Antenna assembly and electronic device

Abstract

The application provides an antenna assembly, which comprises a first antenna unit, a second antenna unit and a decoupling structure. The first antenna unit comprises a first radiator, a second radiator and a first feed source, the first feed source is used for providing a feed signal for the first radiator and the second radiator, the first radiator supports at least the transmission and reception of radio frequency signals of a first frequency band, and the second radiator supports the transmission and reception of radio frequency signals of a second frequency band. The second antenna unit comprises a third radiator and a second feed source, the second feed source is used for providing a feed signal for the third radiator, and the third radiator supports the transmission and reception of radio frequency signals of a third frequency band, wherein the third frequency band at least partially overlaps with the second frequency band. The decoupling structure is connected between the second radiator and the third antenna radiator, and is used for improving the isolation between the second antenna radiator and the third antenna radiator. An electronic device is also provided. The application can effectively improve the antenna performance.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, and more specifically to an antenna assembly and an electronic device having said antenna assembly. Background Technology

[0002] With technological advancements, mobile phones and other electronic devices with communication capabilities are becoming increasingly widespread and powerful. These devices typically include antenna components to enable their communication functions. As communication technology progresses, the number of antenna radiators required is also increasing; for example, 5G communication technology already utilizes a considerable number of antennas. Therefore, improving the communication quality of electronic devices without increasing their size has become a crucial technical challenge. Summary of the Invention

[0003] This application provides an antenna assembly and an electronic device having the antenna assembly to solve the above-mentioned problems.

[0004] On one hand, an antenna assembly is provided, comprising a first antenna element, a second antenna element, and a decoupling structure. The first antenna element includes a first radiator, a second radiator, a first feed source, and a first matching circuit. The first radiator includes a first feed point and a first ground point, and the second radiator includes a second feed point and a second ground point. The first matching circuit is connected between the first feed source and the feed points of the first and second radiators. The first feed source provides feed signals to the first and second radiators through the first matching circuit. The first radiator supports the transmission and reception of radio frequency signals in at least a first frequency band, and the second radiator supports the transmission and reception of radio frequency signals in a second frequency band. The second antenna element includes a third radiator, a second feed source, and a second matching circuit. The third radiator includes a third feed point and a third ground point. The second matching circuit is connected between the second feed source and the feed point of the third radiator. The second feed source provides a feed signal to the third radiator through the second matching circuit. The third radiator supports the transmission and reception of radio frequency signals in a third frequency band, wherein the third frequency band at least partially overlaps with the second frequency band. The first ground point, the second ground point, and the third ground point are grounded. The decoupling structure is connected between the second radiator and the third antenna radiator to improve the isolation between them.

[0005] On the other hand, an electronic device is also provided, the electronic device including an antenna assembly. The antenna assembly includes a first antenna element, a second antenna element, and a decoupling structure. The first antenna element includes a first radiator, a second radiator, a first feed source, and a first matching circuit. The first radiator includes a first feed point and a first ground point, and the second radiator includes a second feed point and a second ground point. The first matching circuit is connected between the first feed source and the feed points of the first and second radiators. The first feed source provides feed signals to the first and second radiators through the first matching circuit. The first radiator supports the transmission and reception of radio frequency signals in at least a first frequency band, and the second radiator supports the transmission and reception of radio frequency signals in a second frequency band. The second antenna element includes a third radiator, a second feed source, and a second matching circuit. The third radiator includes a third feed point and a third ground point. The second matching circuit is connected between the second feed source and the feed point of the third radiator. The second feed source provides a feed signal to the third radiator through the second matching circuit. The third radiator supports the transmission and reception of radio frequency signals in a third frequency band, wherein the third frequency band at least partially overlaps with the second frequency band. The first ground point, the second ground point, and the third ground point are grounded. The decoupling structure is connected between the second radiator and the third antenna radiator to improve the isolation between them.

[0006] This application designs an antenna assembly including a first antenna element supporting multiple frequency bands and a second antenna element supporting other frequency bands, achieving coverage of multiple frequency bands. The first antenna element is a first radiator, and the second radiator shares a first matching circuit and a first feed source, which can save internal space and the number of components, reducing costs. At the same time, the decoupling structure improves the isolation between two radiators with overlapping frequency bands, avoiding interference between radiators, effectively improving antenna performance and communication quality. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other modifications can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the antenna assembly in one embodiment of this application.

[0009] Figure 2This is a schematic diagram illustrating the principle of improving isolation through decoupling structure in one embodiment of this application.

[0010] Figure 3 This diagram illustrates the return loss curve of the isolation between the first antenna element and the second antenna element before the decoupling structure is added.

[0011] Figure 4 The diagram illustrates the return loss curve of the isolation between the first antenna element and the second antenna element after adding the decoupling structure in one embodiment of this application.

[0012] Figure 5 This is a schematic diagram of the antenna assembly in another embodiment of this application.

[0013] Figure 6 This is a schematic diagram of the structure of an antenna assembly according to yet another embodiment of this application.

[0014] Figure 7 This is a schematic diagram of the antenna assembly in another embodiment of this application.

[0015] Figure 8 for Figure 7 The diagram shows the current distribution of the first resonant mode under the structure of the antenna assembly shown.

[0016] Figure 9 for Figure 7 The diagram shows the current distribution in the second resonant mode of the antenna assembly structure.

[0017] Figure 10 for Figure 7 The diagram shows the current distribution in the third resonant mode of the antenna assembly structure.

[0018] Figure 11 This is a schematic diagram of the antenna assembly in a further embodiment of this application.

[0019] Figure 12 This is a partial circuit diagram of an antenna assembly in one embodiment of this application.

[0020] Figure 13 This is a structural block diagram of an electronic device according to an embodiment of this application.

[0021] Figure 14 This is a partial structural diagram of an electronic device according to an embodiment of this application.

[0022] Figure 15 This is a partial structural diagram of an electronic device according to another embodiment of this application.

