Antenna Assemblies and Electronic Devices

Abstract

The present application relates to an antenna assembly and an electronic device, wherein the antenna assembly comprises: a conductive frame, having at least one slit, wherein the slit divides the conductive frame into at least a first conductive branch and a second conductive branch, wherein a feeding point is provided on the first conductive branch, and a connection point is provided on the second conductive branch; a resonant circuit, wherein a signal source couples and feeds a current signal to the first conductive branch via the resonant circuit and the feeding point, wherein the current signal couples to the second conductive branch via the slit; a plurality of resonant frequencies are generated on the first conductive branch and the second conductive branch under the resonant regulation of the resonant circuit; and a switching circuit, which is used to switch and regulate the current signal coupled to the second conductive branch, so that a radio frequency signal having a plurality of working frequency bands can be radiated simultaneously on the first conductive branch and the second conductive branch, wherein at least two working frequency bands can be switched, and the space utilization rate of the slit and the conductive frame can be improved without affecting the antenna performance.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] With the development of wireless communication technology, users have higher and higher requirements for the portability and appearance of electronic devices. The antenna of electronic devices with metal frames is mainly based on the metal frame, and the profile height of the metal frame is one of the main factors affecting its radiation efficiency. Among them, the profile height of the metal frame of the electronic device can be understood as the metal width of the metal frame in the thickness direction of the mobile phone. In the trend of pursuing the ultimate mobile phone appearance, the low profile height frame design poses new challenges to antenna performance. Summary of the invention

[0003] The embodiments of the present application provide an antenna assembly and an electronic device, which can improve the space utilization of gaps and conductive frames without affecting the antenna performance.

[0004] An antenna assembly, comprising:

[0005] A conductive frame is provided with at least one slit, wherein the slit divides the conductive frame into at least a first conductive branch and a second conductive branch, wherein a feeding point is provided on the first conductive branch, and a connection point is provided on the second conductive branch;

[0006] A resonant circuit is connected to a signal source and a feeding point respectively, wherein the signal source couples and feeds a current signal to the first conductive branch through the resonant circuit and the feeding point, wherein the current signal couples to the second conductive branch through the gap; and a plurality of resonant frequencies are generated on the first conductive branch and the second conductive branch under the resonance regulation of the resonant circuit;

[0007] The switching circuit is connected to the connection point and the ground terminal respectively, and is used to switch and adjust the current signal coupled to the second conductive branch so that the first conductive branch and the second conductive branch simultaneously radiate radio frequency signals with multiple working frequency bands, wherein at least two of the working frequency bands are switchable.

[0008] An electronic device comprises: a substrate; and the antenna assembly as described above; wherein the substrate is accommodated in a cavity formed by the conductive frame, and the resonant circuit and the signal source module are arranged on the substrate.

[0009] In the above-mentioned antenna assembly and electronic device, the first conductive branch and the second conductive branch share the same gap to simultaneously realize the radiation of the first current signal and the second current signal radio frequency signal, which can improve the space utilization rate of the gap and the conductive frame in the electronic device. At the same time, it is no longer necessary to design the antenna radiator separately, reducing the thickness of the mobile phone. At the same time, the first radiator and the second radiator can be integrated into the top frame or the bottom frame of the electronic device, thereby reducing the pressure of integrating the antenna assembly into the side frame to reduce the cross-sectional height of the side frame. By providing a resonant circuit in the antenna assembly, a first current signal for generating multiple resonant frequencies can be excited on the first conductive branch, so that the first radiator on the first conductive branch can simultaneously radiate a first radio frequency signal with multiple working frequency bands to improve the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 is a schematic diagram of a three-dimensional structure of an electronic device in one embodiment;

[0012] Figure 2 is a first structural schematic diagram of an antenna assembly in an electronic device in an embodiment;

[0013] Figure 3 is a second structural schematic diagram of an antenna assembly in an electronic device in an embodiment;

[0014] Figure 4 is a third structural schematic diagram of an antenna assembly in an electronic device in an embodiment;

[0015] Figure 5 is a fourth structural schematic diagram of an antenna assembly in an electronic device in an embodiment;

[0016] Figure 6 is a fifth structural schematic diagram of an antenna assembly in an electronic device in an embodiment;

[0017] Figure 7a is a schematic diagram of S11 parameter simulation of an antenna assembly in another embodiment;

[0018] Figure 7b is a schematic diagram of efficiency simulation of an antenna assembly in another embodiment;

[0019] Figure 8a A schematic diagram of S11 parameter simulation of an antenna assembly in an embodiment;

[0020] Figure 8b is a schematic diagram of efficiency simulation of an antenna assembly in one embodiment;

[0021] Fig. 9 Schematic diagram of the sixth structure of an antenna assembly in an electronic device in one embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with 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.

