 and the second radiator 113 to simplify the structure of the antenna assembly.

[0073] As Figure 15 shown, further, taking the wearable device as a smart watch as an example for illustration. Specifically, as Figure 15As shown, the smartwatch may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device 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 can understand that Figure 15 the smartwatch shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have a different component arrangement. Figure 15 The various components shown 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.

[0074] The memory 21 optionally includes high-speed random access memory and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, 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, etc.

[0075] The processor 22 and other control circuits (such as the control circuit in the radio frequency component 24) can be used to control the operation of the smartwatch. The processor 22 can be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.

[0076] The processor 22 can be configured to implement a control algorithm for controlling the use of the antenna in the smartwatch. The processor 22 can also issue control commands for controlling various switches in the radio frequency component 24, etc.

[0077] The I / O subsystem 26 couples input / output peripheral devices on the smartwatch, such as a keypad and other input control devices, to the peripheral device interface 23. The I / O subsystem 26 optionally includes a touch screen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, a data port, etc. Exemplarily, a user can control the operation of the smartwatch by supplying commands via the I / O subsystem 26, and can use the output resources of the I / O subsystem 26 to receive status information and other outputs from the smartwatch. For example, when the user presses the button 261, the mobile phone can be started or shut down.

[0078] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0079] The embodiments described above only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An antenna assembly, characterized in that, Comprising: A first radiator for radiating a first radio frequency signal of a first communication system; A second radiator provided with a feeding point; A radio frequency processing circuit connected to the feeding point for feeding an excitation signal to the feeding point to cause the second radiator to radiate a second radio frequency signal of a second communication system; An impedance circuit connected to the radio frequency processing circuit for providing a preset impedance to stabilize the total impedance of a first impedance generated on the radio frequency processing circuit and the preset impedance within a preset range, wherein the frequency band ranges of the first radio frequency signal and the second radio frequency signal are different, and the first impedance includes an inherent impedance during operation and a variable impedance brought about by the operation of the radio frequency processing circuit; The impedance circuit is connected in series with the radio frequency processing circuit, and the impedance circuit presents a high impedance in the communication frequency band of the first radio frequency signal; or, The impedance circuit is grounded and connected in parallel with the radio frequency processing circuit, and the impedance circuit presents a low impedance in the communication frequency band of the first radio frequency signal.

2. The antenna assembly according to claim 1, wherein The impedance circuit includes a first capacitor and a first inductor connected in parallel; wherein, a first end of the first capacitor is connected to a first end of the first inductor, and a second end of the first capacitor is connected to a second end of the first inductor.

3. The antenna assembly according to claim 2, wherein The impedance circuit further includes: a second inductor, wherein a first end of the second inductor is electrically connected to a connection node of the second end of the first capacitor and the second end of the first inductor, and a second end of the second inductor is connected to the radio frequency processing circuit.

4. The antenna assembly according to claim 1, wherein The impedance circuit includes a second capacitor and a third inductor connected in series; wherein, a first end of the second capacitor is connected to the radio frequency processing circuit, a second end of the second capacitor is connected to a first end of the third inductor, and a second end of the third inductor is grounded.

5. The antenna assembly according to any one of claims 1-4, characterized in that The radio frequency processing circuit includes: A plurality of transmitting and amplifying units for performing 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 switching unit, a plurality of first ends of the switching unit are respectively connected to the plurality of transmitting and amplifying units in one-to-one correspondence, and a second end of the switching unit is connected to the matching unit for selectively conducting a first path between any one of the transmitting and amplifying units and the matching unit; The impedance circuit is connected to a second path between the second end of the switching unit and the feeding point.

6. The antenna assembly according to claim 5, characterized in that, The impedance circuit is disposed between the switching unit and the matching unit.

7. The antenna assembly according to claim 5, characterized in that, The impedance circuit is disposed between the matching unit and the feeding point.

8. The antenna assembly according to claim 5, 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 impedance presents a low impedance in the communication frequency band of the first radio frequency signal, the impedance circuit is grounded and connected in parallel with the second path.

9. 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 5G NR signals of multiple frequency bands.

10. An electronic device, characterized in that, Comprising: The antenna assembly according to any one of claims 1-9; A conductive frame, on which the first radiator and the second radiator are formed; A substrate, accommodated in a cavity formed by enclosing the conductive frame, and the radio frequency processing circuit and the impedance circuit are both disposed on the substrate.

11. A wearable device, characterized in that, Comprising: A strap assembly; The electronic device according to claim 10, wherein the strap assembly is configured to wear the electronic device at a wearing position of a user.

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