[0023] Figure 16This is a schematic plan view of the internal structure of an electronic device provided in one embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "thickness", "width", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not imply or indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0026] Please see Figure 1 This is a schematic diagram of the antenna assembly 1 in one embodiment of this application. Figure 1As shown, the antenna assembly 1 includes a first antenna element 10, a second antenna element 20, and a decoupling structure 30. The first antenna element 10 includes a first radiator 11, a second radiator 12, a first feed source S1, and a first matching circuit 13. The first radiator 11 includes a first feed point K1 and a first ground point G1, and the second radiator 12 includes a second feed point K2 and a second ground point G2. The first matching circuit 13 is connected between the first feed source S1 and the first feed point K1 of the first radiator 11 and the second feed point K2 of the second radiator 12. The first feed source S1 provides feed signals to the first radiator 11 and the second radiator 12 through the first matching circuit 13. The first radiator 11 supports the transmission and reception of radio frequency signals in at least a first frequency band, and the second radiator 12 supports the transmission and reception of radio frequency signals in a second frequency band. The second antenna unit 20 includes a third radiator 21, a second feed source S2, and a second matching circuit 22. The third radiator 21 includes a third feed point K3 and a third ground point G3. The second matching circuit 22 is connected between the second feed source S2 and the third feed point K3 of the third radiator 21. The second feed source S2 provides a feed signal to the third radiator K3 through the second matching circuit 22. The third radiator 21 supports the transmission and reception of radio frequency signals in a third frequency band, wherein the third frequency band at least partially overlaps with the second frequency band. The first ground point G1, the second ground point G2, and the third ground point G3 are grounded. The decoupling structure 30 is connected between the second radiator 12 and the third antenna radiator 21 to improve the isolation between the second radiator 12 and the third antenna radiator 21.

[0027] Therefore, the antenna assembly 1 in this application includes a first antenna element 10 supporting multiple frequency bands and a second antenna element 20 supporting other frequency bands, achieving coverage of multiple frequency bands. The first antenna element 10 consists of a first radiator 11 and a second radiator 12, which share a first matching circuit 13 and a first feed source S1, saving internal space and reducing the number of components, thus reducing costs. At the same time, the decoupling structure 30 improves the isolation between two radiators with overlapping frequency bands, avoiding interference between radiators, effectively improving antenna performance and communication quality.

[0028] The second radiator 12 and the third radiator 21 are coupled to generate a first current. The decoupling structure 30 generates a second current, which has the same amplitude as the first current but a different phase. For example, the phase difference between the second current and the first current is 90°-270°. The coupling between the second radiator 12 and the third radiator 21 is caused by their proximity / overlapping frequency bands or close distance.

[0029] like Figure 1 As shown, one end 301 of the decoupling structure 30 is connected to the first preset position of the second radiator 12, and the other end 302 of the decoupling structure 30 is connected to the second preset position of the third antenna radiator 21; the first preset position is the second feed point K2 or any position between the second feed point K2 and the second ground point G2, and the second preset position is the third feed point K3 or any position between the third feed point K3 and the third ground point G3.

[0030] That is, in some embodiments, the two ends of the decoupling structure 30 can be connected to the second feed point K2 of the second radiator 12 and the third feed point K3 of the third radiator 13, respectively; or, one end of the decoupling structure 30 is connected to the second feed point K2 of the second radiator 12, and the other end is connected to a certain position between the third feed point K3 and the third ground point G3; or, one end of the decoupling structure 30 is connected to a certain position between the second feed point K2 and the second ground point G2, and the other end is connected to the third feed point K3; or, one end of the decoupling structure 30 is connected to a certain position between the second feed point K2 and the second ground point G2, and the other end is also connected to a certain position between the third feed point K3 and the third ground point G3.

[0031] In one embodiment, the two ends of the decoupling structure 30 are respectively connected to the current-strong points of the feed path of the second radiator 12 and the current-strong points of the feed path of the third antenna radiator 21. Generally, since the feed point is the current-strong point on the feed path of the radiator, in one embodiment, the two ends of the decoupling structure 30 are respectively connected to the second feed point K2 of the second radiator 12 and the third feed point K3 of the third antenna radiator 21. That is, in one embodiment, the first preset position is the second feed point K2, and the second preset position is the third feed point K3.

[0032] Please refer to the following: Figure 2 This is a schematic diagram illustrating the principle of improving isolation through decoupling structure 30 in one embodiment of this application.

[0033] As previously described, the second radiator 12 and the third radiator 21 are coupled to generate a first current. The decoupling structure 30 is used to generate a second current, which has the same amplitude as the first current but a different phase. For example, the phase difference between the second current and the first current is 90°-270°. The following further explains the electrical length parameters that the decoupling structure 30 of this application must meet during design.

[0034] like Figure 2 As shown, let the electrical length of the interference current (i.e., the aforementioned first current) generated by the mutual coupling between the second radiator 12 and the third radiator 21 be the target electrical length L1. Then, the absolute value of the difference ΔL between the electrical length L2 of the decoupling structure 30 and the target electrical length L1 is m + 2nπ, where m is a value between π / 2 and 3π / 2, and n is 0 or a positive integer. That is, the relationship between the electrical length L2 of the decoupling structure 30 and the target electrical length L1 satisfies the formula: |L2 - L1| = |ΔL| = m + 2nπ.

[0035] Wherein, the electrical length refers to the current path length. The electrical length L2 of the decoupling structure 30 refers to the length of the current path from the second radiator 12 to the third radiator 21 through the decoupling structure 30, or the length of the current path from the third radiator 21 to the second radiator 12 through the decoupling structure 30. The electrical length of the interference current / first current generated by the frequency band overlap between the second radiator 12 and the third radiator 21 refers to the length of the current path from the second radiator 12 to the third radiator 21, or from the third radiator 21 to the second radiator 12, through other original paths when the decoupling structure 30 is not provided.

[0036] The other existing paths include the spatial coupling path between the second radiator 12 and the third radiator 21, or further, the path systematically leading to the feed point of the second radiator 12 or the third radiator 21. The interference current generated by the overlapping frequency bands of the second radiator 12 and the third radiator 21 is the sum of the currents from the other existing paths.

[0037] Wherein, π is the electrical length value used to indicate half a wavelength. Therefore, since the absolute value of the difference ΔL between the electrical length L2 of the decoupling structure 30 and the target electrical length L1 is the sum of the electrical lengths of the n wavelengths (2nπ) and any value between π / 2 and 3*π / 2, the phase of the current transmitted through the decoupling structure 3 to the second radiator 12 or the third radiator 21 will differ from the phase of the interference current transmitted from the second radiator 12 to the third radiator 21 or from the third radiator 21 to the second radiator 12 by π / 2 to 3*π / 2 (90°-270°). This effectively weakens the interference current, thereby effectively reducing or even eliminating it. For example, when the absolute value of the difference ΔL between the electrical length L2 of the decoupling structure 30 and the target electrical length L1 is 2nπ+π, the phase difference of the interference current transmitted from the second radiator 12 to the third radiator 21 or from the third radiator 21 to the second radiator 12 is π (180°), thereby almost completely canceling out the interference current.

