Electronic device

Abstract

The invention provides an electronic device. The electronic equipment comprises a functional device and an antenna assembly. The antenna assembly comprises a first antenna, and the first antenna comprises a first radiator, a first feed source and a matching circuit. The first radiator is provided with a first free end, a first feeding point, a first grounding point and a first grounding end which are arranged in sequence, the first grounding point is arranged close to the functional device compared with the first grounding end, and the first grounding end is grounded; the first feed source is electrically connected to the first feed point and is used for exciting a first resonant mode of the first radiator to support a first frequency band, and the first resonant mode is a three-quarter wavelength mode from a first free end to a first grounding end; the matching circuit comprises a band-stop circuit of the first frequency band, one end of the band-stop circuit is electrically connected to the first grounding point, and the other end is grounded. The influence of the first antenna of the electronic equipment on the functional device in the first frequency band is small, and the performance of the functional device can be ensured.

Description

Technical Field

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

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, when the antenna components in electronic devices in the related art communicate, they will interfere with functional devices such as cameras arranged near the antenna components, thereby affecting the normal functions of the functional devices. Summary of the invention

[0003] In a first aspect, an embodiment of the present application provides an electronic device, the electronic device comprising:

[0004] Functional devices; and

[0005] An antenna assembly, the antenna assembly comprising a first antenna, the first antenna comprising:

[0006] A first radiator, the first radiator having a first free end, a first feeding point, a first grounding point and a first grounding end which are arranged in sequence, the first grounding point being arranged closer to the functional device than the first grounding end, and the first grounding end being grounded;

[0007] a first feed source, the first feed source being electrically connected to the first feeding point and used for exciting a first resonant mode of the first radiator to support a first frequency band, the first resonant mode being a three-quarter wavelength mode from the first free end to the first ground end; and

[0008] The matching circuit comprises a band-stop circuit of a first frequency band, one end of the band-stop circuit is electrically connected to the first ground point, and the other end is grounded.

[0009] In summary, the first antenna of the antenna assembly in the electronic device provided in the embodiment of the present application includes a band-stop circuit of the first frequency band, one end of the band-stop circuit is electrically connected to the first grounding point, and the other end is grounded, so the first grounding point is equivalent to an open circuit for the first frequency band. When the first feed source is electrically connected to the first feed point, the three-quarter wavelength mode from the first free end to the first grounding end of the first radiator is excited to support the first frequency band, that is, the entire branch of the first radiator can be used to support the first frequency band. Since the entire branch of the first radiator supports the first frequency band, the first resonant current corresponding to the first resonant mode is dispersed to the entire first radiator; in addition, since the three-quarter wavelength mode of the first radiator supports the first frequency band, the current maximum value of the first resonant current corresponding to the first resonant mode is no longer located at the first grounding point, so that the distance from the first grounding point of the functional device has little effect on the performance of the functional device, ensuring the performance of the functional device. The electronic device provided in the embodiment of the present application has good performance in the scenario where the functional device and the antenna assembly need to work at the same time, and the antenna assembly also has good antenna performance and network experience in the first frequency band. BRIEF 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 use in the embodiments 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 creative work.

[0011] Figure 1 A schematic diagram of an electronic device provided in one embodiment of the present application;

[0012] Figure 2 For one embodiment Figure 1 A schematic diagram of a portion of the structure of the electronic device shown;

[0013] Figure 3 for Figure 2 A simplified schematic diagram of a first antenna of an antenna assembly of an electronic device shown in ;

[0014] Figure 4 for Figure 3 A schematic diagram of the flow direction of the first resonant current when the first antenna supports the first frequency band;

[0015] Figure 5 A schematic diagram of a band-stop circuit provided in one embodiment of the present application;

[0016] Figure 6A schematic diagram of a band-stop circuit provided in another embodiment of the present application;

[0017] Figure 7 for Figure 3 Schematic diagram of the flow direction of the second resonant current when the first antenna supports the second frequency band;

[0018] Figure 8 A schematic diagram of a partial structure of an electronic device provided in another embodiment of the present application;

[0019] Fig. 9 A schematic diagram of an electronic device provided in yet another embodiment of the present application;

[0020] Fig.10 for Fig. 9 A schematic diagram of a portion of the structure of the electronic equipment provided;

[0021] Fig.11 for Fig.10 A simplified schematic diagram of an electronic device antenna assembly shown in;

[0022] Fig.12 for Fig.11 A schematic diagram of a third resonant current in the antenna assembly shown in ;

[0023] Fig.13 for Fig.11 A schematic diagram of a fourth resonant current in the antenna assembly shown in ;

[0024] Fig.14 A front view of the structure of an electronic device in the related art;

[0025] Fig.15 for Fig.14 A rear view of a partial structure of an electronic device;

[0026] Fig.16 for Fig.14 A simulation curve diagram of the coupling current value of the signal line of the flexible circuit board of the functional device of the electronic device;

[0027] Fig.17 for Fig.14 A schematic diagram of the distribution of coupling current of a signal line of a flexible circuit board of a functional device of an electronic device;

[0028] Fig.18 A simulation curve diagram of the coupling current value of a signal line of a flexible circuit board of a functional device of an electronic device provided in one embodiment of the present application;

[0029] Fig.19 A simulation diagram of the coupling current value of a signal line of a flexible circuit board of a functional device of an electronic device provided in one embodiment of the present application;

[0030] Fig. 20 The present invention provides simulation curves under different parameters in the band-stop circuit of the electronic device in the related art and the electronic device in the embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0032] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0033] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0034] Before introducing the electronic device provided by the implementation method of the present application, the electronic device provided by the implementation method of the related technology (which should not be understood as the prior art) is first introduced.

[0035] In the related art, an electronic device includes an antenna assembly and a functional device. Take the functional device including a camera as an example for explanation. The camera is used to realize the photo or video shooting function of the electronic device. When the camera is working, it is easily interfered by various interference sources (such as antenna assemblies) in the electronic device, resulting in low quality of the captured image or video. Generally speaking, the camera usually adopts a high-speed physical layer interface standard (MIPI C-Physical Layer, C-PHY) to transmit data, which is easily interfered and affects normal operation. For example, noise, stripes, color distortion and other defects will appear in the image or video captured by the camera. In severe cases, the data transmission during shooting by the camera will be interrupted. It can be seen that when the camera in the related art is working, it is easily interfered by interference sources such as antenna assemblies, which affects the normal function of the camera.

