Antenna Assembly and Electronic Device

Abstract

The present application provides an antenna assembly and an electronic device. The antenna assembly includes a first antenna and a second antenna; the first antenna includes a first radiator, a first matching circuit and a first signal source, and the first signal source is electrically connected to the first radiator through the first matching circuit; the second antenna includes a second radiator, a second matching circuit and a second signal source, one end of the second radiator is grounded, the other end forms a coupling gap with one end of the first radiator, the other end of the first radiator is grounded, the second signal source is electrically connected to the second radiator through the second matching circuit, the second matching circuit includes a frequency selection filtering sub-circuit and a band-pass sub-circuit, one end of the frequency selection filtering sub-circuit is electrically connected to the connection point of the second radiator, and the other end is grounded; one end of the band-pass sub-circuit is electrically connected to the connection point, and the other end is electrically connected to the second signal source; the first antenna supports the first and second frequency bands, and the second antenna supports the third frequency band. The antenna assembly of the present application has a good communication effect.

Description

Technical Field

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

[0002] With the development of technologies, electronic devices with communication functions such as mobile phones have become more and more popular and have more and more powerful functions. An antenna assembly is usually included in an electronic device to implement the communication function of the electronic device. However, the communication performance of the antenna assembly in the related art electronic devices is not good enough and there is still room for improvement. Summary of the Invention

[0003] In a first aspect, this application provides an antenna assembly. The antenna assembly includes:

[0004] A first antenna, the first antenna includes a first radiator, a first matching circuit and a first signal source, the first radiator has a first grounding end and a first free end, the first grounding end is grounded, and the first signal source is electrically connected to the first radiator through the first matching circuit; and

[0005] A second antenna, the second antenna includes a second radiator, a second matching circuit and a second signal source, the second radiator has a second grounding end and a second free end, the second grounding end is grounded, the second free end is spaced from the first free end and forms a coupling gap, the second radiator is coupled to the first radiator through the coupling gap, the second signal source is electrically connected to the second radiator through the second matching circuit, the second radiator further has a connection point, the second matching circuit includes a frequency selection filtering sub-circuit and a band-pass sub-circuit, one end of the frequency selection filtering sub-circuit is electrically connected to the connection point, the other end is grounded, the frequency selection filtering sub-circuit is a band-stop circuit for a third frequency band and a band-pass circuit for a second frequency band; one end of the band-pass sub-circuit is electrically connected to the connection point, the other end is electrically connected to the second signal source, and the band-pass sub-circuit is a band-pass circuit for the third frequency band;

[0006] The first antenna is used to support a first frequency band and a second frequency band, and the second antenna is used to support a third frequency band.

[0007] In a second aspect, this application further provides an electronic device, the electronic device includes the antenna assembly as described in the first aspect, the electronic device has a top and a bottom, and both the first radiator and the second radiator are disposed on the top.

[0008] The antenna assembly provided by the embodiment of the present application has the second free end and the first free end arranged at intervals to form a coupling gap, so that when the first antenna works, it can utilize not only the first radiator but also the second radiator, enabling the first antenna to support the first frequency band and the second frequency band. Therefore, the antenna assembly has a better communication effect. Correspondingly, when the second antenna works, it can utilize not only the second radiator but also the first radiator. In other words, the first antenna and the second antenna are co-aperture antennas. When the frequency band of the electromagnetic wave signal transmitted and received by the first antenna is fixed, compared with the situation where the first antenna can only utilize the first radiator and cannot utilize the second radiator when working, the length of the first radiator of the first antenna in the antenna assembly provided by the embodiment of the present application is shorter. In addition, when the frequency band of the electromagnetic wave signal transmitted and received by the second antenna is fixed, compared with the situation where the second antenna can only utilize the second radiator and cannot utilize the first radiator when working, the length of the second radiator of the second antenna in the antenna assembly provided by the embodiment of the present application is shorter. Thus, it can be seen that the lengths of the first radiator and the second radiator in the antenna assembly provided by the embodiment of the present application are both shorter, and the volume of the antenna assembly is smaller, occupying less space. When the antenna assembly is applied to an electronic device, it is convenient to arrange with other components in the electronic device.

[0009] Further, the second matching circuit includes a frequency selection and filtering sub-circuit. The frequency selection and filtering sub-circuit is a band-stop circuit for the third frequency band and a band-pass circuit for the second frequency band, so that adding the second signal source to the antenna assembly can not only enable the second antenna to support the third frequency band but also not affect the second frequency band where the first antenna originally works. The band-pass sub-circuit is a band-pass circuit for the third frequency band, that is, it presents a low impedance to the third frequency band and a high impedance to other frequency bands (the first frequency band and the second frequency band in this embodiment), thereby isolating other frequency bands. The antenna assembly provided by the embodiment of the present application has good communication performance. Therefore, the antenna assembly provided by the embodiment of the present application has good communication performance. Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 Schematic diagram of the antenna assembly provided by an embodiment of the present application;

[0012] Figure 2 ForFigure 1 Schematic diagram of the second matching circuit provided by one embodiment;

[0013] Figure 3 For Figure 2 Schematic diagram of the circuit structure of one embodiment of the frequency selection filtering sub - circuit shown in;

[0014] Figure 4 For Figure 1 Schematic diagram of the second matching circuit provided by another embodiment in;

[0015] Figure 5 For Figure 1 Schematic diagram of the second matching circuit provided by yet another embodiment in;

[0016] Figure 6 For Figure 5 Schematic diagram of the circuit structure of the band - pass sub - circuit provided by one embodiment in;

[0017] Figure 7 For Figure 5 Schematic diagram of the circuit structure of the band - stop sub - circuit provided by one embodiment in;

[0018] Figure 8 For Figure 1 Schematic diagram of the second matching circuit provided by yet another embodiment in;

[0019] Figure 9 For Figure 8 Schematic diagram of the tuning sub - circuit provided by one embodiment in;

[0020] Figure 10 For Figure 8 Schematic diagram of the tuning sub - circuit provided by yet another embodiment in;

[0021] Figure 11 Schematic diagram of the S - parameters of the first antenna and the second antenna when the switch in the antenna assembly is in the off state;

[0022] Figure 12 Schematic diagram of the S - parameters of the first antenna and the second antenna when the switch in the antenna assembly is in the on state;

[0023] Figure 13 Schematic diagram of the current distribution corresponding to the first resonance mode in the antenna assembly provided by one embodiment;

[0024] Figure 14 Schematic diagram of the current distribution corresponding to the second resonance mode in the antenna assembly provided by one embodiment;

[0025] Figure 15 Schematic diagram of the current distribution corresponding to the third resonance mode in the antenna assembly provided by one embodiment;

[0026] Figure 16 Schematic diagram of current distribution corresponding to the fourth resonance mode in the antenna assembly provided for one embodiment;

[0027] Figure 17 Schematic diagram of the antenna assembly provided for another embodiment of the present application;

[0028] Figure 18 Schematic diagram of the antenna assembly provided for yet another embodiment of the present application;

[0029] Figure 19 For Figure 17 Schematic diagram of current distribution of the fifth resonance mode corresponding to the antenna assembly shown in;

[0030] Figure 20 For Figure 18 Schematic diagram of current distribution of the fifth resonance mode corresponding to the antenna assembly shown in;

[0031] Figure 21 Schematic diagram of the antenna assembly provided for yet another embodiment of the present application;

[0032] Figure 22 Three-dimensional structure diagram of the electronic device provided for one embodiment of the present application;

[0033] Figure 23 For one embodiment provided Figure 22 Cross-sectional view of line I-I in;

[0034] Figure 24 Top view of the conductive housing in one embodiment of the present application;

[0035] Figure 25 Top view of the conductive housing in another embodiment of the present application;

[0036] Figure 26 Schematic diagram of the positions of the first radiator and the second radiator in the electronic device in one embodiment;

[0037] Figure 27 For Figure 1 Schematic diagram of the upper hemisphere efficiency of the antenna assembly shown in.