[0038] The electrical length L2 of the decoupling structure 30 can be longer than or shorter than the target electrical length L1 of the interference current, as long as the absolute value of the difference ΔL between the electrical length L2 and the target electrical length L1 of the decoupling structure 30 is m+2nπ.

[0039] In a preferred embodiment, the two ends 301 and 302 of the decoupling structure 30 can be connected to the second feed point K2 of the second radiator 12 and the third feed point K3 of the third radiator 13, respectively. As mentioned above, the other original paths include paths between the second radiator 12 and the third radiator 21 through spatial coupling to each other's feed points, or further, paths from the system to the feed points of the second radiator 12 or the third radiator 21. Since the two ends of the decoupling structure 30 are connected to the second feed point K2 of the second radiator 12 and the third feed point K3 of the third radiator 13, when the current in the decoupling structure 30 merges with the interference current at the second feed point K2 or the third feed point K3, the interference current can be weakened more accurately.

[0040] Specifically, at least one of the target size parameters of the decoupling structure 3, such as its length and width, can be obtained in advance through simulation experiments, such that the absolute value of the difference ΔL between the electrical length L2 and the target electrical length L1 of the decoupling structure 3 is m+2nπ. Thus, a decoupling structure 3 with the target size parameters can be added to the antenna assembly 1.

[0041] Please refer to the following: Figure 3 and Figure 4 , Figure 3 The diagram illustrates the return loss curve of the isolation between the first antenna element 10 and the second antenna element 20 before the decoupling structure 30 is added. Figure 4 This diagram illustrates the return loss curve representing the isolation between the first antenna element 10 and the second antenna element 20 after adding the decoupling structure 30. Specifically, the isolation between the first antenna element 10 and the second antenna element 20 mainly refers to the isolation between the second radiator 12 in the first antenna element 10 and the third radiator 21 in the second antenna element 20. The return loss curve, abbreviated as RL, represents the return loss, which is one of the S-parameters. In this embodiment, the horizontal axis represents frequency in GHz, and the vertical axis represents return loss in dB.

[0042] like Figure 3 and Figure 4 As shown, the return loss curve corresponding to the first antenna element 10 is S11, the return loss curve corresponding to the second antenna element 20 is S22, and the isolation between the first antenna element 10 and the second antenna element 20 is S21. Figure 3 As can be seen, before the decoupling structure 30 is added, the isolation between the first antenna element 10 and the second antenna element 20 is approximately -8.5098dB.

[0043] And from Figure 4 As can be seen, after adding the decoupling structure 30 of this application, the isolation between the first antenna element 10 and the second antenna element 20 becomes approximately -13.347dB, and the isolation is improved by 4.8372dB, thereby effectively improving the isolation.

[0044] In some embodiments, the second radiator 12 and the third radiator 21 are also reused as proximity sensing elements to generate a sensing signal when a human body approaches.

[0045] In this design, both the second radiator 12 and the third radiator 21 are metallic conductive components, and they are integrated into a single metallic conductive component via the decoupling structure 30. Since the human body is also a conductor, when a human body approaches the second radiator 12 or the third radiator 21, a coupling capacitance is generated between the human body and the second radiator 12 and / or the third radiator 21, causing a change in the charge of the second radiator 12 and / or the third radiator 21, thus generating the induced signal. The induced signal can be a current signal or a voltage signal. In some embodiments, the induced signal can also be a charge change value.

[0046] Please see Figure 5 This is a schematic diagram of the antenna assembly 1 in another embodiment of this application. When the second radiator 12 and the third radiator 21 are also multiplexed as proximity sensing elements, such as Figure 5 As shown, an isolation capacitor C1 is connected between the second grounding point G2 and the ground, and an isolation capacitor C2 is connected between the third grounding point G3 and the ground. That is, isolation capacitors are connected between the second grounding point G2 and the ground, and between the third grounding point G3 and the ground.

[0047] The grounding points G1, G2, and G3 mentioned above refer to the overall ground of the electronic device to which the antenna assembly 1 is applied / installed. Due to the DC-blocking and AC-passing characteristics of capacitors, the isolation capacitors C1 and C2 are used to make the sensing element 11 appear to float, isolating / floating relative to the overall ground of the electronic device, thus meeting the requirements for human proximity sensing. Since the antenna radio frequency signals are high-frequency AC signals, they will not affect the antenna performance of the second radiator 12 and the third radiator 21.

[0048] In some embodiments, an isolation capacitor may be connected between the grounding point G1 of the first radiator 11 and the ground, and the first radiator 11 may also be reused as a proximity sensing element, thereby effectively increasing the sensing area of ​​proximity sensing.

[0049] like Figure 5 As shown, an isolation capacitor C3 is connected between the first matching circuit 13 and the second radiator 12, and an isolation capacitor C4 is also connected between the second matching circuit 22 and the third radiator 21. That is, isolation capacitors are also connected between the first matching circuit 13 and the second radiator 12, and between the second matching circuit 22 and the third radiator 21.

[0050] Therefore, by connecting isolation capacitors between the first matching circuit 13 and the second radiator 12, and between the second matching circuit 22 and the third radiator 21, it is possible to prevent the DC induced current or induced voltage generated when a human body approaches from being transmitted to the first matching circuit 13 and the second matching circuit 22, thus avoiding any impact on the antenna operation.

[0051] Please see Figure 6 This is a schematic diagram of the structure of antenna assembly 1 according to yet another embodiment of this application. Figure 6As shown, the antenna assembly 1 further includes at least one metal sheet 40, which is electrically connected to the decoupling structure 30. The at least one metal sheet 40 also serves as a proximity sensing element and, through its connection with the decoupling structure 40, the second radiator 12, and the third radiator 21, forms an integrated proximity sensing element. The decoupling structure 40 can be an electrical conductor, thereby electrically connecting the at least one metal sheet 40 to the second radiator 12 and the third radiator 21.