[0036] In the related art, electronic devices take some anti-interference measures to improve the functions of functional devices such as the camera. For example, when the camera of the electronic device is turned on to start working, the processor of the electronic device reduces the output power of the RF chip of the antenna assembly to reduce the radiation energy of the antenna assembly supporting the target frequency band.

[0037] In the related art, when the camera of the electronic device is turned on and starts working, the output power of the RF chip of the antenna assembly is reduced to reduce the radiation energy of the antenna supporting the target frequency band. Although the risk of the camera being interfered with by the RF signal of the antenna assembly can be reduced, the output power of the RF chip is reduced (for example, reduced by 1dB to 3dB), which will affect the user's network experience. For example, when the electronic device is in a scenario where the antenna assembly and the camera are required to work at the same time, it will affect the user's network experience. For example, in a live video broadcast scenario, a camera and an antenna assembly are required. The reduction in the output power of the RF chip of the antenna assembly in the related art will affect the network experience during live video broadcast.

[0038] Although the functional device in the related art is introduced by taking the camera of the electronic device as an example, it can be understood that it should not be construed as a limitation on the functional device of the electronic device provided in the embodiment of the present application.

[0039] An embodiment of the present application provides an electronic device 1. The electronic device 1 includes but is not limited to a mobile phone, a telephone, a television, a tablet computer (Pad), a personal computer, a laptop computer (Personal Computer, PC), a vehicle-mounted device, a headset, a watch, a wearable device, and other devices capable of transmitting and receiving electromagnetic wave signals. In the schematic diagram of the embodiment of the present application, the electronic device 1 is illustrated as a mobile phone as an example, which should be understood that it should not be understood as a limitation on the electronic device 1 provided in the embodiment of the present application. Next, the electronic device 1 provided in the embodiment of the present application is introduced.

[0040] Please also read Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A schematic diagram of an electronic device provided in one embodiment of the present application; Figure 2 For one embodiment Figure 1 A schematic diagram of a portion of the structure of the electronic device shown; Figure 3 for Figure 2 A simplified schematic diagram of a first antenna of an antenna assembly of an electronic device shown in ; Figure 4 for Figure 3 Schematic diagram of the flow direction of the first resonant current when the first antenna supports the first frequency band. Figure 1 The electronic device 1 shown is a front view of the electronic device 1; Figure 2 for Figure 1 The electronic device 1 is a rear view of a partial structure. The electronic device 1 includes a functional device 20 and an antenna assembly 10. The antenna assembly 10 includes a first antenna 110. The first antenna 110 includes a first radiator 111, a first feed source S1 and a matching circuit 112. The first radiator 111 has a first free end 1111, a first feeding point P1, a first grounding point G1 and a first grounding end 1112 arranged in sequence. The first grounding point G1 is arranged adjacent to the functional device 20 compared to the first grounding end 1112. The first grounding end 1112 is grounded. The first feed source S1 is electrically connected to the first feeding point P1, and is used to excite the first resonant mode of the first radiator 111 to support a first frequency band. The first resonant mode is a three-quarter wavelength mode from the first free end 1111 to the first grounding end 1112. The matching circuit 112 includes a band-stop circuit 1121 of the first frequency band, one end of the band-stop circuit 1121 is electrically connected to the first grounding point G1, and the other end is grounded.

[0041] The functional device 20 includes but is not limited to a camera. In the schematic diagram of the present embodiment, the camera is taken as a front camera for example. It can be understood that in other embodiments, the camera can also be a rear camera. The camera usually uses a high-speed physical layer interface standard (MIPI C-Physical Layer, C-PHY) to transmit data. The transmission rate of the camera when transmitting data is relatively high, and the transmission rate is usually from MHz level to GHz level. The operating frequency band supported by the antenna assembly 10 is usually greater than or equal to 700MHz, and the operating frequency band supported by the antenna assembly 10 overlaps with the transmission rate when the camera transmits data. Therefore, the camera data is easily interfered by the antenna assembly 10. In summary, when the transmission rate of the data transmitted by the functional device 20 in the electronic device 1 overlaps with the transmission rate of the operating frequency band supported by the antenna assembly 10, the functional device 20 is easily interfered by the antenna assembly 10.

[0042] In this embodiment, the electronic device 1 further includes a flexible circuit board 40, and the flexible circuit board 40 is electrically connected to the functional device 20. For example, the functional device 20 may be located on one side of the flexible circuit board 40.

[0043] Generally speaking, the electronic device 1 also includes a receiver (REC), the transmission rate of the receiver is relatively low, usually below the KHz level, and is relatively less likely to be interfered by the antenna assembly 10.

[0044] The first radiator 111 may be, but is not limited to, a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the first radiator 111 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first radiator 111 may be formed using the middle frame 30 (see FIG. 1 ) formed of plastic and metal of the electronic device 1. Figure 1 In addition, the first radiator 111 may also be a frame radiator designed by the metal middle frame 30.

[0045] The first grounding point G1 is arranged closer to the functional device 20 than the first grounding terminal 1112, so the current at the first grounding point G1 will affect the performance of the functional device 20. If the current at the first grounding point G1 is large, the performance of the functional device 20 will be affected. If the current at the first grounding point G1 is small, the performance of the functional device 20 will be less affected or even not affected. The electronic device 1 provided in the related art and the electronic device 1 provided in the embodiment of the present application will be described in detail later in conjunction with the simulation diagram.

[0046] The matching circuit 112 includes a band-stop circuit 1121 of the first frequency band, one end of the band-stop circuit 1121 is electrically connected to the first ground point G1, and the other end is grounded. In other words, the first ground point G1 is grounded through the band-stop circuit 1121. It should be noted that the other end of the band-stop circuit 1121 is grounded, including the other end of the band-stop circuit 1121 being directly connected to the ground, or the other end of the band-stop circuit 1121 being indirectly connected to the ground through other devices.