[0038] Main element numbers:

[0039] Electronic device 1, antenna assembly 10, first antenna 110, first radiator 111, first grounding end 1111, first free end 1112, first matching circuit M1, first signal source S1, third radiator 113, second antenna 120, second radiator 121, second grounding end 1211, second free end 1212, coupling end face 121a, second matching circuit M2, frequency selection and filtering sub-circuit 1221, first inductor L1, first capacitor C1, second capacitor C2, switch 1222, band-pass sub-circuit 1223, second capacitor C2, third inductor L3, second signal source S2, tuning sub-circuit 1224, first tuning unit m1, second tuning unit m2, third tuning unit m3, first sub-current I1, second sub-current I2, third sub-current I3, fourth sub-current I4, fifth sub-current I5, sixth sub-current I6, conductive housing 20, housing body 210, first conductive section 220, second conductive section 230, middle frame 30, screen 40, circuit board 50, battery cover 60, top 1a, bottom 1b, first side 11, second side 12, third side 13, fourth side 14. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] Referring to "embodiment" or "implementation manner" herein means that the specific features, structures, or characteristics described in connection with the embodiment or implementation manner may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0042] The present application provides an antenna assembly 10. The antenna assembly 10 can be applied to an electronic device 1 (see Figure 22 ), and the electronic device 1 includes but is not limited to devices with communication functions such as mobile phones, mobile internet devices (MIDs), e-books, portable play stations (Play Station Portables, PSPs), or personal digital assistants (Personal Digital Assistants, PDAs).

[0043] Please refer to Figure 1 ,Figure 1 Schematic diagram of an antenna assembly provided by an embodiment of the present application. The antenna assembly 10 includes a first antenna 110 and a second antenna 120. The first antenna 110 includes a first radiator 111, a first matching circuit M1, and a first signal source S1. The first radiator 111 has a first grounding end 1111 and a first free end 1112. The first grounding end 1111 is grounded, and the first signal source S1 is electrically connected to the first radiator 111 through the first matching circuit M1. The second antenna 120 includes a second radiator 121, a second matching circuit M2, and a second signal source S2. The second radiator 121 has a second grounding end 1211 and a second free end 1212. The second grounding end 1211 is grounded, the second free end 1212 is spaced apart from the first free end 1112 and forms a coupling gap 120a, the second radiator 121 is coupled to the first radiator 111 through the coupling gap 120a, and the second signal source S2 is electrically connected to the second matching circuit M2 to the second radiator 121. The first antenna 110 is used to support a first frequency band and a second frequency band, and the second antenna 120 is used to support a third frequency band.

[0044] In addition, it should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0045] The first radiator 111 is a flexible printed circuit (FPC) antenna radiator, or a laser direct structuring (LDS) antenna radiator, or a print direct structuring (PDS) antenna radiator, or a metal stub.

[0046] The first signal source S1 is used to generate a radio frequency signal. For the convenience of description, the radio frequency signal generated by the first signal source S1 is named the first radio frequency signal.

[0047] One end of the first matching circuit M1 is electrically connected to the first radiator 111, and the other end of the first matching circuit M1 is electrically connected to the first signal source S1, for loading the first radio frequency signal onto the first radiator 111. The first radiator 111 has a connection point, and for the convenience of description, the connection point of the first radiator 111 is named connection point A. One end of the first matching circuit M1 is electrically connected to the connection point A of the first radiator 111. The first matching circuit M1 is used to adjust the equivalent electrical length of the first antenna 110, so that the first antenna 110 supports the transceiver of electromagnetic wave signals in the first frequency band and the second frequency band.

[0048] The second radiator 121 is an FPC antenna radiator or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub. In one embodiment, the type of the first radiator 111 is the same as the type of the second radiator 121; in other embodiments, the type of the first radiator 111 may be different from the type of the second radiator 121, and the present application does not make any limitation thereto.

[0049] The second signal source S2 is used to generate a radio frequency signal, and for the convenience of description, the radio frequency signal generated by the second signal source S2 is named the second radio frequency signal.

[0050] One end of the second matching circuit M2 is electrically connected to the second radiator 121, and the other end of the second matching circuit M2 is electrically connected to the second signal source S2, for loading the second radio frequency signal onto the second radiator 121. The second radiator 121 has a connection point, and for the convenience of description, the connection point of the second radiator 121 is named connection point B. One end of the second matching circuit M2 is electrically connected to the connection point B of the second radiator 121. The second matching circuit M2 is used to adjust the equivalent electrical length of the second antenna 120, so that the second antenna 120 supports the transceiver of electromagnetic wave signals in the third frequency band. The specific structure of the second matching circuit M2 will be introduced in detail later.

[0051] The antenna assembly 10 provided by the embodiment of the present application has the second free end 1212 and the first free end 1112 arranged at an interval to form a coupling gap 120a, so that when the first antenna 110 works, it can not only utilize the first radiator 111, but also utilize the second radiator 121, enabling the first antenna 110 to support the first frequency band and the second frequency band. Therefore, the antenna assembly 10 has a better communication effect. Correspondingly, when the second antenna 120 works, it can not only utilize the second radiator 121, but also utilize the first radiator 111. In other words, the first antenna 110 and the second antenna 120 are co-aperture antennas. When the frequency band of the electromagnetic wave signal transmitted and received by the first antenna 110 is fixed, compared with the situation where the first antenna 110 can only utilize the first radiator 111 and cannot utilize the second radiator 121 when working, the length of the first radiator 111 of the first antenna 110 in the antenna assembly 10 provided by the embodiment of the present application is shorter. In addition, when the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 120 is fixed, compared with the situation where the second antenna 120 can only utilize the second radiator 121 and cannot utilize the first radiator 111 when working, the length of the second radiator 121 of the second antenna 120 in the antenna assembly 10 provided by the embodiment of the present application is shorter. Thus, it can be seen that the lengths of the first radiator 111 and the second radiator 121 in the antenna assembly 10 provided by the embodiment of the present application are both shorter, and the volume of the antenna assembly 10 is smaller, occupying less space. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to be arranged with other components in the electronic device 1.

[0052] In one embodiment, the size d of the coupling gap 120a between the first radiator 111 and the second radiator 121 is: 0.5 mm ≤ d ≤ 2.0 mm. The size of the coupling gap 120a refers to the size of the coupling gap 120a in the arrangement direction of the first radiator 111 and the second radiator 121. For details, please refer to Figure 1 , in Figure 1 the size d is shown. The gap size d between the first radiator 111 and the second radiator 121 is selected within the above range, so as to ensure a good coupling effect between the first radiator 111 and the second radiator 121. Further optionally, 0.5 mm ≤ d ≤ 1.5 mm, so that the coupling between the first radiator 111 and the second radiator 121 is higher and better. It can be understood that the coupling gap 120a between the first radiator 111 and the second radiator 121 may not take the above values, as long as the first radiator 111 and the second radiator 121 can be coupled through the coupling gap 120a.

[0053] In one embodiment, the first frequency band is the Middle High Band (MHB) frequency band, the second frequency band is the Ultra High Band (UHB) frequency band, and the third frequency band is the GPS-L5 frequency band.

[0054] In another embodiment, the first frequency band is the Lower Band (LB) frequency band, and the second frequency band is the MHB frequency band. In yet another embodiment, the first frequency band is the LB frequency band, and the second frequency band is the UHB frequency band.