[0052] Therefore, by increasing the metal sheet 40, the overall area of ​​the proximity sensing element can be effectively increased, thereby improving detection accuracy and sensitivity.

[0053] Among them, such as Figure 6 As shown, the at least one metal sheet 40 is located between the second radiator 12 and the third radiator 21. The feed signals generated by the first feed source S1 and the second feed source S2 are fed into the ground through the second radiator 12 and the third radiator 21, respectively. The feed signals flowing into the decoupling structure 30 are very weak. Therefore, the radio frequency signals generated by the at least one metal sheet 40 are very weak, that is, they will not have any impact on the antenna performance of the original antenna assembly 1.

[0054] In some embodiments, such as Figure 6 As shown, the connection point N1 between the metal sheet 40 and the decoupling structure 30 is located at the end of the metal sheet 40 closer to the first radiator 11, so that the radiating end of the metal sheet 40 is far away from the first radiator 11. Therefore, even if the feed signal flowing into the decoupling structure 30 is very weak, resulting in a weak radio frequency signal generated by the at least one metal sheet 40, the interference of the metal sheet 40 to the first radiator 11 can be further reduced by the connection point between the metal sheet 40 and the decoupling structure 30 being located at the end of the metal sheet 40 closer to the first radiator 11, thus keeping the radiating end of the metal sheet 40 far away from the first radiator 11. The radiating end of the metal sheet 40 is the end opposite to the end connected to the decoupling structure 30.

[0055] Since the at least one metal sheet 40 is located between the second radiator 12 and the third radiator 21, and is arranged approximately along the extension direction of the first radiator 11, even if the at least one metal sheet 40 generates a radio frequency signal, it will be far away from the second radiator 12 and the third radiator 21, and therefore will not interfere with the second radiator 12 and the third radiator 21.

[0056] like Figure 6As shown, the at least one metal piece 40 is also grounded through an isolation capacitor (not labeled in the figure), so that the at least one metal piece 40 presents a floating effect and is isolated / suspended relative to the ground of the electronic device, further meeting the requirements of human proximity sensing.

[0057] like Figure 1 , Figure 5 , Figure 6 As shown in the figures, in some embodiments, the decoupling structure 30 is a bent line and has a rectangular wave shape; that is, the decoupling structure 30 can specifically be a bent electrical wire. Figure 6 As shown, the decoupling structure 30 extends at least in a bent manner between the second radiator 12 and the at least one metal sheet 40, and between the at least one metal sheet 40 and the third radiator 21.

[0058] Therefore, by bending and extending the decoupling structures 30 at least between the second radiator 12 and the at least one metal sheet 40 and between the at least one metal sheet 40 and the third radiator 21, the at least one metal sheet 40 can be further isolated from the second radiator 12 and the third radiator 21 respectively, thereby avoiding interference from the at least one metal sheet 40 to the second radiator 12 and the third radiator 21.

[0059] like Figure 6 As shown, the decoupling structure 30 is also connected to the second radiator 12, the third radiator 21, and the portion of the at least one metal sheet 40 near the first radiator 11.

[0060] Specifically, the decoupling structure 30 extends a first predetermined length from the end connected to the second radiator 12 in a first direction away from the first radiator 11, then bends and extends a second predetermined length along a second direction, which is perpendicular to the first direction and close to the third radiator 21. It then extends a third predetermined length in a third direction close to the first radiator 11, where the third direction is parallel to the first direction but opposite in direction. Next, the decoupling structure 30 extends a fourth predetermined length in the second direction, where this fourth predetermined length extension is electrically connected to the at least one metal piece 40 via an electrical connector. This electrical connector can be a wire, a metal spring, etc. Then, the decoupling structure 30 extends a fifth predetermined length in the first direction, then bends and extends a sixth predetermined length along the second direction, and then extends a seventh predetermined length in a third direction close to the first radiator 11 before connecting to the third radiator 21.

[0061] The first preset length, the third preset length, the fifth preset length, and the seventh preset length may be the same or different, and the second preset length, the fourth preset length, and the sixth preset length may be the same or different.

[0062] When the number of at least one metal sheet 40 is greater than or equal to 2, the at least one metal sheet 40 can be spaced apart from each other and are arranged sequentially between the second radiator 12 and the third radiator 21 along the direction from the second radiator 12 to the third radiator 21, and the end of each metal sheet 40 near the first radiator 11 is electrically connected to the neutralizing conductive wire 30.

[0063] The metal sheet 40 can be made of metal materials such as copper, iron, or copper-iron alloy. The metal sheet 40 can be fixed to FPC, PCB board, etc.

[0064] In some embodiments, the first frequency band includes the MB (Middle band) and HB (High band) frequency bands. The second and third frequency bands may include UHB (Ultra high band) frequency bands, such as the 5G N79 band.

[0065] Please see Figure 7 This is a schematic diagram of the antenna assembly 1 in another embodiment of this application. Figure 7 As shown, the first antenna unit 10 further includes a fourth radiator 14. A gap F1 exists between the fourth radiator 14 and the first radiator 11. The fourth radiator 14 is coupled to the first radiator 11 through the gap F1. The fourth radiator 14 has a fourth grounding point G4. The first grounding point G1 is located at the end D1 of the first radiator 11 away from the gap F1. The fourth grounding point G4 is also located at the end D2 of the fourth radiator 14 away from the gap F1. The first radiator 11 and the fourth radiator 14 are coupled to form at least two resonant modes. The at least two resonant modes cooperate with each other to support the transmission and reception of radio frequency signals in the MB band and HB band at the same time, or cooperate with each other to support the transmission and reception of radio frequency signals in the MB band of 4G Long Term Evolution (LTE) and the MB band of 5G New Radio (NR) at the same time, or cooperate with each other to support the transmission and reception of radio frequency signals in the HB band of LTE and the HB band of NR at the same time.

[0066] Therefore, by further configuring the fourth radiator 14, and wherein the radiator 14 and the first radiator 11 are spaced apart to form a gap F1 and coupled to each other, the antenna can cooperate with the first radiator 11 to transmit and receive radio frequency signals, thereby improving antenna performance. Specifically, the feed signal generated by the first feed source S1 is loaded onto the first radiator 11 from the first feed point K1 and coupled to the fourth radiator 14 via the gap F1. Therefore, the frequency band can be widened.