[0023] It is understood that the terms "first", "second", etc. used in this application can be used in this article 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 number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] It should be noted that when an element is referred to as being "attached to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0025] The antenna assembly of one embodiment of the present application is applied to an electronic device. In one embodiment, the electronic device may include a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile Internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.) or other communication modules that can be provided with an array antenna assembly.

[0026] like Figure 1 As shown, in the embodiment of the present application, the electronic device 10 may include a conductive frame 110, a back cover, a display screen assembly 120, a substrate 130 and a radio frequency circuit. The display screen assembly 120 is fixed to 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 provide an operation interface for the user.

[0027] The back cover is used to form the outer contour of the electronic device 10. The back cover can be integrally formed. During the molding process of the back cover, structures such as a rear camera hole, a fingerprint recognition module, and an antenna assembly mounting hole can be formed on the back cover. The back cover can be a non-metal back cover, for example, a plastic back cover, a ceramic back cover, a 3D glass back cover, etc.

[0028] In one embodiment, the conductive frame 110 may be a frame structure with through holes. The conductive frame 110 may be made of a metal frame such as aluminum alloy or magnesium alloy.

[0029] In one embodiment, the conductive frame 110 is a rounded rectangular frame, wherein 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, wherein the second frame is connected to the first frame and the third frame respectively. The first frame may be understood as the top frame of the electronic device 10, the third frame may be understood as the bottom frame of the electronic device 10, and the second frame and the fourth frame may be understood as the side frames of the electronic device 10.

[0030] The antenna assembly may be partially or completely formed by a portion of the conductive frame 110 of the electronic device 10. For example, the radiator of the antenna assembly may be partially or integrated in at least one of the top frame, the bottom frame, and the side frame of the electronic device 10.

[0031] The substrate 130 can be accommodated in the accommodation space formed by the conductive frame 110 and the back cover. The substrate 130 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 130, and a controller capable of controlling the operation of the electronic device 10 can also be integrated. The radio frequency circuit includes but is not limited to an antenna assembly, at least one amplifier, a transceiver, a coupler, a low noise amplifier (Low Noise Amplifier, LNA), a duplexer, etc. In addition, the radio frequency circuit 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 the 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 (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE)), email, Short Messaging Service (SMS), etc.

[0032] like Figure 2 As shown, an embodiment of the present application provides an antenna assembly, wherein the antenna assembly includes a conductive frame 110 , a resonant circuit 210 and a signal source 220 .

[0033] The conductive frame 110 is provided with at least one slit 111, and the slit 111 divides the conductive frame 110 into at least an independent first conductive branch 113 and a second conductive branch 115. The first conductive branch 113 is provided with a feeding point S1, and the second conductive branch 115 is provided with a connection point S2.

[0034] In one embodiment, the slot 111 is a part of the antenna assembly, and the slot 111 can be understood as a break, which can divide the conductive frame 110 into at least two independent conductive branches. Exemplarily, one slot 111 is used to divide the conductive frame 110 into an independent first conductive branch 113 and a second conductive branch 115. When the number of slots 111 is N, the conductive frame 110 can be divided into N+1 independent conductive branches.

[0035] In one embodiment, the gap 111 may be filled with air, plastic and / or other dielectrics.

[0036] In one embodiment, the shape of the slot 111 may be straight, or may have one or more curved shapes.

[0037] It should be noted that the slits 111 can be provided at any position of the conductive frame 110. In the embodiment of the present application, the shape, size, number and position of the slits 111 provided at the conductive frame 110 are not further limited.

[0038] The resonant circuit 210 is connected to the signal source 220 and the feed point S1, respectively. The resonant circuit 210 and the signal source 220 can be correspondingly arranged on the substrate 130. The signal source 220 can be used to output a current signal. The signal source 220 couples and feeds a current signal to the first conductive branch 113 through the resonant circuit 210 and the feed point S1, wherein the current signal is coupled to the second conductive branch 115 through the gap 111, and the second conductive branch 115 can be used as a parasitic conductive branch.