[0047] The first grounding point G1 can be electrically connected to the one end of the band-stop circuit 1121 through a connecting member (such as a conductive spring, or a conductive glue, or a conductive screw). In this embodiment, the first grounding point G1 is electrically connected to the one end of the band-stop circuit 1121 through a conductive spring.

[0048] The band-stop circuit 1121 is a band-stop circuit 1121 of the first frequency band, and therefore, the band-stop circuit 1121 can filter out the first resonant current I1 corresponding to the first frequency band. In other words, the band-stop circuit 1121 is equivalent to an open circuit for the first frequency band. Therefore, the first resonant current I1 cannot be grounded at the first grounding point G1, and the first resonant current I1 is grounded at the first grounding end 1112.

[0049] The first grounding terminal 1112 is electrically connected to the ground electrode, and the first grounding terminal 1112 may be grounded in a manner that is, but not limited to, electrically connected to the ground electrode through a grounding member. The grounding member may be, but not limited to, a conductive spring, or a conductive glue, or a conductive screw, or a connecting rib, etc. In this embodiment, the grounding member is a connecting rib as an example for illustration.

[0050] The first feed source S1 may be electrically connected to the first feed point P1 by, but not limited to, a feed component, etc. The feed component may be, but not limited to, a conductive spring, conductive glue, conductive screw, or connecting rib, etc.

[0051] For the convenience of description, the resonant current when the first resonant mode supports the first frequency band is named as the first resonant current I1. The first resonant mode is a three-quarter wavelength mode from the first free end 1111 to the first ground end 1112. Therefore, the first resonant current I1 is distributed between the first free end 1111 and the first ground end 1112. Figure 4 In the current half-wavelength period shown, the first resonant current I1 flows from the first ground terminal 1112 to the first free terminal 1111 as an example. It can be understood that the first resonant current I1 changes periodically, and in the next half-wavelength period, the first resonant current I1 flows from the first free terminal 1111 to the first ground terminal 1112.

[0052] It should be noted that the "wavelength" of the first resonant mode in the three-quarter wavelength mode from the first free end 1111 to the first ground end 1112 refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the first frequency band.

[0053] The first resonant mode is a three-quarter wavelength mode from the first free end 1111 to the first ground end 1112. It can be seen that when the first antenna 110 supports the first frequency band, the entire radiation branch of the first radiator 111 is used. Therefore, the first resonant current I1 when the first resonant mode supports the first frequency band is relatively dispersed, so that the current at the first ground point G1 is small, and the first ground point G1 has little effect on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. Therefore, in the scenario where the functional device 20 and the antenna assembly 10 need to work at the same time, it can meet the requirements that the functional device 20 has good performance, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0054] In summary, the first antenna 110 of the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, one end of the band-stop circuit 1121 is electrically connected to the first ground point G1, and the other end is grounded, so the first ground point G1 is equivalent to an open circuit for the first frequency band. When the first feed source S1 is electrically connected to the first feeding point P1, the three-quarter wavelength mode from the first free end 1111 to the first ground end 1112 of the first radiator 111 is stimulated to support the first frequency band, that is, the entire branch of the first radiator 111 can be used to support the first frequency band. Since the entire branch of the first radiator 111 supports the first frequency band, the first resonant current I1 corresponding to the first resonant mode is dispersed to the entire first radiator 111; in addition, since the three-quarter wavelength mode of the first radiator 111 supports the first frequency band, the current maximum value of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so that the distance from the first grounding point G1 of the functional device 20 has little effect on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. The electronic device 1 provided in the embodiment of the present application has good performance in the scenario where the functional device 20 and the antenna assembly 10 need to work simultaneously, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0055] See also Figure 5 , Figure 5 Schematic diagram of a band-stop circuit provided in one embodiment of the present application. In this embodiment, the band-stop circuit 1121 includes a first inductor 112a and a filter capacitor 112b. One end of the first inductor 112a is electrically connected to the first ground point G1, and the other end is grounded. The filter capacitor 112b is connected in parallel with the first inductor 112a.

[0056] In this embodiment, the band-stop circuit 1121 includes a first inductor 112a and a filter capacitor 112b, the filter capacitor 112b is connected in parallel with the first inductor 112a, and the first grounding point G1 is equivalent to an open circuit for the first frequency band. The first resonant current I1 of the first resonant mode is less or cannot be grounded through the first grounding point G1, but is grounded through the first grounding terminal 1112. Therefore, the current maximum of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so that the distance from the first grounding point G1 of the functional device 20 has little effect on the performance of the functional device 20, ensuring the performance of the functional device 20. The electronic device 1 provided in the embodiment of the present application has good performance in the scenario where the functional device 20 and the antenna assembly 10 need to work at the same time, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band. In addition, the band-stop circuit 1121 includes the first inductor 112a and the filter capacitor 112b, and the circuit is simple and easy.

[0057] In one embodiment, the first frequency band includes the N78 frequency band. The inductance value L1 of the first inductor 112a satisfies: 1nH≤L1≤8.2nH; the capacitance value C0 of the filter capacitor 112b satisfies: 0.3pF≤C0≤2.2pF.

[0058] The inductance L1 of the first inductor 112a may be, but is not limited to, 1nH, 1.5nH, 2.0nH, 2.5nH, 3.0nH, 3.5nH, 3.9nH, 4.0nH, 4.5nH, 5.0nH, 5.1nH, 5.5nH, 6.0nH, 6.5nH, 7.0nH, 7.5nH, 8.0nH, or 8.2nH.

[0059] The capacitance value C0 of the filter capacitor 112 b may be, but is not limited to, 0.3 pF, 0.5 pF, 0.8 pF, 1.0 pF, 1.2 pF, 1.5 pF, 1.8 pF, 2.0 pF, or 2.2 pF.