[0067] in, Figure 7 The structural diagram shown is in Figure 5 The fourth radiator 14 is added to the embodiment shown. Obviously, the fourth radiator 14 can be added in any of the foregoing embodiments.

[0068] Among them, such as Figure 7 As shown, let the end of the first radiator 11 near the gap F1 be the first free end D3, and let the first grounding point G1 be the first grounding end D1 located at the end D1 of the first radiator 11. Let the end of the fourth radiator 14 near the gap F1 be the second free end D4, and let the end D2 of the fourth radiator 11 where the fourth grounding point G4 is located be the second grounding end D2.

[0069] The first radiator 11 can be a straight strip, a bent shape, or another shape. This application does not limit the shape of the first radiator 11. When the first radiator 11 is a straight strip, the first grounding end D1 and the first free end D3 are two opposite ends of the first radiator 11. When the first radiator 11 is a bent shape, for example, when the first radiator 11 includes two bent and connected radiating parts, the first grounding end D1 and the first free end D3 are the ends of the two radiating parts, and the first grounding end D1 is the end of one radiating part that is away from the other radiating part, and the first free end D3 is the end of the other radiating part that is away from the first radiating part.

[0070] Accordingly, the fourth radiator 14 can be a straight strip-shaped radiator, a bent radiator, or a radiator of other shapes. This application does not limit the shape of the fourth radiator 14. When the fourth radiator 14 is a straight strip-shaped radiator, the second grounding end D2 and the second free end D4 are two opposite ends of the fourth radiator 14. When the fourth radiator 14 is a bent radiator, for example, when the fourth radiator 14 includes two bent and connected radiating parts, the second grounding end D2 and the second free end D4 are the ends of the two radiating parts, and the second grounding end D2 is the end of one radiating part that faces away from the other radiating part, and the second free end D4 is the end of the other radiating part that faces away from the first radiating part.

[0071] In some embodiments, the first radiator 11 and the fourth radiator 14 may be metal-framed antennas. The second radiator 12 and the third radiator 21 may be flexible printed circuit (FPC) antenna radiators, laser direct forming (LDS) antenna radiators, or printed direct forming (PDS) antenna radiators. Furthermore, the second radiator 12 and the third radiator 21 are disposed close to the first radiator 11.

[0072] In other embodiments, the first radiator 11, the second radiator 12, the third radiator 21, and the fourth radiator 14 may be FPC antenna radiators, LDS antenna radiators, or PDS antenna radiators, and their types may be the same or different. That is, the first radiator 11, the second radiator 12, the third radiator 21, and the fourth radiator 14 may be any one of FPC antenna radiators, LDS antenna radiators, and PDS antenna radiators, and their types may be the same or different.

[0073] In some embodiments, an isolation capacitor is also connected between the fourth grounding point G4 of the fourth radiator 14 and the ground. The fourth radiator 14 can also be reused as a proximity sensing element, thereby further increasing the sensing area of ​​human proximity sensing.

[0074] The first power supply point K1 is located between the first grounding terminal D1 and the first free terminal D3, and is closer to the first free terminal D3.

[0075] Among them, such as Figure 7As shown, the first radiator 11 extends from the first grounding point D1 to the first free end D3, passing through the third radiator 21, at least one metal plate 40, and the second radiator 12. The gap F1 between the first radiator 11 and the fourth radiator 14 is located on the side of the second radiator 12 away from the at least one metal plate 40, thereby further avoiding interference with the at least one metal plate 40.

[0076] Please refer to the following: Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of the current distribution in the first resonant mode; Figure 9 This is a schematic diagram of the current distribution in the second resonant mode. Figure 8 In the first resonant mode, the current distribution is from the second ground terminal D2 to the first ground terminal D1. Figure 9 In the second resonant mode, the current distribution is such that it flows from the first feed source S1 to the second grounding terminal D2.

[0077] In other words, the current distribution in the first resonant mode flows from the second ground terminal D2 to the second free terminal D4, and from the first free terminal D3 to the first ground terminal D1. More specifically, the current distribution in the first resonant mode is as follows: it flows from the second ground terminal D2 to the second free terminal D4, then through the coupling between the first free terminal D3 and the second free terminal D4, it flows from the second free terminal D4 to the first free terminal D3, and finally from the first free terminal D3 to the first ground terminal D111.

[0078] In other words, the current distribution in the second resonant mode flows from the first feed source S1 through the first feed point K1 to the first free end D3, and from the second free end 152 to the second ground end 151. Specifically, the current distribution in the second resonant mode is as follows: from the signal source 140 to the first feed point K1, from the first feed point K1 to the first free end 112, then through the coupling between the first free end 112 and the second free end 152, from the first free end 112 to the second free end 152, and then from the second free end 152 to the second ground end 151.

[0079] In some embodiments, the first antenna element 10 further has a third resonant mode. The third resonant mode is used to support the transmission and reception of radio frequency signals in the Ultra High Band (UHB) band. The UHB band ranges from 3.0 GHz to 6.0 GHz, and may specifically be the 5 GHz N79 band.

[0080] Please refer to the following: Figure 10 , Figure 10 This is a schematic diagram of the current distribution in the third resonant mode. The current in the third resonant mode includes a first sub-current Ia and a second sub-current Ib, wherein the first sub-current Ia is distributed from the first ground terminal D1 to the first free terminal D3, and the second sub-current Ib is distributed from the second ground terminal D2 to the second free terminal D4.

[0081] Please see Figure 11 This is a schematic diagram of the antenna assembly 1 in a further embodiment of this application. In this further embodiment, the antenna assembly 1 further includes an adjustment circuit 50. Figure 11 Is Figure 1 The embodiment shown is based on the addition of the adjustment circuit 50; however, the adjustment circuit 50 can be applied to any of the foregoing embodiments. The adjustment circuit 50 is electrically connected to the first matching circuit 13, and includes a switching unit 51 and multiple sub-adjustment circuits 52. The switching unit 51 is used to select at least one sub-adjustment circuit 52 to be electrically connected to the first matching circuit 13. The adjustment circuit 50 is used to cooperate with the first matching circuit 13 to adjust at least the capacitance, inductance, and other parameters of the first radiator 11, thereby achieving LC tuning.