[0055] The range of the LB frequency band is a frequency band below 1000 MHz. The range of the MHB frequency band is from 1000 MHz to 3000 MHz, and the range of the UHB frequency band is from 3000 MHz to 6000 MHz. It should be noted that GPS mentioned here represents positioning, including but not limited to Global Positioning System (GPS) positioning, Beidou positioning, GLONASS positioning, GALILEO positioning, etc. The resonant frequency point of the GPS-L5 frequency band is 1176 MHz.

[0056] Please refer to Figure 1 and Figure 2 , Figure 2 is Figure 1 a schematic diagram of the second matching circuit provided in one embodiment of. The second radiator 121 has a connection point B. The second matching circuit M2 includes a frequency selection and filtering sub-circuit 1221. One end of the frequency selection and filtering sub-circuit 1221 is electrically connected to the connection point B, and the other end is grounded. The frequency selection and filtering sub-circuit 1221 is a band-stop circuit for the third frequency band and a band-pass circuit for the second frequency band.

[0057] The first signal source S1 is loaded onto the first radiator 111 through the first matching circuit M1, so that the first antenna 110 supports the first frequency band and the second frequency band. When the antenna assembly 10 is loaded with the second signal source S2, not only should the second antenna 120 support the third frequency band, but also it should not affect at least one of the first frequency band and the second frequency band in which the first antenna 110 originally operates. Therefore, it is necessary to design the second matching circuit M2.

[0058] In the embodiments of the present application, the second matching circuit M2 includes a frequency selective filtering sub-circuit 1221. The frequency selective filtering sub-circuit 1221 is a band-stop circuit for the third frequency band and a band-pass circuit for the second frequency band. Thus, adding the second signal source S2 to the antenna assembly 10 can not only enable the second antenna 120 to support the third frequency band, but also not affect the second frequency band in which the first antenna 110 originally operates. Therefore, the antenna assembly 10 provided by the embodiments of the present application has good communication performance. When the first frequency band is the Middle High Band (MHB) frequency band, the second frequency band is the Ultra High Band (UHB) frequency band, and the third frequency band is the GPS-L5 frequency band, the antenna assembly 10 has good performance in the MHB+UHB frequency band and good performance in the GPS-L5 frequency band.

[0059] Please refer to Figure 3 , Figure 3 for Figure 2 a schematic circuit structure diagram of an embodiment of the frequency selective filtering sub-circuit shown in. In one embodiment, the frequency selective filtering sub-circuit 1221 includes a first inductor L1, a first capacitor C1, and a second inductor L2. One end of the first inductor L1 is electrically connected to the connection point. The first capacitor C1 is connected in parallel with the first inductor L1. One end of the second inductor L2 is electrically connected to the node where the first capacitor C1 is connected in parallel with the first inductor L1, and the other end is grounded.

[0060] The frequency selective filtering sub-circuit 1221 exhibits different impedance characteristics for different frequency bands. The parallel circuit of the first capacitor C1 and the first inductor L1 forms a band-stop for the third frequency band, that is, it presents a high impedance to the third frequency band. The first inductor L1, the first capacitor C1, and the second inductor L2 form a band-pass for the second frequency band, that is, they present a low impedance to the electromagnetic wave signal of the second frequency band. The frequency selective filtering sub-circuit 1221 (in this embodiment, the first inductor L1, the first capacitor C1, and the second inductor L2) presents a capacitance to the first frequency band.

[0061] Please refer to Figure 1 and Figure 4 , Figure 4 for Figure 1Schematic diagram of the second matching circuit provided by another embodiment. The second matching circuit M2 further includes a switch 1222. The other end of the frequency selection and filtering sub-circuit 1221 is grounded through the switch 1222. In the schematic diagram of this embodiment, taking the second matching circuit M2 further including the switch 1222 being combined with the frequency selection and filtering sub-circuit 1221 including a first inductor L1, a first capacitor C1, and a second inductor L2 as an example for illustration, it can be understood that it should not be construed as a limitation to the second matching circuit M2 in the antenna assembly 10 provided by the present application.

[0062] As can be known from the previous introduction, the frequency selection and filtering sub-circuit 1221 (in this embodiment, the first inductor L1, the first capacitor C1, and the second inductor L2) presents a capacitance to the first frequency band. Compared with the case where the frequency selection and filtering sub-circuit 1221 is not provided in the second matching circuit M2, setting the frequency selection and filtering sub-circuit 1221 in the second matching circuit M2, and the frequency selection and filtering sub-circuit 1221 presenting a capacitance to the first frequency band will cause a decrease in the performance of the first frequency band. In order to maintain the performance of the first frequency band, a switch 1222 is provided in the second matching circuit M2, and the other end of the frequency selection and filtering sub-circuit 1221 is grounded through the switch 1222, so as to maintain a small decrease or even no decrease in the performance of the first frequency band.

[0063] When the switch 1222 is in the open state, the first antenna 110 supports a first sub-band and a second sub-band in the first frequency band, where the frequency of the first sub-band is less than the frequency of the second sub-band. In other words, when the first signal source S1 operates in the first frequency band, the switch 1222 is in the open state.

[0064] When the switch 1222 is in the closed state, the first antenna 110 supports at least the first sub-band in the first frequency band.

[0065] When the switch 1222 is in the closed state, the first antenna 110 supports at least the first sub-band in the first frequency band, including: the first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band; or, the first antenna 110 supports the first sub-band in the first frequency band, and the first antenna 110 supports the second sub-band in the first frequency band.

[0066] The first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band. In other words, when the first signal source S1 operates in the first sub-band, the switch 1222 is in the closed state.

[0067] It should be noted that in another embodiment, when the switch 1222 is in the closed state, the second radiator 121 enables the first antenna 110 to support the first sub-band in the first frequency band and whether to support the second sub-band in the first frequency band according to preset size parameters. For example, when the equivalent electrical length of the second radiator 121 is L1, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band. When the equivalent electrical length of the second radiator 121 is L2, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and supports the second sub-band in the first frequency band, where L2 < L1.

[0068] In this embodiment, the first sub-band is the Middle Band (MB) frequency band, and the second frequency band is the High Band (HB) frequency band. The MB is 1000 - 2200 MHz, such as the B3 frequency band or the B1 frequency band. The range of the HB frequency band is 2200 - 3000 MHz, such as the B40 frequency band, or the B41 frequency band.

[0069] It should be noted that regardless of whether the switch 1222 is in the closed state or the open state, the third frequency band exists, and the resonant frequency point of the third frequency band remains unchanged or changes slightly. Therefore, when the frequency selection and filtering sub-circuit 1221 includes the first inductor L1, the first capacitor C1, and the second inductor L2, the band-stop circuit of the first capacitor C1 and the first inductor L1 isolates the third frequency band.

[0070] Please refer to Figure 5 , Figure 5 for Figure 1 a schematic diagram of the second matching circuit provided in yet another embodiment. The second matching circuit M2 further includes a band-pass sub-circuit 1223. The second matching circuit M2 further including a band-pass sub-circuit 1233 can be combined with any of the embodiments of the second matching circuit M2 described above. In the schematic diagram of this embodiment, the structure of the second matching circuit M2 should not be construed as a limitation on the second matching circuit M2 provided by the embodiments of the present application. One end of the band-pass sub-circuit 1223 is electrically connected to the connection point B, and the other end is electrically connected to the second signal source S2. The band-pass sub-circuit 1223 is a band-pass circuit for the third frequency band.

[0071] The band-pass sub-circuit 1223 is a band-pass circuit for the third frequency band, that is, it presents a low impedance to the third frequency band and a high impedance to other frequency bands (the first frequency band and the second frequency band in this embodiment), thereby isolating the other frequency bands. The antenna assembly 10 provided by the embodiment of the present application has good communication performance.