[0060] The first frequency band includes the N78 frequency band, and the inductance value L1 of the first inductor 112a satisfies: 1nH≤L1≤8.2nH; the capacitance value C0 of the filter capacitor 112b satisfies: 0.3pF≤C0≤2.2pF, so that the band-stop filter circuit can filter the signal of the N78 frequency band better. The electronic device 1 provided in the embodiment of the present application selects the inductance value of the first inductor 112a and the capacitance value of the filter capacitor 112b, so that the first resonant current I1 of the first resonant mode is less or cannot be grounded through the first grounding point G1, but is grounded through the first grounding terminal 1112. Therefore, the current maximum value of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so that the distance from the first grounding point G1 of the functional device 20 has less influence on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. The electronic device 1 provided in the embodiment of the present application has good performance in a scenario where the functional device 20 and the antenna assembly 10 need to work simultaneously, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0061] Later, the coupling current of the functional device 20 (taking the functional device 20 as a front camera as an example for simulation) under the corresponding values ​​of the first inductor 112a and the filter capacitor 112b will be simulated and explained in conjunction with the simulation diagram.

[0062] Further, in one embodiment, the first frequency band includes the N78 frequency band. The inductance value L1 of the first inductor 112a satisfies: 2nH≤L1≤5.1nH; the capacitance value C0 of the filter capacitor 112b satisfies: 0.3pF≤C0≤1.0pF.

[0063] The inductance L1 of the first inductor 112a may be, but is not limited to, 2.0 nH, 2.5 nH, 3.0 nH, 3.5 nH, 3.9 nH, 4.0 nH, 4.5 nH, 5.0 nH, or 5.1 nH.

[0064] The capacitance value C0 of the filter capacitor 112 b may be, but is not limited to, 0.3 pF, 0.5 pF, 0.8 pF, or 1.0 pF.

[0065] The first frequency band includes the N78 frequency band, and the inductance value L1 of the first inductor 112a satisfies: 2nH≤L1≤5.1nH; the capacitance value C0 of the filter capacitor 112b satisfies: 0.3pF≤C0≤1.0pF, which can further improve the filtering effect of the band-stop filter circuit on the signal of the N78 frequency band. The electronic device 1 provided in the embodiment of the present application selects the inductance value of the first inductor 112a and the capacitance value of the filter capacitor 112b, so that the first resonant current I1 of the first resonant mode is less or cannot be grounded through the first grounding point G1, but is grounded through the first grounding terminal 1112. Therefore, the current maximum value of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so that the distance from the first grounding point G1 of the functional device 20 has less influence on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. The electronic device 1 provided in the embodiment of the present application has good performance in a scenario where the functional device 20 and the antenna assembly 10 need to work simultaneously, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0066] See also Figure 6 , Figure 6 Schematic diagram of a band-stop circuit provided in another embodiment of the present application. In this embodiment, the band-stop circuit 1121 includes a first inductor 112a and a filter capacitor 112b. One end of the first inductor 112a is electrically connected to the first grounding point G1, and the other end is grounded. The filter capacitor 112b is connected in parallel with the first inductor 112a. Further, the matching circuit 112 also includes a second inductor 1122. The other end of the first inductor 112a is electrically connected to the second inductor 1122 to the ground.

[0067] The other end of the first inductor 112a is electrically connected to the second inductor 1122 and ground. In other words, the band-stop circuit 1121 is connected in series with the second inductor 1122 and ground.

[0068] The band-stop circuit 1121 can be equivalent to a small inductor for the second frequency band. The matching circuit 112 in the electronic device 1 provided in the embodiment of the present application includes a second inductor 1122, and the other end of the first inductor 112a in the band-stop circuit 1121 is electrically connected to the second inductor 1122 to the ground. Therefore, the matching circuit 112 is equivalent to a very small vertical inductor for the second frequency band, which is approximately a short circuit, so that the antenna efficiency of the second frequency band is higher and does not affect the filtering effect of the first frequency band.

[0069] See also Figure 7 , Figure 7 for Figure 3Schematic diagram of the flow direction of the second resonant current when the first antenna supports the second frequency band. The first feed source S1 is also used to excite the second resonant mode of the first radiation to support the second frequency band. The second resonant mode is a quarter-wavelength mode from the first feeding point P1 to the first free end 1111, and the frequency of the second frequency band is greater than the frequency of the first frequency band.

[0070] For the convenience of description, the resonant current corresponding to the second resonant mode is named as the second resonant current I2. Figure 7 In the current half-wavelength period shown, the second resonant current I2 flows from the first feeding point P1 to the first free end 1111 as an example. It can be understood that the second resonant current I2 changes periodically, and in the next half-wavelength period, the second resonant current I2 flows from the first free end 1111 to the first feeding point P1.

[0071] It should be noted that the "wavelength" of the second resonant mode is the quarter-wavelength mode from the first feeding point P1 to the first free end 1111, which refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the second frequency band.

[0072] The quarter-wavelength mode is also called the fundamental mode, and the fundamental mode has good radiation efficiency. The second resonant mode is a quarter-wavelength mode from the first feeding point P1 to the first free end 1111, and therefore, it can also be said that the first radiator 111 supports the second frequency band using the fundamental mode from the first feeding point P1 to the first free end 1111. The first antenna 110 has high radiation efficiency in the second frequency band.

[0073] In one embodiment, the first frequency band includes the N78 frequency band, and the second frequency band includes the WiFi 5G frequency band.

[0074] The first frequency band includes the N78 frequency band, and the second frequency band includes the WiFi 5G frequency band, so that the first antenna 110 of the antenna assembly 10 can meet the communication requirements of the N78 frequency band and the WiFi 5G frequency band. As can be seen from the previous introduction, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application can work simultaneously with the functional device 20 in the N78 frequency band, and the antenna assembly 10 has little effect on the functional device 20. Therefore, the functional device 20 has better performance, and the antenna assembly 10 also has better antenna performance and network experience in the N78 frequency band. In addition, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application can also realize communication in the WiFi 5G frequency band.

[0075] In another embodiment, the first frequency band includes a WiFi 2.4G frequency band, and the second frequency band includes a WiFi 5G frequency band.