[0082] Please refer to the following: Figure 12 This is a partial circuit diagram of antenna assembly 1 in one embodiment of this application. Figure 12 As shown, the plurality of sub-regulation circuits 52 include a first sub-regulation circuit 521, a second sub-regulation circuit 522, a third sub-regulation circuit 523, and a fourth sub-regulation circuit 524. The switching unit 51 includes a common terminal A, a first sub-switching unit 511, a second sub-switching unit 512, a third sub-switching unit 513, and a fourth sub-switching unit 514. The common terminal A is electrically connected to the first matching circuit 13. The first sub-switching unit 511 is electrically connected from the first sub-regulation circuit 521 to the first matching circuit 13. The second sub-switching unit 512 is electrically connected from the second sub-regulation circuit 522 to ground. The third sub-switching unit 513 is electrically connected from the third sub-regulation circuit 523 to ground. The fourth sub-switching unit 514 is electrically connected from the fourth sub-regulation circuit 524 to ground.

[0083] When the first sub-switch unit 511 is turned on, the first sub-adjustment circuit 521 is electrically connected to the first matching circuit 13; when the first sub-switch unit 511 is turned off, the first sub-adjustment circuit 521 is disconnected from the first matching circuit 13. When the second sub-switch unit 512 is turned on, the second sub-adjustment circuit 522 is electrically connected to the first matching circuit 13; when the second sub-switch unit 512 is turned off, the second sub-adjustment circuit 522 is disconnected from the first matching circuit 13. When the third sub-switch unit 513 is turned on, the third sub-adjustment circuit 523 is electrically connected to the first matching circuit 13; when the third sub-switch unit 513 is turned off, the third sub-adjustment circuit 523 is disconnected from the first matching circuit 13. When the fourth sub-switch unit 514 is turned on, the fourth sub-adjustment circuit 524 is electrically connected to the first matching circuit 13; when the fourth sub-switch unit 514 is turned off, the fourth sub-adjustment circuit 524 is disconnected from the first matching circuit 13.

[0084] In one embodiment, the first sub-adjustment circuit 521 includes an adjustment capacitor C11. The second sub-adjustment circuit 522 includes a first inductor L11. The third sub-adjustment circuit 523 includes a second inductor L12. The fourth sub-adjustment circuit 524 includes a third inductor L13.

[0085] In one embodiment, the inductance values ​​of the first inductor L11, the second inductor L12, and the third inductor L13 are all different. When the inductance values ​​of the first inductor L11, the second inductor L12, and the third inductor L13 are all different, the inductance value of any one of the following inductors connected to the first matching circuit 13 is different: the first inductor L11, the second inductor L12, the third inductor L13, a combination of the first inductor L11 and the second inductor L12, a combination of the first inductor L11 and the third inductor L13, a combination of the second inductor L12 and the third inductor L13, or a combination of the first inductor L11, the second inductor L12, and the third inductor L13. Therefore, different combinations of inductance values ​​can be achieved, thereby enabling different LC resonances.

[0086] Please continue reading. Figure 12The first matching circuit 13 includes a first sub-matching circuit 131 and a second sub-matching circuit 132. One end of the first sub-matching circuit 131 is electrically connected to the signal source 140, and the other end of the first sub-matching circuit 131 is electrically connected to the first sub-adjustment circuit 521. The first sub-matching circuit 131 and the first sub-adjustment circuit 521 are used to adjust the capacitance value of the antenna 10. One end of the second sub-matching circuit 132 is electrically connected to the first sub-matching circuit 131, and the other end of the second sub-matching circuit 132 is electrically connected to the first feed point K1. The second sub-matching circuit 132 cooperates with at least one of the second sub-adjustment circuit 522, the third sub-adjustment circuit 523, and the fourth sub-adjustment circuit 524 to adjust the inductance value of the antenna 10. In other words, the second sub-matching circuit 132 cooperates with at least one sub-adjustment circuit to adjust the inductance value of the antenna 10, wherein the sub-adjustment circuit includes the second sub-adjustment circuit 522, the third sub-adjustment circuit 523, and the fourth sub-adjustment circuit 524.

[0087] The first sub-matching circuit 131 and the first sub-adjustment circuit 521 are used to adjust the capacitance value of the antenna 10. The second sub-matching circuit 132 cooperates with at least one of the sub-adjustment circuits 522, 523, and 524 to adjust the inductance value of the antenna 10, which can make the antenna 10 have different inductance and capacitance, thereby making the antenna 10 form different LC resonances and making the antenna 10 resonate at different frequency points.

[0088] In this embodiment, the first sub-matching circuit 131 includes a first matching capacitor C21 and a second matching capacitor C22. One end of the first matching capacitor C21 is electrically connected to the signal source 140, the other end of the first matching capacitor C21 is electrically connected to the second matching capacitor C22, and the connection point of the first matching capacitor C21 and the second matching capacitor C22 is electrically connected to the regulating capacitor C11.

[0089] Since the first sub-switch unit 511 is electrically connected to the first sub-adjustment circuit 521, when the first sub-switch unit 511 is turned on, one end of the adjustment capacitor C11 is electrically connected to the connection point between the first matching capacitor C21 and the second matching capacitor C22, and the other end of the adjustment capacitor C11 is electrically connected to the end of the second matching capacitor C22 away from the first matching capacitor C21 (marked as point B in the schematic diagram); when the first sub-switch unit 511 is turned off, the other end of the adjustment capacitor C11 is disconnected from the end of the second matching capacitor C22 away from the first matching capacitor C21, in other words, the adjustment capacitor C11 is disconnected from point B. Therefore, the on / off state of the first switch unit 51 causes a change in the capacitance value in the antenna 10.

[0090] The second sub-matching circuit 132 includes a first matching inductor L21 and a second matching inductor L22. One end of the first matching inductor L21 is electrically connected to the end of the second matching capacitor C22 away from the first matching capacitor C21 (i.e., point B), and is electrically connected to the common terminal A of the switching unit 51; the other end of the first matching inductor L21 is electrically connected to the first feed point K1; one end of the second matching inductor L22 is electrically connected to the first feed point K1, and the other end is grounded.