[0072] Please refer to Figure 5 and Figure 6 , Figure 6 is Figure 5 a schematic circuit diagram of a band-pass sub-circuit provided by an embodiment in

[0073] Please refer to Figure 5 and Figure 7 , Figure 7 is Figure 5 a schematic circuit diagram of a band-stop sub-circuit provided by an embodiment in

[0074] Please refer to Figure 1 and Figure 8 , Figure 8 is Figure 1 a schematic diagram of a second matching circuit provided by another embodiment in

[0075] The second matching circuit M2 further includes a tuning sub-circuit 1224. The tuning sub-circuit 1224 is used to tune the resonance point of the third frequency band.

[0076] The so-called resonance point is also called the resonance frequency point. The tuning sub-circuit 1224 is used to tune the resonance point of the third frequency band, so that the antenna assembly 10 has good communication quality in the third frequency band.

[0077] Please refer to Figure 8 and Figure 9 , Figure 9 is Figure 8Schematic diagram of a tuning sub - circuit provided by an embodiment. The tuning sub - circuit 1224 includes a first tuning unit m1. One end of the first tuning unit m1 is electrically connected to the second signal source S2, and the other end is electrically connected to the connection point B. It should be noted that in this embodiment, the other end of the first tuning unit m1 is indirectly electrically connected to the connection point B.

[0078] Please refer to Figure 8 and Figure 10 , Figure 10 is Figure 8 Schematic diagram of a tuning sub - circuit provided by another embodiment. The tuning sub - circuit 1224 further includes at least one of a second tuning unit m2 and a third tuning unit m3. When the tuning sub - circuit 1224 includes the second tuning unit m2, one end of the second tuning unit m2 is grounded, and the other end is electrically connected to the other end of the first tuning unit m1. When the tuning sub - circuit 1224 includes the third tuning unit m3, one end of the third tuning unit m3 is grounded, and the other end of the third tuning unit m3 is electrically connected to the second signal source S2.

[0079] That is to say, the tuning sub - circuit 1224 includes at least one of the second tuning unit m2 and the third tuning unit m3, including: the tuning sub - circuit 1224 includes the second tuning unit m2 and does not include the third tuning unit m3; or, the tuning sub - circuit 1224 includes the third tuning unit m3 and does not include the second tuning unit m2; or, the tuning sub - circuit 1224 includes the second tuning unit m2 and includes the third tuning unit m3. In the schematic diagram of this embodiment, the case where the tuning sub - circuit 1224 further includes the second tuning unit m2 and the third tuning unit m3 is used as an example for illustration, and it should not be construed as a limitation on the tuning sub - circuit 1224 provided by the embodiments of the present application.

[0080] Specifically, the first tuning unit m1 includes a capacitor; when the tuning sub - circuit 1224 includes the second tuning unit m2, the second tuning unit m2 includes a capacitor or an inductor; when the tuning sub - circuit 1224 includes the third tuning unit m3, the third tuning unit m3 includes a capacitor or an inductor.

[0081] Please continue to refer to Figure 10, in the present embodiment, the second matching circuit M2 includes a frequency selection and filtering sub-circuit 1221, a switch 1222, a band-pass sub-circuit 1223, and a tuning sub-circuit 1224 as an example for illustration. In addition, the frequency selection sub-circuit includes a first inductor L1, a first capacitor C1, and a second inductor L2; the band-pass sub-circuit 1223 includes a series-connected second capacitor C2 and a third inductor L3; and the tuning sub-circuit 1224 includes a first tuning unit m1, a second tuning unit m2, and a third tuning unit m3 as an example for illustration.

[0082] In the present embodiment, the inductance value of the first inductor L1 is equal to 30 nH, the capacitance value of the first capacitor C1 is equal to 0.8 pF, the inductance value of the second inductor L2 is equal to 1.8 nH, the inductance value of the third inductor L3 is equal to 12 nH, the capacitance value of the second capacitor C2 is equal to 1.5 pF, the first tuning unit m1 is a capacitor, and the capacitance value is equal to 1.2 pF; the second tuning unit m2 is a capacitor, and the capacitance value is equal to 1.5 pF; the third tuning unit m3 is a capacitor, and the capacitance value of the third tuning unit m3 is 1.5 pF.

[0083] Next, each resonance mode of the first antenna 110 will be introduced. Please refer to Figure 11 , Figure 11 is a schematic diagram of the S-parameters of the first antenna and the second antenna when the switch in the antenna assembly is in the off state. In this schematic diagram, the abscissa is frequency, with the unit of GHz; the ordinate is the S-parameter, with the unit of dB. Curve ① is the S11 curve of the first antenna 110; curve ② is the S11 curve of the second antenna 120; curve ③ is the S21 isolation curve of the first antenna 110 and the second antenna 120. When the switch 1222 is in the off state, the first antenna 110 has a first resonance mode, a second resonance mode, and a third resonance mode. Among them, the first resonance mode is used to support the first sub-band of the first frequency band, the second resonance mode is used to support the second sub-band of the first frequency band, and the third resonance mode is used to support the second frequency band.

[0084] The so-called resonance mode is also called resonance mode. As can be seen from curve ①, the first antenna 110 has a first resonance mode, a second resonance mode, and a third resonance mode. For the convenience of illustration in the figure, the first resonance mode is abbreviated as mode 1, the second resonance mode is abbreviated as mode 2, and the third resonance mode is abbreviated as mode 3. As can be seen from curve ①, the first resonance mode is used to support the first sub-band of the first frequency band (MB in this embodiment, such as the B3 frequency band), the second resonance mode is used to support the second sub-band of the first frequency band (HB in this embodiment, such as the B41 frequency band), and the third resonance mode is used to support the second frequency band (UHB in this embodiment, such as N78).

[0085] As can be seen from curve ②, the second antenna 120 operates in the third frequency band, which is the GPS-L5 frequency band in this embodiment.

[0086] As can be seen from curve ③, the first antenna 110 and the second antenna 120 have good isolation.

[0087] The length from the first grounding end 1111 to the coupling slot 120a is 1 / 4 wavelength of the resonant frequency point corresponding to the first resonant mode; or, the length from the first grounding end 1111 to the coupling slot 120a is approximately 1 / 4 wavelength of the resonant frequency point corresponding to the first resonant mode.

[0088] In other words, the first resonant mode corresponding to the first sub-band is the 1 / 4 wavelength mode from the first grounding end 1111 to the coupling slot 120a; or, the first resonant mode corresponding to the first sub-band is approximately the 1 / 4 wavelength mode from the first grounding end 1111 to the coupling slot 120a.

[0089] The length from the second grounding end 1211 to the coupling slot 120a is 1 / 4 wavelength of the resonant frequency point corresponding to the second resonant mode; or, the length from the second grounding end 1211 to the coupling slot 120a is approximately 1 / 4 wavelength of the resonant frequency point corresponding to the second resonant mode.

[0090] In other words, the second resonant mode corresponding to the second sub-band is the 1 / 4 wavelength mode from the second grounding end 1211 to the coupling slot 120a; or, the second resonant mode corresponding to the second sub-band is approximately the 1 / 4 wavelength mode from the second grounding end 1211 to the coupling slot 120a.

[0091] The second antenna 120 operates in the third frequency band, which is the GPS-L5 frequency band in this embodiment. The resonant mode corresponding to the third frequency band is the 1 / 8 - 1 / 4 wavelength mode from the second grounding end 1211 to the coupling slot 120a.

[0092] Please refer to Figure 12 , Figure 12 which is the schematic diagram of the S parameters of the first antenna and the second antenna when the switch in the antenna assembly is in the closed state. In this schematic diagram, the abscissa is frequency, with the unit of GHz; the ordinate is the S parameter, with the unit of dB. Curve ① is the S11 curve of the first antenna 110; curve ② is the S11 curve of the second antenna 120; curve ③ is the S21 isolation curve of the first antenna 110 and the second antenna 120.