[0076] The first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the WiFi 5G frequency band, so that the first antenna 110 of the antenna assembly 10 can meet the communication requirements of the WiFi 2.4G frequency band and the WiFi 5G frequency band. As can be seen from the previous introduction, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application can work simultaneously with the functional device 20 in the WiFi 2.4G frequency band, and the antenna assembly 10 has little effect on the functional device 20. Therefore, the functional device 20 has better performance, and the antenna assembly 10 also has better antenna performance and network experience in the WiFi 2.4G frequency band. In addition, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application can also realize communication in the WiFi5G frequency band.

[0077] For further information, see Figure 8 , Figure 8 A partial structural diagram of an electronic device provided in another embodiment of the present application. In this embodiment, the electronic device 1 further includes a flexible circuit board 40. The flexible circuit board 40 includes a signal line 410, the signal line 410 is electrically connected to the functional device 20, and the first grounding point G1 is arranged adjacent to the signal line 410 compared to the first grounding end 1112. When the first antenna 110 supports the first frequency band, the coupling current I0 of the signal line 410 satisfies: I0≤185mA.

[0078] The signal line 410 is also called a MIPI line or an FPC cable. The signal line 410 is electrically connected to the functional device 20 for transmitting a signal to the functional device 20 and / or the functional device 20 transmits a signal to the signal line 410 .

[0079] The coupling current may be, but is not limited to, 9 mA, or 10 mA, or 15 mA, or 20 mA, or 25 mA, or 30 mA, or 35 mA, or 40 mA, or 45 mA, or 50 mA, or 55 mA, or 60 mA, or 65 mA, or 69 mA, or 70 mA, or 75 mA, or 80 mA, or 85 mA, or 90 mA, or 95 mA. Or 100mA, or 105mA, or 110mA, or 115mA, or 120mA, or 125mA, or 130mA, or 135mA, or 140mA, or 145mA, or 150mA, or 155mA, or 160mA, or 165mA, or 170mA, or 175mA, or 180mA, or 181mA, or 185mA. The coupling current will be simulated and explained later in combination with the specific values ​​of the first inductor 112a and the coupling capacitor in the band-stop circuit 1121.

[0080] In the related art, the coupling current is usually greater than 200mA. In the electronic device 1 provided in the embodiment of the present application, when the first antenna 110 supports the first frequency band, the coupling current I0 of the signal line 410 satisfies: I0≤185mA, which reduces the magnitude of the coupling current. Therefore, the coupling current generated by the signal line 410 coupling the first grounding point G1 is small. In other words, the first grounding point G1 has little effect on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. In the electronic device 1 provided in the embodiment of the present application, in a scenario where the functional device 20 and the antenna assembly 10 need to work at the same time, the functional device 20 has better performance, and the antenna assembly 10 also has better antenna performance and network experience in the first frequency band.

[0081] Optionally, in one implementation, the coupling current is less than or equal to 70 mA.

[0082] For example, the coupling current may be, but is not limited to, 9 mA, 10 mA, 15 mA, 20 mA, 25 mA, 30 mA, 35 mA, 40 mA, 45 mA, 50 mA, 55 mA, 60 mA, 65 mA, 69 mA, or 70 mA.

[0083] When the coupling current is less than or equal to 70 mA, the coupling current generated by the signal line 410 coupling the first ground point G1 is smaller. In other words, the first ground point G1 has less impact on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. The electronic device 1 provided in the embodiment of the present application has good performance in a scenario where the functional device 20 and the antenna assembly 10 need to work simultaneously, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0084] In summary, the first grounding point G1 is arranged adjacent to the signal line 410 compared to the first grounding end 1112. When the first antenna 110 operates in the first frequency band, the signal line 410 is coupled with the first grounding point G1 of the first radiator 111 and other parts adjacent to the signal line 410 to generate a coupling current. Since the first antenna 110 of the electronic device 1 provided in the embodiment of the present application also includes a band-stop circuit 1121 of the first frequency band, and the three-quarter wavelength mode of the first radiator 111 supports the first frequency band, the current maximum of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so the coupling current generated by the signal line 410 coupling the first grounding point G1 is small. In other words, the first grounding point G1 has little effect on the performance of the functional device 20, thereby ensuring the performance of the functional device 20. In the electronic device 1 provided in the embodiment of the present application, in the scenario where the functional device 20 and the antenna assembly 10 need to work simultaneously, the functional device 20 has good performance, and the antenna assembly 10 also has good antenna performance and network experience in the first frequency band.

[0085] See also Fig. 9 , Fig.10 and Fig.11 , Fig. 9 A schematic diagram of an electronic device provided in yet another embodiment of the present application; Fig.10 for Fig. 9 A schematic diagram of a portion of the structure of the electronic equipment provided; Fig.11 for Fig.10 A simplified schematic diagram of an electronic device antenna assembly is shown in FIG. Fig. 9 The electronic device 1 shown is a front view of the electronic device 1; Fig.11 for Fig. 9The back view of the partial structure of the electronic device 1 shown in FIG. 1 is a diagram of a rear view of the electronic device 1 shown in FIG. 1. In the electronic device 1 provided in this embodiment, the antenna assembly 10 further includes a second antenna 120. The antenna assembly 10 further includes a second antenna 120 which can be combined with the electronic device 1 provided in any of the previous embodiments. In the schematic diagram of this embodiment, the antenna assembly 10 further includes a second antenna 120 which is combined with the electronic device 1 provided in the previous embodiment for illustration. It can be understood that this should not be understood as a limitation on the electronic device 1 provided in the embodiment of the present application. The second antenna 120 includes a parasitic radiator 121, a second radiator 122 and a second feed source S2. The parasitic radiator 121 includes the first ground terminal 1112 and the coupling terminal 1211 arranged in sequence. The second radiator 122 includes a second free terminal 1221, a second feeding point P2 and a second ground terminal 1222 arranged in sequence. The second free terminal 1221 and the coupling terminal 1211 are arranged with a coupling slot 121a spaced apart from each other, and the second radiator 122 is coupled to the parasitic radiator 121 through the coupling slot 121a. The second feed source S2 is electrically connected to the second feeding point P2 to excite a third resonance mode to support a third frequency band, wherein the third resonance mode includes a quarter-wavelength mode from the second feeding point P2 to the coupling slot 121 a and a quarter-wavelength mode of the parasitic radiator 121 .