[0039] The resonant circuit 210 can filter and tune the received current signal, so that the tuned current signal is fed into the first conductive branch 113 and the second conductive branch 115 to excite multiple resonant frequencies on the first conductive branch 113 and the second conductive branch 115 .

[0040] Furthermore, the resonant circuit 210 can also be used to filter out radio frequency signals other than the frequency corresponding to the current signal, so that the current signal is in a conducting state when flowing through the resonant circuit 210 .

[0041] The switching circuit 230 is connected to the connection point S2 and the ground terminal respectively. The second conductive branch 115 can couple the current signal from the first conductive branch 113 to the second conductive branch 115 by coupling through the gap 11. The switching circuit 230 can switch and adjust the current signal coupled to the second conductive branch 115 so that the first conductive branch 113 and the second conductive branch 115 can simultaneously radiate radio frequency signals with multiple working frequency bands, wherein at least two of the working frequency bands are switchable.

[0042] In the above antenna assembly, the conductive frame 110 is divided into a first conductive branch 113 and a second conductive branch 115 by setting the slit 111 on the conductive frame 110. Multiple resonant frequencies can be excited on the first conductive branch 113 and the second conductive branch 115 through the resonant circuit 210, so that the first conductive branch 113 and the second conductive branch 115 can simultaneously radiate radio frequency signals with multiple working frequency bands, and the two working frequency bands of the radio frequency signal can be switched through the switching circuit 230, thereby realizing the co-aperture antenna design of the dual conductive branches, so that multiple working frequency bands of the radio frequency signal share one slit 111, which can improve the space utilization rate of the slit 111 and the conductive frame 110 in the electronic device 10. At the same time, it is no longer necessary to design the antenna radiator separately, which reduces the thickness of the mobile phone.

[0043] Exemplarily, the first conductive branch 113 and the second conductive branch 115 can be integrated into the first frame or the third frame of the electronic device 10 to improve the utilization rate of the top frame or the bottom frame, thereby reducing the pressure of integrating the antenna assembly into the side frame, so as to reduce the cross-sectional height of the side frame, and the cross-sectional height of the side frame can be reduced to less than 1 mm. Among them, the cross-sectional height of the side frame can be understood as the metal width of the conductive frame 110 in the thickness direction of the electronic device 10, and the cross-sectional height of the conductive frame 110 is one of the main factors affecting its radiation efficiency. In the context of the increasingly larger curvature of the side of the curved screen, even if the antenna clearance of the side frame used to integrate the antenna is greatly reduced, the antenna assembly can be integrated into the top frame or the bottom frame, and it will not affect the flexibility and performance of the antenna assembly.

[0044] In one embodiment, the radio frequency signal may include an LTE signal, a working frequency band of a satellite positioning signal, and a WiFi signal.

[0045] LTE signals can be divided into low frequency signals (Low band, referred to as LB), intermediate frequency signals (Middleband, referred to as MB), and high frequency signals (High band, referred to as HB). In an embodiment of the present application, the LTE signal may include an intermediate frequency signal and a high frequency signal. Among them, the frequency range of the intermediate frequency signal is 1710MHz to 2170MHz, and the frequency range of the high frequency signal is 2300MHz to 2690MHz. Among them, the working frequency band of the intermediate frequency signal may include the B1 band and the B3 band.

[0046] The satellite positioning signal includes at least one of a global positioning system (GPS) signal having a frequency range of 1.2 GHz to 1.6 GHz, a BeiDou Navigation Satellite System (BDS) signal, and a GLONASS signal. In an embodiment of the present application, the operating frequency band of the satellite positioning signal may include an L1 frequency band.

[0047] The operating frequency of the WiFi signal may include 2400MHz-5000MHz. In the embodiment of the present application, the operating frequency band of the WiFi signal may be 2.4G.

[0048] In the embodiment of the present application, under the action of the resonant circuit 210, the current signal is fed into the first conductive branch 113 through the feeding point S1, and after being coupled to the second conductive branch 115 through the gap 111, at least two resonant frequencies resonating in the MHB band of LTE, the L1 band of GPS signals, and the 2.4G band of WIFI signals can be excited in the first conductive branch 113 and the second conductive branch 115, so that the first conductive branch 113 and the second conductive branch 115 can simultaneously radiate the radio frequency signals of the MHB band of LTE signals, the L1 band of GPS signals, and the 2.4G band of WIFI signals. At the same time, by setting the switching circuit 230, the B3 band and the B1 band of the LTE signal can be selected for switching, which improves the efficiency of the intermediate frequency signal while maintaining the coverage of the GPS signal and the WIFI 2.4G band.