[0093] When the switch 1222 is in the closed state, the first antenna 110 has a first resonance mode, a second resonance mode, a fourth resonance mode, and a fifth resonance mode. Among them, both the first resonance mode and the second resonance mode support at least the first sub-band in the first frequency band (MB in this embodiment), and both the fourth resonance mode and the fifth resonance mode are used to support the second frequency band (UHB in this embodiment).

[0094] As can be seen from curve ①, the first antenna 110 has a first resonance mode, a second resonance mode, a fourth resonance mode, and a fifth resonance mode. For the convenience of illustration in the figure, the first resonance mode is abbreviated as mode 1, the second resonance mode is abbreviated as mode 2, the fourth resonance mode is abbreviated as mode 4, and the fifth resonance mode is abbreviated as mode 5. As can be seen from curve ①, both the first resonance mode and the second resonance mode support the first sub-band in the first frequency band, and both the fourth resonance mode and the fifth resonance mode are used to support the second frequency band (UHB in this embodiment). The frequency bands supported by the fourth resonance mode and the fifth resonance mode are 3.3 GHz - 4.2 GHz, that is, N77 and N78 in UHB.

[0095] The length from the first signal source S1 to the coupling slot 120a is 1 / 4 wavelength of the resonance frequency point corresponding to the fourth resonance mode; or, the length from the first signal source S1 to the coupling slot 120a is approximately 1 / 4 wavelength of the resonance frequency band corresponding to the fourth resonance mode.

[0096] In other words, the fourth resonance mode is the 1 / 4 wavelength mode from the first signal source S1 to the coupling slot 120a; or, the fourth resonance mode is the 1 / 4 wavelength mode from the first signal source S1 to the coupling slot 120a.

[0097] The length from the second signal source S2 to the coupling slot 120a is 1 / 4 wavelength of the resonance frequency point corresponding to the fifth resonance mode; or, the length from the second signal source S2 to the coupling slot 120a is approximately 1 / 4 wavelength of the resonance frequency point corresponding to the fifth resonance mode.

[0098] In other words, the fifth resonance mode is the 1 / 4 wavelength mode from the second signal source S2 to the coupling slot 120a; or, the fifth resonance mode is approximately the 1 / 4 wavelength mode from the second signal source S2 to the coupling slot 120a.

[0099] From Figure 11 it can be seen that when the switch 1222 is in the open state, the resonance frequency point of the second resonance mode is 2.6 GHz; from Figure 12It can be seen that when the switch 1222 is in the closed state, the resonant frequency point of the second resonance mode is 2.3 GHz. Therefore, compared with the second resonance mode in Figure 11 , the resonant frequency point of the resonance mode in Figure 12 shifts downward, improving the performance of the first sub-band (MB band in this embodiment). Specifically, as can be seen from Figure 11 , when the switch 1222 is in the open state, the first resonance mode covers the first sub-band (MB band in this embodiment) in the first frequency band, and the second resonance mode covers the second sub-band (HB band in this embodiment) in the first frequency band. As can be seen from Figure 12 , when the switch 1222 is in the closed state, both the first resonance mode and the second resonance mode cover the first sub-band (MB band in this embodiment) in the first frequency band.

[0100] It should be noted that in another embodiment, when the switch 1222 is in the closed state, the second radiator 121, according to the preset size parameters, enables the first antenna 110 to support the first sub-band in the first frequency band and whether to support the second sub-band in the first frequency band. For example, when the equivalent electrical length of the second radiator 121 is L01, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band. When the equivalent electrical length of the second radiator 121 is L02, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and supports the second sub-band in the first frequency band, where L02 < L01.

[0101] The main current distributions in each resonance mode will be described below. It should be noted that the main current distributions in the following resonance modes do not represent all the current distributions in each resonance mode. The current at the main current distribution in each resonance mode is relatively large, while in other parts, it does not mean that there is no current distribution, but the current distribution is relatively small. In addition, it should be noted that since the current distributions of the first antenna 110 in the first resonance mode, the second resonance mode, the third resonance mode, the fourth resonance mode, and the fifth resonance mode are being examined, the second radiator 121 being electrically connected to the second signal source S2 through the second matching circuit M2 can be equivalently considered as the second radiator 121 being electrically connected to the ground electrode through the second matching circuit M2.

[0102] Please refer to Figure 13 , Figure 13Schematic diagram of the current distribution corresponding to the first resonance mode in the antenna assembly provided for an embodiment. The first resonance mode in this embodiment corresponds to the case where the switch 1222 in the second matching circuit M2 is turned on or off, or the second matching circuit M2 does not include the switch 1222. When the first antenna 110 resonates in the first resonance mode, the current corresponding to the first resonance mode: from the second grounding end 1211 to the second free end 1212, from the second free end 1212 through the coupling gap 120a to the first free end 1112, and from the first free end 1112 to the first grounding end 1111.

[0103] Please refer to Figure 14 , Figure 14 Schematic diagram of the current distribution corresponding to the second resonance mode in the antenna assembly provided for an embodiment. The first resonance mode in this embodiment corresponds to the case where the switch 1222 in the second matching circuit M2 is turned on or off, or the second matching circuit M2 does not include the switch 1222. The current corresponding to the second resonance mode: from the first signal source S1 to the connection point of the first radiator 111 and the first matching circuit M1, and flows to the first free end 1112, from the first free end 1112 through the coupling gap 120a to the second free end 1212, and from the second free end 1212 to the second grounding end 1211.

[0104] Please refer to Figure 15 , Figure 15 Schematic diagram of the current distribution corresponding to the third resonance mode in the antenna assembly provided for an embodiment. The current corresponding to the third resonance mode includes a first sub-current I1 and a second sub-current I2. The first sub-current I1 flows from the first grounding end 1111 to the first free end 1112. The second sub-current I2 flows from the second grounding end 1211 to the second free end 1212.

[0105] Please refer to Figure 16 , Figure 16 Schematic diagram of the current distribution corresponding to the fourth resonance mode in the antenna assembly provided for an embodiment. The direction of the current corresponding to the fourth resonance mode is: from the first signal source S1 through the first matching circuit M1, the connection point of the first matching circuit M1 and the first radiator 111 to the first free end 1112, through the first free end 1112 through the coupling gap 120a to the second free end 1212, and from the second free end 1212 to the connection point of the second radiator 121, the second matching circuit M2 to the ground electrode.

[0106] Please combine Figure 1 , and also refer toFigure 17 and Figure 18 , Figure 17 is a schematic diagram of an antenna assembly provided for another embodiment of the present application; Figure 18 is a schematic diagram of an antenna assembly provided for yet another embodiment of the present application. The distance d1 between the connection point B of the second radiator 121 and the second free end 1212 satisfies: 0≤d1≤L / 2. In other words, the second radiator 121 has a coupling end face 121a facing the first free end 1112, and the distance d1 between the connection point B of the second radiator 121 and the coupling end face 121a satisfies: 0≤d1≤L / 2, where L is the length of the second radiator 121.

[0107] In Figure 1 , the distance d1 between the connection point B of the second radiator 121 and the coupling end face 121a satisfies: 0<d1<L / 2. For example, d1 = L / 3. In Figure 17 , d1 = L / 2. In Figure 18 , d1 = 0.