[0086] The parasitic radiator 121 may be, but is not limited to, a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the parasitic radiator 121 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the parasitic radiator 121 may be formed using the plastic and metal middle frame 30 of the electronic device 1 (see Fig. 9 In addition, the parasitic radiator 121 may also be a frame radiator designed by the metal middle frame 30.

[0087] The parasitic radiator 121 includes the first ground terminal 1112. It can be seen that the parasitic radiator 121 and the first radiator 111 share the same first ground terminal 1112. Therefore, the antenna assembly 10 provided in the embodiment of the present application has a relatively compact structure.

[0088] The second radiator 122 may be, but is not limited to, a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the second radiator 122 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second radiator 122 may be formed using the middle frame 30 (see FIG. 1 ) formed of plastic and metal of the electronic device 1. Fig. 9 In addition, the second radiator 122 can also be a frame radiator designed by the metal middle frame 30.

[0089] The second free end 1221 and the coupling end 1211 are arranged with a coupling gap 121a therebetween, so that the parasitic radiator 121 can be coupled with the second radiator 122 through the coupling gap 121a; correspondingly, the second radiator 122 is coupled with the parasitic radiator 121 through the coupling gap 121a.

[0090] The second grounding terminal 1222 is electrically connected to the ground electrode, and the second grounding terminal 1222 is grounded in a manner that is, but not limited to, electrically connected to the ground electrode through a grounding member. The grounding member may be, but not limited to, a conductive spring, or a conductive glue, or a conductive screw, or a connecting rib, etc. In this embodiment, the grounding member is a connecting rib as an example for illustration.

[0091] The second feed source S2 may be electrically connected to the second feed point P2 by, but is not limited to, the second feed source S2 being electrically connected to the second feed point P2 via a feeder, etc. The feeder may be, but is not limited to, a conductive spring, conductive glue, conductive screw, connecting rib, etc.

[0092] See also Fig.12 , Fig.12 for Fig.11 Schematic diagram of the third resonant current in the antenna assembly shown in . For the convenience of description, the resonant current when the third resonant mode supports the third frequency band is named as the third resonant current I3. The third resonant current I3 includes a first sub-resonant current I31 and a second sub-resonant current I32. The first sub-resonant current I31 is located at the coupling gap 121a of the second feeding point P2, and the second sub-resonant current I32 is located at the first ground terminal 1112 and the coupling terminal 1211 of the parasitic radiator 121.

[0093] exist Fig.12 In the current half-wavelength period shown, the first sub-resonant current I31 flows from the second feeding point P2 to the coupling slot 121a as an example. It can be understood that the first sub-resonant current I31 is periodic, and in the next half-wavelength period, the first sub-resonant current I31 flows from the coupling slot 121a to the second feeding point P2.

[0094] exist Fig.12 In the current half-wavelength period shown, the second sub-resonant current I32 flows from the first ground terminal 1112 to the coupling terminal 1211 as an example. It can be understood that the second sub-resonant current I32 is periodic, and in the next half-wavelength period, the second sub-resonant current I32 flows from the coupling terminal 1211 to the first ground terminal 1112.

[0095] It should be noted that, in this embodiment, the third resonant mode includes a quarter-wavelength mode from the second feeding point P2 to the coupling slot 121a and a quarter-wavelength mode of the parasitic radiator 121, and the "wavelength" refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the third frequency band.

[0096] The quarter-wavelength mode is also called the fundamental mode, and the fundamental mode has good radiation efficiency. The third resonant mode includes the quarter-wavelength mode from the second feeding point P2 to the coupling slot 121a and the quarter-wavelength mode of the parasitic radiator 121. Therefore, it can also be said that the second radiator 122 supports the third frequency band using the fundamental mode from the second feeding point P2 to the coupling slot 121a and the fundamental mode of the entire radiation branch of the parasitic radiator 121. The second antenna 120 has a high radiation efficiency in the third frequency band.

[0097] In one embodiment, the third frequency band includes a high frequency band, such as B41 in the high frequency band. It is understandable that in other embodiments, the third frequency band is not limited to the high frequency band, and the third frequency band may also be other frequency bands. When the third frequency band includes the high frequency band, the antenna assembly 10 can meet the communication requirements of the high frequency band.

[0098] See also Fig.13 , Fig.13 for Fig.11 Schematic diagram of the fourth resonant current in the antenna assembly shown in . Further, the second feed source S2 also excites the fourth resonant mode of the second radiator 122 to support a fourth frequency band, wherein the fourth resonant mode includes a quarter-wavelength mode from the second ground terminal 1222 to the coupling slot 121a.

[0099] For the convenience of description, the resonant current when the fourth resonant mode supports the fourth frequency band is named as the fourth resonant current I4. Fig.13 In the current half-wavelength period shown, the fourth resonant current I4 flows from the second ground terminal 1222 to the coupling slot 121a as an example. It can be understood that the fourth resonant current I4 is periodic, and in the next half-wavelength period, the fourth resonant current I4 flows from the coupling slot 121a to the second ground terminal 1222.

[0100] It should be noted that, in this embodiment, the "wavelength" in the quarter-wavelength mode from the second ground end 1222 to the coupling slot 121a in the fourth resonant mode refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the fourth frequency band.

[0101] The quarter-wavelength mode is also called the fundamental mode, and the fundamental mode has good radiation efficiency. The fourth resonant mode includes the quarter-wavelength mode from the second ground end 1222 to the coupling slot 121a, and therefore, it can also be said that the second radiator 122 supports the fourth frequency band using the fundamental mode from the second feeding point P2 to the coupling slot 121a. The second antenna 120 has a high radiation efficiency in the fourth frequency band.

[0102] In one embodiment, the fourth frequency band includes an intermediate frequency band, such as at least one of the B1 frequency band and the B3 frequency band in the intermediate frequency band. It can be understood that in other embodiments, the fourth frequency band is not limited to the intermediate frequency band, and the fourth frequency band can also be other frequency bands. When the third frequency band includes the intermediate frequency band, the antenna assembly 10 can meet the communication requirements of the intermediate frequency band.