[0049] like Figure 3 As shown, in one embodiment, the first conductive branch 113 is further provided with a first feed point G1 , the feed point S1 is arranged in the middle of the first conductive branch 113 , and the first feed point G1 is arranged away from the gap 111 .

[0050] The signal source 220 and the resonant circuit 210 can both be arranged on the substrate 130, and the resonant circuit 210 can be coupled to the first conductive branch 113 through the feeding part 251. The feeding part 251 can be a conductive spring or a screw, and the coupling point between the conductive spring or the screw and the first conductive branch 113 can be used as the feeding point S1. The feeding point S1 can be connected to the resonant circuit 210 through the feeding part 251. The current signal output by the signal source 220 can be fed into the first conductive branch 113 through the feeding point S1 through the resonant circuit 210 by the feeding method of the spring or the screw.

[0051] In one embodiment, the first return point G1 can be connected to the ground layer of the substrate 130 through the first connection part 252 to achieve conduction with the ground. The first connection part 252 can be a conductor such as a spring, a screw, or a flexible circuit board. The first connection part 252 can also be a connecting arm made of the same material as the first conductive branch 113. Exemplarily, the first connection part 252 and the first conductive branch 113 can be integrally formed to simplify the structure of the antenna assembly.

[0052] In one embodiment, the second conductive branch 115 is further provided with a second return point G2, the connection point S2 is arranged in the middle of the second conductive branch 115, and the second return point G2 is arranged away from the gap 111. The conductive frame between the first return point G1 and the second return point G2 can be used as a radiator.

[0053] The switching circuit 230 is also disposed on the substrate 130, and the switching circuit 230 can be coupled to the second conductive branch 115 through the second connection portion 253. The second connection portion 253 can be a conductive spring or a screw, and the coupling point between the conductive spring or the screw and the second conductive branch 115 can serve as the connection point S2. The connection point S2 can be connected to the switching circuit 230 through the second connection portion 253.

[0054] In one embodiment, the second return point G2 can be connected to the ground layer of the substrate 130 through the third connection part 254 to achieve conduction with the ground. The third connection part 254 can be a conductor such as a spring, a screw, or a flexible circuit board. The third connection part 254 can also be a connecting arm made of the same material as the second conductive branch 115. Exemplarily, the third connection part 254 and the second conductive branch 115 can be integrally formed to simplify the structure of the antenna assembly.

[0055] refer to Figure 3 In one embodiment, the resonant circuit 210 includes a low-pass filter circuit, wherein the first conductive branch 113 and the second conductive branch 115 are used to generate two resonant frequencies under the resonance of the resonant circuit 210 .

[0056] In one embodiment, the low-pass filter circuit includes a first capacitor C1 and a first inductor L1, wherein the first end of the first inductor L1 is respectively connected to the first end of the first capacitor C1 and a feeding point S1, and the second end of the first inductor L1 is connected to the signal source 220; the second end of the first capacitor C1 is grounded.

[0057] It should be noted that the low-pass filter circuit can also be composed of other devices and is not limited to the examples in the embodiments of the present application.

[0058] By setting up a resonant circuit 210 in the antenna assembly, a dual resonant frequency can be generated on the first conductive branch 113 and the second conductive branch 115, wherein one resonant frequency is the L1 frequency band of the GPS signal, and the other resonant frequency is the 2.4G frequency band of the WIFI signal or the medium and high frequency signal band of the 5G signal.

[0059] like Figure 4 As shown, in one embodiment, the resonant circuit 210 may include a band-stop and band-pass circuit, wherein three resonant frequencies are excited on the first conductive branch 113 and the second conductive branch 115 under the resonance adjustment of the resonant circuit 210 .

[0060] In one embodiment, the band-stop bandpass circuit includes a second capacitor C2, a third capacitor C3, a second inductor L2 and a third inductor L3, wherein the first end of the second inductor L2 and the first end of the second capacitor C2 are both grounded, the second end of the second inductor L2 is respectively connected to the feeding point S1, the second end of the second capacitor C2, the first end of the third capacitor C3, and the first end of the third inductor L3, and the second end of the third capacitor C3 and the second end of the third inductor L3 are respectively connected to the signal source 220.