[0108] Please refer to Figure 17 and Figure 19 , Figure 19 is Figure 17 a schematic diagram of the current distribution of the fifth resonance mode corresponding to the antenna assembly shown in. When the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is L / 2, the current corresponding to the fifth resonance mode includes a third sub-current I3 and a fourth sub-current I4. The third sub-current I3 flows from the first signal source S1 through the first matching circuit M1, the connection current of the first matching circuit M1 and the first radiator 111 to the first free end 1112. The fourth sub-current I4 flows from the second matching circuit M2, the connection point of the second matching circuit M2 and the second radiator 121 to the second free end 1212.

[0109] When the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is L / 3, the current corresponding to the fifth resonance mode includes the third sub-current I3 and the fourth sub-current I4. For the description of the third sub-current I3 and the fourth sub-current I4, please refer to the previous description and will not be repeated here. In other words, when the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is L / 3, the current distribution corresponding to the fifth resonance mode is the same as the current distribution corresponding to the fifth resonance mode when the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is L / 2.

[0110] Please refer to Figure 18 andFigure 20 , Figure 20 is Figure 18 a schematic diagram of the current distribution of the fifth resonance mode corresponding to the antenna assembly shown in. When the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is 0, the current corresponding to the fifth resonance mode includes a fifth sub-current I5 and a sixth sub-current I6. The fifth sub-current I5 flows from the second matching circuit M2 to the connection point B of the second radiator 121 and flows in the direction from the connection point B towards the second grounding end 1211. The sixth sub-current I6 flows in the direction from the second grounding end 1211 towards the first free end 1112.

[0111] For convenience of description, the current corresponding to the fifth resonance mode is named the first distribution mode by the current distribution mode including the third sub-current I3 and the fourth sub-current I4; the current corresponding to the fifth resonance mode is named the second distribution mode by the current distribution mode including the fifth sub-current I5 and the sixth sub-current I6.

[0112] It can be understood that when the distance d1 between the connection point of the second radiator 121 and the coupling end face 121a is D, it is the switching point between the first distribution mode and the second distribution mode, where 0 < d1 < L / 3. When 0 ≤ d1 < D, the current distribution of the fifth resonance mode is the second distribution mode; when D ≤ d1 ≤ L / 2, the current distribution of the fifth resonance mode is the first distribution mode.

[0113] The second radiator 121 has a coupling end face 121a facing the first free end 1112, and the distance d1 between the connection point B of the second radiator 121 and the coupling end face 121a satisfies: 0 ≤ d1 ≤ L / 2, so that the position layout of connecting the second signal source S2 and the second matching circuit M2 to the connection point B on the second radiator 121 is more flexible. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to be combined and laid out with other components in the electronic device 1.

[0114] In this embodiment, by setting the position of connection point B on the second radiator 121, a wide frequency band of the third sub-band (N77 band in this embodiment) and the fourth sub-band (N78 band in this embodiment) in the second frequency band (UHB band in this embodiment) is achieved. In this embodiment, the frequency band ranges of the N77 band and the N78 band are: 3.3 GHz - 4.2 GHz. In other words, the antenna assembly 10 provided by the embodiment of the present application can support the N77 band and the N78 band simultaneously at the same time. In the related art, the active switch 1222 in the antenna assembly 10 is used to switch between the N77 band and the N78 band, but it cannot support the N77 band and the N78 band at the same time. In addition, in the related art, the full frequency band of N77 cannot be achieved, a part of the N77 band is achieved in one time period, and another part of the N77 band is achieved in another time period. It can be seen that the antenna assembly 10 in the related art cannot support the N77 band and the N78 band at the same time, while the antenna assembly 10 provided by the embodiment of the present application can achieve the N77 band and the N78 band simultaneously through the position setting of connection point B. Therefore, it has a better communication effect. In addition, the antenna assembly 10 provided by the embodiment of the present application does not need to be provided with an active switch 1222. The antenna assembly 10 has a smaller volume and occupies less space. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to be combined and arranged with other components in the electronic device 1. In addition, the antenna assembly 10 provided by the embodiment of the present application can achieve the full frequency bands of the N77 band and the N78 band. Therefore, the antenna assembly 10 provided by the embodiment of the present application has a better communication effect in the N77 band and the N78 band.

[0115] Please refer to Figure 21 , Figure 21 which is a schematic diagram of an antenna assembly provided by another embodiment of the present application. In this embodiment, the first antenna 110 further includes a third radiator 113. The third radiator 113 is electrically connected to the first matching circuit M1. The third radiator 113 is used to support the second frequency band or the fourth frequency band, where the fourth frequency band is different from any one of the first frequency band, the second frequency band, and the third frequency band.

[0116] The first antenna 110 further including the third radiator 113 can be combined into the antenna assembly 10 provided by any of the previous embodiments. In the schematic diagram of this embodiment, the first antenna 110 further including the third radiator 113 is schematically shown in the schematic diagram of the antenna assembly 10 provided by one of the previous embodiments. It can be understood that it should not be construed as a limitation to the antenna assembly 10 provided by the present application.

[0117] The third radiator 113 is a Flexible Printed Circuit (FPC) antenna radiator, or a Laser Direct Structuring (LDS) antenna radiator, or a Print Direct Structuring (PDS) antenna radiator, or a metal stub.

[0118] In this embodiment, taking the third radiator 113 for supporting the second frequency band as an example for illustration. For example, the third radiator 113 is used to support the N79 frequency band in the second frequency band (the UHB frequency band in this embodiment).

[0119] It can be understood that in other embodiments, the third radiator 113 is used to support the fourth frequency band, where the fourth frequency band is different from any of the first frequency band, the second frequency band, and the third frequency band.

[0120] In this embodiment, by setting the third radiator 113, the antenna assembly 10 can support more frequency bands, so that the antenna assembly 10 has better communication performance.

[0121] This application also provides an electronic device 1, which includes but is not limited to devices with communication functions such as mobile phones, mobile internet devices (MIDs), e-books, Play Station Portables (PSPs), or Personal Digital Assistants (PDAs). Please refer to Figure 22 and Figure 23 , Figure 22 is a three-dimensional structure diagram of the electronic device provided by an embodiment of this application; Figure 23 is a cross-sectional view taken along line I-I in Figure 22 for an embodiment. The electronic device 1 includes the antenna assembly 10 described in any of the previous embodiments.

[0122] Please refer to Figure 22 , Figure 23 , Figure 24 and Figure 25 , Figure 24 is a top view of the conductive housing in an embodiment of this application; Figure 25This is a top view of the conductive housing in another embodiment of the present application. The electronic device 1 further includes a conductive housing 20. The conductive housing 20 includes a housing body 210, a first conductive section 220, and a second conductive section 230. The first conductive section 220 and the second conductive section 230 are spaced apart, and there are gaps between the first conductive section 220 and the second conductive section 230 and the housing body 210 respectively. One end of the first conductive section 220 facing away from the second conductive section 230 is connected to the housing body 210, and one end of the second conductive section 230 facing away from the first conductive section 220 is connected to the housing body 210. Among them, the first radiator 111 includes the first conductive section 220, and the second radiator 121 includes the second conductive section 230. In Figure 24 , taking the sides of the housing body 210 corresponding to the first conductive section 220 and the second conductive section 230 as an example for illustration; in Figure 25 taking the corners of the housing body 210 corresponding to the first conductive section 220 and the second conductive section 230 as an example for illustration.

[0123] In this embodiment, the conductive housing 20 is a metal housing. For example, the material of the conductive housing 20 may include aluminum-magnesium alloy, or aluminum, or copper, etc. Since a relatively large piece of metal can form a ground electrode, the housing body 210 can form the ground electrode. One end of the first conductive section 220 facing away from the second conductive section 230 is connected to the housing body 210 so that the first conductive section 220 is grounded; one end of the second conductive section 230 facing away from the second conductive section 230 is connected to the housing body 210 so that the second conductive section 230 is grounded.