[0091] Since the second sub-adjustment circuit 522 includes a first inductor L11, the third sub-adjustment circuit 523 includes a second inductor L12, and the fourth sub-adjustment circuit 524 includes a third inductor L13; and the second sub-matching circuit 132 includes a first matching inductor L21 and a second matching inductor L22, when one or more of the second sub-adjustment circuit 522, the third sub-adjustment circuit 523, and the fourth sub-adjustment circuit 524 are electrically connected to the common terminal A, they will cooperate with the second sub-matching circuit 132 to form different inductance values.

[0092] Optionally, in this embodiment, the antenna assembly 1 further includes a fourth inductor L14, one end of which is electrically connected to the first feed source S, and the other end is electrically connected to the first sub-matching circuit 131. The fourth inductor L14 is used to cooperate with the second sub-matching circuit 132, the second sub-adjustment circuit 522, the third sub-adjustment circuit 523, and the fourth sub-adjustment circuit 524 to adjust the inductance value of the first antenna element 10, particularly the inductance values ​​of the first radiator 11 and the second radiator 12.

[0093] In another embodiment, the value of the fourth inductor L14 can be zero. In other words, the antenna assembly 1 does not include the fourth inductor L14.

[0094] Therefore, in this application, the adjustment circuit 50, in conjunction with the first matching circuit 13, can match and adjust the parameters such as capacitance and inductance of the first antenna unit 10 to achieve LC tuning.

[0095] like Figure 12 As shown, a decoupling structure 30 is electrically connected between the second radiator 12 and the third radiator 21. An isolation capacitor C1 is connected between the second grounding point G1 of the second radiator 12 and ground, and an isolation capacitor C2 is connected between the third grounding point G3 of the third radiator 21 and ground. An isolation capacitor C3 is connected between the first matching circuit 13 and the second radiator 12, and an isolation capacitor C4 is also connected between the second matching circuit 22 and the third radiator 21.

[0096] In any of the above embodiments, the decoupling structure 30 is a slender electrical wire, such as a circular or flat slender electrical wire. Specifically, the cross-sectional area of ​​the decoupling structure 30 can be in the millimeter or micrometer range, for example, less than 1 square millimeter, etc. The cross-sectional area of ​​the decoupling structure 30 refers to the area of ​​a cross-section cut perpendicular to the cut surface of the decoupling structure 30. By making the decoupling structure 30 a slender electrical wire, the generation of radiation signals by the decoupling structure 30 can be effectively avoided, thus preventing interference with the first radiator 11, the second radiator 12, and the third radiator 21.

[0097] In this application, the decoupling structure 30 is an electrical conductor made of metal, such as copper, iron, copper-iron alloy, etc.

[0098] Please see Figure 13 This is a structural block diagram of an electronic device 100 according to an embodiment of this application. The electronic device 100 includes the antenna assembly 1 described in any of the foregoing embodiments.

[0099] like Figure 13 As shown, the electronic device 100 further includes a sensor controller 2 and a processor 3. When at least the second radiator 12 and the third radiator 21 are multiplexed as proximity sensing elements, the sensor controller 2 is electrically connected to the second radiator 12 and the third radiator 21, and generates proximity sensing data upon receiving a sensing signal generated by the proximity sensing element. The processor 3 is connected to the sensor controller 2 and receives the proximity sensing data, and performs corresponding proximity sensing control based on the proximity sensing data.

[0100] In some embodiments, the processor 3 performs corresponding proximity sensing control based on the proximity sensing data, and may further include: the processor 3 controlling the reduction of the radiation power of the radiator multiplexed as a proximity sensing element based on the sensing data. Specifically, when at least the second radiator 12 and the third radiator 21 are multiplexed as proximity sensing elements, the processor 3 may control the reduction of the radiation power of at least the second radiator 12 and the third radiator 21.

[0101] In some embodiments, since the first radiator 11 is disposed close to the second radiator 12 and the third radiator 21, the processor 3 can further control and reduce the radiation power of the first radiator 11. In some embodiments, when the antenna assembly 1 further includes a fourth radiator 14, the processor 3 can further control the radiation power of the fourth radiator 14.

[0102] The processor 3 controls the reduction of the radiation power of the first radiator 11, the second radiator 12, and the fourth radiator 14, which can be achieved by controlling the reduction of the operating power of the first feed source S1. The processor 3 controls the reduction of the radiation power of the third radiator 11, which can be achieved by controlling the reduction of the operating power of the second feed source S2.

[0103] Therefore, by controlling and reducing the radiation power of these radiators, the SAR (specific absorption rate) can be effectively reduced, ensuring that the SAR meets safety requirements when a human body is close, thus avoiding harm to the human body.

[0104] Obviously, in other embodiments, the proximity sensing control performed by the processor 3 may also include controlling the screen to turn off, controlling the adjustment of the current playback volume, etc. Among these, controlling the adjustment of the current playback volume may mean lowering the current playback volume.

[0105] Please see Figure 14 This is a partial structural schematic diagram of the electronic device 100 in one embodiment of this application. Figure 14 The antenna assembly 1 shown includes a first radiator 11, a second radiator 12, a third radiator 21, a fourth radiator 14, and at least one metal sheet 40. (The last sentence appears to be incomplete and possibly refers to a technical detail.) Figure 14 As shown, the sensing controller 2 can be electrically connected to the third radiator 21. Since the second radiator 12, at least one metal plate 40 and the third radiator 21 are electrically connected together through the decoupling structure 30, they are equivalent to a single metal component, that is, equivalent to a single proximity sensing element. Therefore, the sensing controller 2 is electrically connected to the third radiator 21, which is equivalent to being electrically connected to both the at least one metal plate 40 and the second radiator 12 at the same time.

[0106] Therefore, when a human body approaches, the proximity sensing element of the entire system generates a sensing signal, which is received by the sensing controller 2 and generates proximity sensing data. The processor 3 receives the proximity sensing data and can perform corresponding proximity sensing control.

[0107] Among them, such as Figure 14 As shown, an isolation inductor L1 is also connected between the induction controller 2 and the third radiator 21. The isolation inductor L1 is used to filter out interference from high-frequency signals, that is, to filter out interference from the power supply signal, so as to avoid false detection and not affect the normal operation of the third radiator 21, etc.