[0103] Next, the performance of the electronic device 1 in the related art and the performance of the electronic device 1 provided in the embodiment of the present application are simulated and described.

[0104] First, the structure of the electronic device 1 in the related art is described, and the performance of the electronic device 1 in the related art is simulated. Fig.14 , Fig.15 Fig.16 and Fig.17 , Fig.14 A front view of the structure of an electronic device in the related art; Fig.15 for Fig.14 A rear view of a partial structure of an electronic device; Fig.16 for Fig.14 A simulation curve diagram of the coupling current value of the signal line of the flexible circuit board of the functional device of the electronic device; Fig.17 for Fig.14Schematic diagram of the distribution of coupling current of the signal line of the flexible circuit board of the functional device of the electronic device in the related art. In the related art, the electronic device 1 includes an antenna assembly 10 and a functional device 20. The antenna assembly 10 includes a first antenna 110. The functional device 20 can be, but is not limited to, a front camera. The first antenna 110 includes a first radiator 111 and a first feed source S1. The first radiator 111 includes a first free end 1111, a first feeding point P1 and a first grounding point G1 arranged in sequence. The first grounding point G1 is grounded to zero ohm (0Ω) through a ground spring, and the antenna assembly 10 in the related art does not include a band-stop circuit for the first frequency band. In the antenna assembly 10 of the electronic device 1 in the related art, the first feed source S1 is electrically connected to the first feeding point P1 to excite the first frequency band, wherein the resonant mode of the first frequency band is a quarter-wavelength mode from the first grounding point G1 to the first free end 1111. When the first radiator 111 is formed in the frame of the middle frame 30 in the electronic device 1, the frame has a gap to define the first free end 1111. Therefore, the resonance mode of the first frequency band is also called a quarter wavelength mode from the first ground point G1 to the gap.

[0105] In the electronic device 1 in the related art, the resonance mode of the first frequency band is a quarter-wavelength mode from the first ground point G1 to the first free end 1111, so the current at the lower ground spring at the first ground point G1 is the largest. Since the distance between the first ground point G1 and the lower ground spring and the signal line 410 of the flexible circuit board 40 of the functional device 20 is relatively close, the radio frequency signal of the first ground point G1 and the lower ground spring will be coupled to the signal line 410 of the flexible circuit board 40 of the functional device 20, thereby interfering with the signal line 410 of the flexible circuit board 40, and affecting the demodulation of the signal received from the signal line 410 by the functional device 20.

[0106] For convenience, Fig.17 (a) is a color image. Fig.17 (b) in Fig.17 The grayscale image of (a) in . Fig.17 In (a), the redder the color, the greater the current. Fig.17 As can be seen in the red box in (a), the coupling current of the signal line 410 (MIPI signal line, also called FPC cable) on the flexible circuit board 40 connected to the functional device 20 is relatively concentrated. Fig.16 , the maximum value of the coupling current is 244 mA. The large coupling current indicates that the coupling energy at the signal line 410 is large, and the risk of the functional device 20 being interfered by the radiation signal of the first frequency band is high.

[0107] When simulating the related technology, the simulation is performed by taking the first frequency band including the N78 frequency band as an example.

[0108] Next, the performance of the electronic device 1 provided in the embodiment of the present application is simulated and described. Figure 5 , Figure 6 , Fig.18 and Fig.19 , Fig.18 A simulation curve diagram of the coupling current value of a signal line of a flexible circuit board of a functional device of an electronic device provided in one embodiment of the present application;

[0109] Fig.19 A simulation diagram of the coupling current value of the signal line of the flexible circuit board of the functional device of the electronic device provided in one embodiment of the present application. In the simulation, the first frequency band includes the N78 frequency band, and the inductance value of the first inductor 112a in the band-stop circuit 1121 is 3.9nH, and the capacitance value of the filter capacitor 112b is 0.5pF.

[0110] Since the first antenna 110 of the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, one end of the band-stop circuit 1121 is electrically connected to the first ground point G1, and the other end is grounded, therefore, the first ground point G1 is equivalent to an open circuit for the first frequency band. When the first feed source S1 is electrically connected to the first feeding point P1, the three-quarter wavelength mode from the first free end 1111 to the first ground end 1112 of the first radiator 111 is stimulated to support the first frequency band, that is, the entire branch of the first radiator 111 can be used to support the first frequency band. Since the entire branch of the first radiator 111 supports the first frequency band, the first resonant current I1 corresponding to the first resonant mode is dispersed to the entire first radiator 111; in addition, since the three-quarter wavelength mode of the first radiator 111 supports the first frequency band, the maximum current of the first resonant current I1 corresponding to the first resonant mode is no longer located at the first grounding point G1, so that the distance from the first grounding point G1 of the functional device 20 has less impact on the performance of the functional device 20, thereby ensuring the performance of the functional device 20.

[0111] exist Fig.18 As can be seen from the figure, the coupling current value of the signal line 410 of the flexible circuit board 40 of the functional device 20 of the electronic device 1 provided in the embodiment of the present application is relatively small. The coupling current value is reduced to 7 mA, which is significantly reduced compared with the coupling current value in the related art.

[0112] For convenience, Fig.19 (a) is a color image. Fig.19(b) in Fig.19 The grayscale image of (a) in . Fig.19 In (a), the redder the color, the greater the current. Fig.19 As can be seen in the red box in (a), the coupling current of the signal line 410 (MIPI signal line 410, also called FPC cable) on the flexible circuit board 40 connected to the functional device 20 is small. Fig.18 , the maximum value of the coupling current is 7 mA. The smaller the coupling current, the smaller the coupling energy at the signal line 410 is, and the smaller the risk of the functional device 20 being interfered by the radiation signal of the first frequency band is.