[0061] It should be noted that the band-stop and band-pass circuit can also be composed of other devices and is not limited to the examples in the embodiments of the present application.

[0062] By setting up a resonant circuit 210 in the antenna assembly, three resonant frequencies can be generated on the first conductive branch 113 and the second conductive branch 115, wherein one resonant frequency is the L1 frequency band of the GPS signal, one resonant frequency is the medium and high frequency signal band of the LTE signal, and one resonant frequency is the 2.4G frequency band of the WIFI signal.

[0063] like Figure 5 As shown, in one embodiment, the switching circuit 230 includes a switch unit 231 and a plurality of fourth capacitors C4. The switch unit 231 includes a control terminal and a plurality of selection terminals, wherein the control terminal is connected to the connection point S2; and the selection terminal is grounded via the fourth capacitor C4.

[0064] like Figure 6 As shown, in one embodiment, the fourth capacitor of the switching circuit 230 in the above example can be replaced by a fourth inductor. Specifically, the switching circuit 230 may include a switch unit 231 and a plurality of fourth inductors L4. The switch unit 231 includes a control terminal and a plurality of selection terminals, the control terminal is connected to the connection point S2; the selection terminal is grounded via the fourth inductor L4.

[0065] The number of selection terminals of the switch unit 231 can be set according to the number of working frequency bands that can be radiated by the first conductive branch 113 and the second conductive branch 115. Specifically, the switch unit 231 can be a single-pole multi-throw switch, wherein the moving terminal of the single-pole multi-throw switch can be used as the control terminal of the switch unit 231, and the fixed terminal of the single-pole multi-throw switch can be used as the selection terminal of the switch unit 231. Each fixed terminal of the single-pole multi-throw switch is connected to a capacitor, and the capacitance value of each capacitor is different.

[0066] It should be noted that the switch unit 231 may also include multiple single-pole single-throw switches, multiple single-pole double-throw switches, multiple electronic switch tubes, etc. Among them, the electronic switch tube may be a MOS tube, a transistor, etc. In the embodiment of the present application, the specific components of the switch unit 231 are not further limited, and it only needs to meet the switching selection conditions for multiple fourth capacitors or multiple fourth inductors.

[0067] When the first conductive branch 113 and the second conductive branch 115 of the antenna assembly need to radiate radio frequency signals of different working frequency bands, the switch unit 231 can be controlled to select different tuning paths to change the size of the fourth capacitor or the fourth inductor in the tuning path and then adjust the working resonant frequency to achieve switching between different working frequency bands.

[0068] For example, Figure 7a and Figure 7b As shown, by setting a resonant circuit 210 in the antenna assembly, three resonant frequencies can be generated on the first conductive branch 113 and the second conductive branch 115, wherein one resonant frequency is the L1 frequency band of the GPS signal, one resonant frequency is the medium-high frequency signal frequency band of the LTE signal, and one resonant frequency is the 2.4G frequency band of the WIFI signal. The switching circuit 230 can select a tuning path to be turned on, so that the first conductive branch 113 and the second conductive branch 115 can simultaneously radiate the HB frequency band of the LTE signal, the B3 frequency band, the GPS signal, and the WIFI 2.4G frequency band radio frequency signals. Figure 7b The radiation efficiency and system efficiency of each working frequency band of the radio frequency signal radiated by the first conductive branch node 113 and the second conductive branch node 115 both meet the communication requirements.

[0069] For example, Figure 8a and Figure 8bAs shown, by setting a resonant circuit 210 in the antenna assembly, three resonant frequencies can be generated on the first conductive branch 113 and the second conductive branch 115, wherein one resonant frequency is the L1 frequency band of the GPS signal, one resonant frequency is the medium-high frequency signal frequency band of the LTE signal, and one resonant frequency is the 2.4G frequency band of the WIFI signal. The switching circuit 230 can select a tuning path to be turned on, so that the first conductive branch 113 and the second conductive branch 115 can simultaneously radiate the HB frequency band of the LTE signal, the B1 frequency band, the GPS signal, and the WIFI 2.4G frequency band radio frequency signals. Figure 8b The radiation efficiency and system efficiency of each working frequency band of the radio frequency signal radiated by the first conductive branch node 113 and the second conductive branch node 115 both meet the communication requirements.