[0124] Please refer to Figure 23 again. The conductive housing 20 includes a frame 240. The frame 240 is bent and connected to the periphery of the housing body 210. The first conductive section 220 and the second conductive section 230 are formed on the frame 240.

[0125] In this embodiment, the conductive housing 20 is the middle frame 30 of the electronic device 1.

[0126] The material of the middle frame 30 is metal, such as aluminum-magnesium alloy. The middle frame 30 generally forms the ground of the electronic device 1. When the electronic components in the electronic device 1 need to be grounded, they can be connected to the middle frame 30 to be grounded. In addition, the ground system in the electronic device 1 includes not only the middle frame 30 but also the ground in the circuit board 50 and the ground in the screen 40.

[0127] In this embodiment, the electronic device 1 further includes a screen 40, a circuit board 50, and a battery cover 60. The screen 40 may be a display screen with a display function or a screen integrated with display and touch functions. The screen 40 is used to display information such as text, images, and videos. The screen 40 is carried on the middle frame 30 and is located on one side of the middle frame 30. The circuit board 50 is usually also carried on the middle frame 30, and the circuit board 50 and the screen 40 are carried on opposite sides of the middle frame 30. At least one or more of the first signal source S1, the second signal source S2, the first matching circuit M1, and the second matching circuit M2 in the antenna assembly 10 introduced above may be provided on the circuit board 50. The battery cover 60 is provided on the side of the circuit board 50 facing away from the middle frame 30. The battery cover 60, the middle frame 30, the circuit board 50, and the screen 40 cooperate with each other to assemble into a complete electronic device 1. It can be understood that the description of the structure of the electronic device 1 is only a description of one form of the structure of the electronic device 1, and should not be construed as a limitation on the electronic device 1, nor should it be construed as a limitation on the antenna assembly 10.

[0128] In other embodiments, the conductive frame 20 may not be the middle frame 30, but a conductive frame 20 provided inside the electronic device 1.

[0129] In other embodiments, the first radiator 111 is an FPC antenna radiator or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub; the second radiator 121 is an FPC antenna radiator or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub. The first radiator 111 may be provided at the edge of the middle frame 30 and is electrically connected to the middle frame 30. It can be understood that in other embodiments, the first radiator 111 and the second radiator 121 may also be provided at other positions and are electrically connected to the ground system in the electronic device 1 to be grounded. The ground system in the electronic device 1 includes the middle frame 30, the screen 40, and the circuit board 50. The first radiator 111 and the second radiator 121 are electrically connected to the ground system of the electronic device 1, including the first radiator 111 and the second radiator 121 being electrically connected to any one or more of the ground of the middle frame 30, the ground of the screen 40, and the ground of the circuit board 50.

[0130] In one embodiment, the first radiator 111 and the second radiator 121 are antenna radiators of the same type and are disposed on the same substrate. The first radiator 111 and the second radiator 121 are of the same type and are disposed on the same substrate, facilitating the preparation of the first radiator 111 and the second radiator 121 and the assembly of the first radiator 111 and the second radiator 121 with other components in the electronic device 1. In this embodiment, the electronic device 1 further includes a ground system, which includes one or more of the ground of the middle frame 30, the ground of the circuit board 50, and the ground of the display screen. The first grounding end 1111 of the first radiator 111 is electrically connected to the ground system for grounding, and the second grounding end 1211 of the second radiator 121 is electrically connected to the ground system for grounding. In this embodiment, the first radiator 111 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub; the second radiator 121 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub. When the first radiator 111 and the second radiator 121 are not directly formed on the middle frame 30, they need to be electrically connected to the ground system in the electronic device 1.

[0131] When the first radiator 111 is electrically connected to the ground of the middle frame 30, the first radiator 111 can be connected to the ground of the middle frame 30 through a connecting rib, or the first radiator 111 is electrically connected to the ground of the middle frame 30 through a conductive elastic sheet. Similarly, when the second radiator 121 is electrically connected to the ground of the middle frame 30, the second radiator 121 can be connected to the ground of the middle frame 30 through a connecting rib, or the second radiator 121 is electrically connected to the ground of the middle frame 30 through a conductive elastic sheet.

[0132] Please refer to Figure 26 , Figure 26 FIG. is a schematic diagram of the positions of the first radiator and the second radiator in an electronic device in one embodiment. In this embodiment, the electronic device 1 includes a top 1a and a bottom 1b, and both the first radiator 111 and the second radiator 121 are disposed on the top 1a.

[0133] The so-called top 1a refers to the part located above when the electronic device 1 is in use (for example, when the electronic device 1 is in a vertical screen state), and the bottom 1b is the part located below the electronic device 1 opposite to the top 1a.

[0134] There are three cases where the first radiator 111 and the second radiator 121 are disposed on the top 1a: the first radiator 111 and the second radiator 121 are disposed at the upper left corner of the electronic device 1; or, the first radiator 111 and the second radiator 121 are disposed on the top edge of the electronic device 1; or the first radiator 111 and the second radiator 121 are disposed at the upper right corner of the electronic device 1.

[0135] When the first radiator 111 and the second radiator 121 are disposed at the upper left corner of the electronic device 1, there are the following cases: a part of the first radiator 111 is located on the left side, another part of the first radiator 111 is located on the top edge, and the second radiator 121 is located on the top edge; or, a part of the second radiator 121 is located on the top edge, another part of the second radiator 121 is located on the left side, and the first radiator 111 is located on the left side; or, the first radiator 111 is located on the left side and the second radiator 121 is located on the top edge.

[0136] When the first radiator 111 and the second radiator 121 are disposed at the upper right corner of the electronic device 1, there are the following cases: a part of the first radiator 111 is located on the top edge, another part of the first radiator 111 is located on the right side, and the second radiator 121 is located on the right side; or, a part of the second radiator 121 is located on the right side, a part of the second radiator 121 is located on the top edge, and a part of the first radiator 111 is located on the top edge; or, the first radiator 111 is located on the top edge and the second radiator 121 is located on the right side.

[0137] When the electronic device 1 is placed vertically, the top 1a of the electronic device 1 usually faces away from the ground, while the bottom 1b of the electronic device 1 usually approaches the ground. When the first radiator 111 and the second radiator 121 are disposed on the top 1a, the radiation efficiency of the upper hemisphere of the first antenna 110 and the second antenna 120 is better, so that the first antenna 110 and the second antenna 120 have better communication efficiency. Of course, in other embodiments, the first radiator 111 and the second radiator 121 may also be disposed corresponding to the bottom 1b of the electronic device 1. Although the radiation efficiency of the upper hemisphere of the first antenna 110 and the second antenna 120 is not so good when the first radiator 111 and the second radiator 121 are disposed corresponding to the bottom 1b of the electronic device 1, as long as the radiation efficiency of the upper hemisphere is greater than or equal to the preset efficiency, a relatively good communication effect can also be achieved.

[0138] Please continue to refer to Figure 26, the electronic device 1 in this embodiment includes a first side 11, a second side 12, a third side 13, and a fourth side 14 that are connected end to end in sequence. The first side 11 and the third side 13 are the short sides of the electronic device 1, and the second side 12 and the fourth side 14 are the long sides of the electronic device 1. The first side 11 and the third side 13 face away from each other and are spaced apart, the second side 12 and the fourth side 14 face away from each other and are spaced apart, the second side 12 is bent and connected to the first side 11 and the third side 13 respectively, and the fourth side 14 is bent and connected to the first side 11 and the third side 13 respectively. Junctions of the first side 11 and the second side 12, the second side 12 and the third side 13, the third side 13 and the fourth side 14, and the fourth side 14 and the first side 11 all form corners of the electronic device 1. In this embodiment, the first side 11 is the top side of the electronic device 1, the second side is the right side of the electronic device 1, the third side is the bottom side of the electronic device 1, and the fourth side is the left side of the electronic device 1. It can be understood that in this embodiment, taking the first side 11 and the third side 13 as the short sides of the electronic device 1 and the second side 12 and the fourth side 14 as the long sides of the electronic device 1 as an example for illustration, in other embodiments, the lengths of the first side 11, the second side 12, the third side 13, and the fourth side 14 are equal.