[0113] See also Fig. 20 , Fig. 20 The simulation curves under different parameters of the band-stop circuit in the electronic device in the related art and the electronic device provided in the embodiment of the present application are shown in FIG. Fig. 20 (a) is a color image. Fig. 20 (b) in Fig. 20 The grayscale image of (a) in the figure. Among them, curve ①( Fig. 20 The green curve in (a) is a coupling current curve of the signal line 410 on the flexible circuit board 40 connected to the functional device 20 in the first frequency band when the antenna assembly 10 of the electronic device 1 in the related art is grounded at the first grounding point G1 through a zero ohm (0Ω) spring. As can be seen from curve ①, the coupling current in the N78 frequency band is 244mA.

[0114] Curve ②( Fig. 20 The red curve in (a) is a coupling current curve on the signal line 410 on the flexible circuit board 40 connected to the functional device 20 when the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, and the inductance value of the first inductor 112a of the band-stop circuit 1121 is 1nH, and the capacitance value of the filter capacitor 112b is 2.2pF. As can be seen from curve ②, the maximum value of the coupling current is 181mA.

[0115] Curve ③( Fig. 20 The blue curve in (a) is a coupling current curve on the signal line 410 on the flexible circuit board 40 connected to the functional device 20 when the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, and the inductance value of the first inductor 112a of the band-stop circuit 1121 is 8.2nH, and the capacitance value of the filter capacitor 112b is 0.3pF. It can be seen from curve ③ that the maximum value of the coupling current is 69mA.

[0116] Curve ④( Fig. 20The brown curve in (a) is a coupling current curve on the signal line 410 on the flexible circuit board 40 connected to the functional device 20 when the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, and the inductance value of the first inductor 112a of the band-stop circuit 1121 is 3.9nH, and the capacitance value of the filter capacitor 112b is 0.5pF. As can be seen from curve ④, the maximum value of the coupling current is only 9mA.

[0117] It can be seen that the first antenna 110 of the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application includes a band-stop circuit 1121 of the first frequency band, and the three-quarter wavelength mode from the first free end 1111 to the first ground end 1112 of the first radiator 111 supports the first frequency band. Therefore, the coupling current on the signal line 410 on the flexible circuit board 40 connected to the functional device 20 is significantly reduced compared with the coupling current of the prior art. Therefore, the operation of the first antenna 110 in the first frequency band has little effect on the performance of the functional device 20, thereby ensuring the performance of the functional device 20.

[0118] Please read further Figure 1 , the electronic device 1 provided in one embodiment of the present application further includes a display screen 50 and a back cover 60. The display screen 50 is arranged on one side of the middle frame 30. The display screen 50 is a component for realizing the display function in the electronic device 1. The back cover 60 is arranged on the other side of the middle frame 30. In other words, the back cover 60 and the display screen 50 are respectively arranged on two opposite sides of the middle frame 30. It can be understood that the description of other components in the electronic device 1 should not be understood as a limitation on the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application.

[0119] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device comprises: Functional devices; and An antenna assembly, the antenna assembly comprising a first antenna, the first antenna comprising: A first radiator, the first radiator having a first free end, a first feeding point, a first grounding point and a first grounding end which are arranged in sequence, the first grounding point being arranged closer to the functional device than the first grounding end, and the first grounding end being grounded; a first feed source, the first feed source being electrically connected to the first feeding point and used for exciting a first resonant mode of the first radiator to support a first frequency band, the first resonant mode being a three-quarter wavelength mode from the first free end to the first ground end; and The matching circuit comprises a band-stop circuit of a first frequency band, one end of the band-stop circuit is electrically connected to the first ground point, and the other end is grounded.

2. The electronic device according to claim 1, wherein: The band-stop circuit comprises: a first inductor, one end of which is electrically connected to the first ground point, and the other end of which is grounded; and A filter capacitor is connected in parallel with the first inductor.

3. The electronic device according to claim 2, characterized in that: The first frequency band includes the N78 frequency band; The inductance value L1 of the first inductor satisfies: 1nH≤L1≤8.2nH; The capacitance value C0 of the filter capacitor satisfies: 0.3pF≤C0≤2.2pF.

4. The electronic device according to claim 2, characterized in that: The matching circuit further includes: A second inductor, wherein the other end of the first inductor is electrically connected to the ground.

5. The electronic device according to claim 1, wherein: The first feed source is also used to excite a second resonant mode of the first radiation to support a second frequency band, wherein the second resonant mode is a quarter-wavelength mode from the first feeding point to the first free end, and the frequency of the second frequency band is greater than the frequency of the first frequency band.

6. The electronic device according to claim 5, characterized in that: The first frequency band includes the N78 frequency band, and the second frequency band includes the WiFi 5G frequency band; or, The first frequency band includes a WiFi 2.4G frequency band, and the second frequency band includes a WiFi 5G frequency band.

7. The electronic device according to claim 1, characterized in that: The electronic device further comprises: A flexible circuit board, the flexible circuit board comprising a signal line, the signal line is electrically connected to the functional device, and the first ground point is arranged adjacent to the signal line compared to the first ground end; When the first antenna supports the first frequency band, the coupling current I0 of the signal line satisfies: I0≤185mA.

8. The electronic device according to any one of claims 1 to 7, characterized in that: The antenna assembly further includes a second antenna, the second antenna comprising: A parasitic radiator, the parasitic radiator comprising the first ground terminal and a coupling terminal arranged in sequence; A second radiator, the second radiator comprising a second free end, a second feeding point and a second ground end which are arranged in sequence, the second free end and the coupling end are arranged with a coupling gap therebetween, and the second radiator is coupled to the parasitic radiator through the coupling gap; and A second feed source, wherein the second feed point is electrically connected to the second feed point to excite a third resonant mode to support a third frequency band, wherein the third resonant mode includes a quarter-wavelength mode from the second feed point to the coupling slot and a quarter-wavelength mode of the parasitic radiator.

9. The electronic device according to claim 8, characterized in that: The second feed source further excites a fourth resonance mode of the second radiator to support a fourth frequency band, wherein the fourth resonance mode includes a quarter-wavelength mode from the second ground end to the coupling slot.

10. The electronic device according to claim 9, characterized in that: The third frequency band includes a high frequency band, and the fourth frequency band includes a medium frequency band.

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