[0070] It should be noted that the frequency within the range of 7-13% of the resonant frequency can be understood as the working bandwidth of the antenna. For example, if the resonant frequency of the antenna is 1800 MHz and the working bandwidth is 10% of the resonant frequency, the working frequency band of the antenna is 1620 MHz-1980 MHz.

[0071] like Fig. 9 As shown, in one embodiment, a matching circuit 241 for adjusting the first current signal is further provided between the first conductive branch 113 and the signal source 220; wherein the matching circuit 241 can be used to adjust the input impedance of the first radiator to improve the transmission performance of the first radiator.

[0072] Specifically, the matching circuit 241 may include a combination of capacitors and / or inductors, etc. In the embodiment of the present application, the specific composition of the matching circuit 241 is not further limited.

[0073] It should be noted that the feed point S1 can be set at the middle position of the first conductive branch 113 . It can be understood that the specific position of the feed point S1 is associated with the matching circuit 241 , that is, the specific position of the feed point S1 can be set according to the matching circuit 241 .

[0074] In one of the embodiments, the gap 111 is set on the conductive frame 110, so that the conductive frame 110 is divided into a first conductive branch 113 and a second conductive branch 115. The resonant circuit 210 can tune the current signal fed into the first conductive branch 113 and the second conductive branch 115, so as to excite multiple resonant frequencies resonating in the MHB band of LTE, the L1 band of GPS signals and the 2.4G band of WIFI signals in the first conductive branch 113 and the second conductive branch 115, and the two working frequency bands of the radio frequency signal can be switched through the switching circuit 230, thereby realizing the co-caliber antenna design of dual conductive branches, so that GPS, MHB and WIFI signals share one gap, thereby improving the gap and the space utilization of the whole machine.

[0075] In one embodiment, the number of slits provided on the conductive frame is multiple. Exemplarily, two slits are used for illustration. The two slits include a first slit and a second slit, wherein the first slit and the second slit can divide the conductive frame into independent first conductive branches 113, second conductive branches and third conductive branches, wherein a feeding point S1 and a return point can be correspondingly set on the third conductive branch. A third radiator for radiating a third radio frequency signal can be integrated on the third conductive branch. The third radio frequency signal can be a 2G, 3G signal, a 5G signal, a Bluetooth signal, etc.

[0076] Furthermore, each feed point S1 can be connected to the filter circuit via a conductive spring or screw, and connected to the corresponding signal source 220 via its resonant circuit 210. Each signal source 220 can feed the current signal to the corresponding conductive branch through the resonant circuit 210, the conductive spring or screw, and the feed point S1, so that a quarter or other mode of current is excited on the conductive branch (radiator) between the gap and the return point, thereby generating radiation, that is, radiating different radio frequency signals.

[0077] By analogy, when N (N>2) gaps 111 are provided on the conductive frame 110, the conductive frame 110 can be divided into N+1 independent conductive branches, and N+1 resonant circuits 210 and signal sources 220 can be provided accordingly. N+1 radiators can also be integrated on the N+1 independent conductive branches accordingly to radiate N+1 radio frequency signals, and each radio frequency signal has a different operating frequency band.

[0078] An embodiment of the present application also provides an electronic device 10, which includes a substrate 130 and an antenna assembly as in any of the above embodiments; wherein the substrate 130 is accommodated in a cavity formed by the conductive frame 110, and the resonant circuit 210 and the signal source 220 are arranged on the substrate 130.

[0079] When the antenna assembly is used in the electronic device 10, the first conductive branch 113 and the second conductive branch 115 share the same slot 111 to simultaneously radiate radio frequency signals of multiple different operating frequency bands, thereby improving the space utilization of the slot 111 and the conductive frame 110 in the electronic device 10. At the same time, it is no longer necessary to design an antenna radiator separately, thereby reducing the thickness of the mobile phone.