[0139] Please refer to Figure 1 and Figure 27 , Figure 27 is Figure 1 a schematic diagram of the upper hemisphere efficiency of the antenna assembly shown in. The proportion of the upper hemisphere efficiency in the antenna assembly 10 is more than 50%, and in the schematic diagram of this embodiment, the proportion of the upper hemisphere efficiency in the antenna assembly 10 is 53%. In other words, the upper hemisphere radiation efficiencies of the first antenna 110 and the second antenna 120 are good, so that the first antenna 110 and the second antenna 120 have good communication efficiencies.

[0140] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: A first antenna, the first antenna including a first radiator, a first matching circuit, and a first signal source, the first radiator having a first grounding end and a first free end, the first grounding end being grounded, and the first signal source being electrically connected to the first radiator through the first matching circuit; and A second antenna, the second antenna including a second radiator, a second matching circuit, and a second signal source, the second radiator having a second grounding end and a second free end, the second grounding end being grounded, the second free end being spaced apart from the first free end and forming a coupling gap, the second radiator being coupled to the first radiator through the coupling gap, the second signal source being electrically connected to the second radiator through the second matching circuit, the second radiator further having a connection point, the second matching circuit including a frequency selection and filtering sub-circuit, a band-pass sub-circuit, and a switch, one end of the frequency selection and filtering sub-circuit being electrically connected to the connection point, the other end being grounded through the switch, the frequency selection and filtering sub-circuit being a band-stop circuit for a third frequency band and a band-pass circuit for a second frequency band; one end of the band-pass sub-circuit being electrically connected to the connection point, the other end being electrically connected to the second signal source, the band-pass sub-circuit being a band-pass circuit for the third frequency band, wherein when the switch is in an open state, the first antenna supports a first sub-band and a second sub-band in a first frequency band, wherein the frequency of the first sub-band is less than the frequency of the second sub-band; when the switch is in a closed state, the first antenna supports at least the first sub-band in the first frequency band; The first antenna is used to support a first frequency band and a second frequency band, and the second antenna is used to support a third frequency band.

2. The antenna assembly according to claim 1, wherein The frequency selection and filtering sub-circuit includes: A first inductor, one end of the first inductor being electrically connected to the connection point; A first capacitor, the first capacitor being connected in parallel with the first inductor; and A second inductor, one end of the second inductor being electrically connected to the node where the first capacitor and the first inductor are connected in parallel, and the other end being grounded.

3. The antenna assembly according to claim 1, wherein The band-pass sub-circuit includes a second capacitor and a third inductor, the second capacitor and the third inductor being connected in series; or, The band-pass sub-circuit includes a second capacitor and a third inductor, the second capacitor and the third inductor being connected in parallel.

4. The antenna assembly according to claim 1, wherein The second matching circuit further includes: A tuning sub-circuit for tuning the resonance point of the third frequency band.

5. The antenna assembly according to claim 4, characterized in that, The tuning sub-circuit includes: A first tuning unit, one end of the first tuning unit being electrically connected to the second signal source, and the other end being electrically connected to the connection point.

6. The antenna assembly according to claim 5, wherein The tuning sub-circuit further includes at least one of a second tuning unit and a third tuning unit; When the tuning sub-circuit includes a second tuning unit, one end of the second tuning unit is grounded, and the other end is electrically connected to the other end of the first tuning unit; When the tuning sub-circuit includes a third tuning unit, one end of the third tuning unit is grounded, and the other end of the third tuning unit is electrically connected to the second signal source.

7. The antenna assembly according to claim 6, wherein The first tuning unit includes a capacitor; when the tuning sub-circuit includes the second tuning unit, the second tuning unit includes a capacitor or an inductor; when the tuning sub-circuit includes the third tuning unit, the third tuning unit includes a capacitor or an inductor.

8. The antenna assembly according to claim 1, wherein When the switch is in the open state, the first antenna has a first resonance mode, a second resonance mode, and a third resonance mode. Among them, the first resonance mode is used to support the first sub-band of the first frequency band, the second resonance mode is used to support the second sub-band of the first frequency band, and the third resonance mode is used to support the second frequency band.

9. The antenna assembly according to claim 8, characterized in that, When the switch is in the closed state, the first antenna has a first resonance mode, a second resonance mode, a fourth resonance mode, and a fifth resonance mode. Among them, both the first resonance mode and the second resonance mode at least support the first sub-band in the first frequency band, and both the fourth resonance mode and the fifth resonance mode are used to support the second frequency band.

10. The antenna assembly according to claim 8 or 9, characterized in that, The current flow direction corresponding to the first resonance mode is: from the second ground end to the second free end, from the second free end through the coupling slot to the first free end, and from the first free end to the first ground end.

11. The antenna assembly according to claim 8 or 9, characterized in that, The current flow direction corresponding to the second resonance mode is: from the first signal source to the connection point of the first radiator and the first matching circuit, and flowing to the first free end, from the first free end through the coupling slot to the second free end, and from the second free end to the second ground end.

12. The antenna assembly according to claim 8, wherein The current corresponding to the third resonance mode includes: a first sub-current, the first sub-current flowing from the first ground end to the first free end; and a second sub-current, the second sub-current flowing from the second ground end to the second free end.

13. The antenna assembly according to claim 9, wherein, The current flow direction corresponding to the fourth resonance mode is: from the first signal source through the first matching circuit, the connection point of the first matching circuit and the first radiator to the first free end, through the first free end through the coupling slot to the second free end, and from the second free end to the connection point of the second radiator, the second matching circuit to the ground pole.

14. The antenna assembly according to claim 9, characterized in that, The distance d1 between the connection point of the second radiator and the second free end satisfies: 0 ≤ d1 ≤ L / 2, where L is the length of the second radiator.

15. The antenna assembly according to claim 14, characterized in that, The second radiator has a coupling end face facing the first free end. When the distance d1 between the connection point of the second radiator and the coupling end face is d1 = L / 2, the current corresponding to the fifth resonance mode includes: a third sub-current, the third sub-current from the first signal source through the first matching circuit, the connection current of the first matching circuit and the first radiator to the first free end; and a fourth sub-current, the fourth sub-current through the second matching circuit, the connection point of the second matching circuit and the second radiator to the second free end.

16. The antenna assembly according to claim 14, wherein The second radiator has a coupling end face facing the first free end. When the distance d1 between the connection point of the second radiator and the coupling end face is 0, the current corresponding to the fifth resonance mode includes: A fifth sub-current that flows from the second matching circuit to the connection point of the second radiator and flows in the direction from the connection point of the second radiator toward the second grounding end; and A sixth sub-current that flows in the direction from the second grounding end toward the first free end.

17. The antenna assembly according to claim 1, wherein, The first antenna further includes: A third radiator electrically connected to the first matching circuit. The third radiator is configured to support the second frequency band or the fourth frequency band, where the fourth frequency band is different from any of the first frequency band, the second frequency band, and the third frequency band.

18. The antenna assembly according to claim 1, wherein The first frequency band is the MHB band, the second frequency band is the UHB band, and the third frequency band is the GPS-L5 band.

19. An electronic device, characterized in that, The electronic device includes the antenna assembly according to any one of claims 1-18. The electronic device has a top and a bottom, and both the first radiator and the second radiator are disposed on the top.

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