[0080] For example, due to the use of a common-aperture antenna design, GPS, MHB and WIFI share a gap, so that the first radiator and the second radiator can be integrated into the first frame or the third frame of the electronic device 10 to improve the utilization of the top frame or the bottom frame, thereby reducing the pressure of integrating the antenna assembly into the side frame to reduce the cross-sectional height of the side frame, and the cross-sectional height of the side frame can be reduced to less than 1 mm. Among them, the cross-sectional height of the side frame can be understood as the metal width of the conductive frame 110 in the thickness direction of the electronic device 10, and the cross-sectional height of the conductive frame 110 is one of the main factors affecting its radiation efficiency. As the curvature of the side of the curved screen becomes larger and larger, the cross-sectional height of the side frame is limited, thereby greatly reducing the antenna clearance. By adopting the co-aperture antenna design provided in the embodiment of the present invention, the antenna component can be integrated in the top frame or the bottom frame to ensure that the antenna has sufficient clearance, and by arranging a resonant circuit 210 and a switching circuit 230 in the antenna component, multiple resonant frequencies can be excited on the first conductive branch node 113 and the second conductive branch node, so that the first conductive branch node 113 and the second conductive branch node can simultaneously radiate radio frequency signals with multiple operating frequency bands, and the two operating frequency bands of the radio frequency signal can be switched through the switching circuit 230, so that the design requirements of multiple frequency bands and multiple antennas are met under the limited radiator length of the top or bottom frame.

[0081] Any reference to memory, storage, database or other medium used in this application may include non-volatile and / or volatile memory. Suitable non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0082] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0083] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An antenna assembly, characterized in that: include: A conductive frame is provided with at least one slit, wherein the slit divides the conductive frame into at least a first conductive branch and a second conductive branch, wherein a feeding point is provided on the first conductive branch, and a connection point is provided on the second conductive branch; A resonant circuit is connected to a signal source and a feeding point respectively, wherein the signal source couples and feeds a current signal to the first conductive branch through the resonant circuit and the feeding point, wherein the current signal couples to the second conductive branch through the gap; the resonant circuit comprises a band-stop and band-pass circuit, wherein three resonant frequencies are generated on the first conductive branch and the second conductive branch under the resonance regulation of the resonant circuit; wherein one resonant frequency is the L1 frequency band of the GPS signal, one resonant frequency is the medium and high frequency signal frequency band of the LTE signal, and one resonant frequency is the 2.4G frequency band of the WIFI signal; The switching circuit is connected to the connection point and the ground terminal respectively, and is used to switch and adjust the current signal coupled to the second conductive branch so that the first conductive branch and the second conductive branch simultaneously radiate radio frequency signals with multiple working frequency bands, wherein at least two of the working frequency bands are switchable.

2. The antenna assembly according to claim 1, characterized in that: The band-stop bandpass circuit includes a second capacitor, a third capacitor, a second inductor and a third inductor, wherein the first end of the second inductor and the first end of the second capacitor are both grounded, the second end of the second inductor is respectively connected to the feed point, the second end of the second capacitor, the first end of the third capacitor, and the first end of the third inductor, and the second end of the third capacitor and the second end of the third inductor are respectively connected to the signal source.

3. The antenna assembly according to claim 1, characterized in that: The switching circuit comprises: A plurality of fourth capacitors, The switch unit comprises a control end and a plurality of selection ends, wherein the control end is connected to the connection point; and the selection end is grounded via the fourth capacitor.

4. The antenna assembly according to claim 1, characterized in that: The switching circuit comprises: Multiple fourth inductors, The switch unit comprises a control end and a plurality of selection ends, wherein the control end is connected to the connection point; and the selection end is grounded via the fourth inductor.

5. The antenna assembly according to claim 1, characterized in that: The first conductive branch is also provided with a first return point, the feeding point is arranged in the middle position of the first conductive branch, and the first return point is arranged away from the gap; the second conductive branch is also provided with a second return point, the connection point is arranged in the middle position of the second conductive branch, and the second return point is arranged away from the gap.

6. The antenna assembly according to claim 5, characterized in that: The first return point is connected to the ground layer of the substrate through a first connection part; the second return point is connected to the ground layer of the substrate through a third connection part.

7. The antenna assembly according to claim 1, characterized in that: A matching circuit for adjusting impedance is also provided between the feeding point and the signal source.

8. The antenna assembly according to claim 7, characterized in that: The matching circuit includes a capacitor and / or an inductor.

9. The antenna assembly according to claim 1, characterized in that: The two switchable operating frequency bands include the B1 band and the B3 band.

10. An electronic device, characterized in that: include: substrate; And the antenna assembly as described in any one of claims 1-9; wherein the substrate is accommodated in a cavity formed by the conductive frame, and the resonant circuit and the signal source are arranged on the substrate.

Images