[0108] Since the second radiator 12, at least one metal plate 40, and the third radiator 21 are electrically connected together through the decoupling structure 30, they are equivalent to a single metal component. The sensing controller 2 can also be electrically connected to either the second radiator 12 or the at least one metal plate 40. The antenna assembly 1 may also include only... Figure 1 The first radiator 11, the second radiator 12, and the third radiator 21 shown may, or may only include, the following: Figure 6 The first radiator 11, the second radiator 12, the third radiator 21, and at least one metal sheet 40 are shown. That is, Figure 14 The electronic device 100 shown may include the structure of the antenna assembly 1 in any of the foregoing embodiments.

[0109] Please see Figure 15 This is a partial structural schematic diagram of an electronic device 100 according to another embodiment of this application. Figure 14 The antenna assembly 1 shown includes a first radiator 11, a second radiator 12, a third radiator 21, a fourth radiator 14, and at least one metal sheet 40. Wherein, as... Figure 15 As shown, the fourth grounding point G4 of the fourth radiator 14 is connected to the ground with an isolation capacitor C14, and the fourth radiator 14 exhibits a floating effect and is also used as a proximity sensing element.

[0110] Among them, such as Figure 15As shown, the sensing controller 2 is connected to both the second radiator 12 and the fourth radiator 14. The second radiator 12, at least one metal plate 40, and the third radiator 21 are electrically connected together via a decoupling structure 30, forming a single proximity sensing element. The fourth radiator 14 functions as another proximity sensing element. The sensing controller 2 generates proximity sensing data upon receiving a sensing signal generated by the fourth radiator 14 sensing a human approach and / or a sensing signal generated by at least one of the second radiator 12, the third radiator 21, or at least one metal plate 40 sensing a human approach. The processor 3 receives the proximity sensing data and can perform corresponding proximity sensing control.

[0111] In this application, "connection" includes the aforementioned "electrical connection" and "coupling", as well as direct connection and indirect connection.

[0112] The expressions A and / or B in this application include the meanings of A and B, A or B, etc.

[0113] The antenna assembly 1 may also include only Figure 1 The first radiator 11, the second radiator 12, the third radiator 21, and the fourth radiator 14 shown are excluded. That is, the at least one metal sheet 40 may not be included.

[0114] Please see Figure 16 This is a schematic plan view of the internal structure of an electronic device provided according to an embodiment of this application. The electronic device 100 has a top 1a and a bottom 1b, and the antenna assembly 1 can be disposed on the top 1a.

[0115] The term "top 1a" refers to the portion of the electronic device 1 located at the top when placed vertically or in use, while "bottom 1b" is the portion of the electronic device 100 located below it, opposite to "top 1a," and typically includes connection interfaces such as USB ports. For example, when the electronic device 1 is used in portrait mode, "top 1a" is the portion at the top of the electronic device 1, meaning it is usually positioned away from the ground; while "bottom 1b" is the portion of the electronic device 1 adjacent to the ground, meaning it is usually positioned close to the ground.

[0116] As previously described, in some embodiments, when the antenna assembly 1 simultaneously includes the first radiator 11, the second radiator 12, the third radiator 21, and the fourth radiator 14, the first radiator 11 and the fourth radiator 14 may be metal frame antennas, specifically two spaced metal frame segments formed by opening the slot F1 in the metal frame of the electronic device 100. The first radiator 11 and the fourth radiator 14 may be formed by opening the slot in the metal frame located at the top 1a. The second radiator 12 and the third radiator 21 may be flexible printed circuit (FPC) antenna radiators, laser direct structural (LDS) antenna radiators, or printed direct structural (PDS) antenna radiators. Furthermore, the second radiator 12 and the third radiator 21 are disposed close to the first radiator 11. Figure 16 As shown, the antenna assembly 1 is approximately located at the upper right corner of the electronic device 100 when the display screen is facing upwards.

[0117] Obviously, in other embodiments, the first radiator 11 and the fourth radiator 14 can also be formed by the frame at other locations, for example, they can be formed by the left frame, the right frame, etc. of the electronic device 100, and the second radiator 12 and the third radiator 21 can be close to the first radiator 11.

[0118] The electronic device 100 also includes other components, such as a back cover, a display screen, etc., which are not related to the improvement of this invention and will not be described in detail.

[0119] The electronic devices 100 involved in the embodiments of the present invention may include various handheld devices such as mobile phones and tablets with radiators, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as electronic devices.

[0120] Therefore, in this application, by designing the antenna assembly 1, including a first antenna element 10 supporting multiple frequency bands and a second antenna element 20 supporting other frequency bands, coverage of multiple frequency bands is achieved. Furthermore, the first antenna element 10 consists of a first radiator 11 and a second radiator 12, both of which share a first matching circuit 13 and a first feed source S1, saving internal space and reducing the number of components, thus lowering costs. Simultaneously, the decoupling structure 30 improves the isolation between two radiators with overlapping frequency bands, avoiding interference between radiators and effectively improving antenna performance and communication quality. In addition, at least some radiators are reused as proximity sensing elements, enabling human proximity sensing and proximity control, reducing the number of sensors required.

[0121] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0122] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An antenna assembly, characterized in that, include: A first antenna element includes a first radiator, a second radiator, a first feed source, and a first matching circuit. The first radiator includes a first feed point and a first ground point, and the second radiator includes a second feed point and a second ground point. The first matching circuit is connected between the first feed source and the feed points of the first and second radiators. The first feed source provides feed signals to the first and second radiators through the first matching circuit. The first radiator supports the transmission and reception of radio frequency signals in at least a first frequency band, and the second radiator supports the transmission and reception of radio frequency signals in a second frequency band. The second antenna unit includes a third radiator, a second feed source, and a second matching circuit. The third radiator includes a third feed point and a third ground point. The second matching circuit is connected between the second feed source and the feed point of the third radiator. The second feed source provides a feed signal to the third radiator through the second matching circuit. The third radiator supports the transmission and reception of radio frequency signals in a third frequency band, wherein the third frequency band at least partially overlaps with the second frequency band. The first ground point, the second ground point, and the third ground point are grounded. A decoupling structure is connected between the second radiator and the third radiator to improve the isolation between the second radiator and the third radiator; Wherein, the first radiator extends through the third radiator and the second radiator, the third radiator and the second radiator are located on the same side of the first radiator, wherein the decoupling structure includes at least a portion located between the first radiator and the third radiator and a portion located between the first radiator and the second radiator.

2. The antenna assembly according to claim 1, characterized in that, The second radiator and the third radiator are coupled to generate a first current, and the decoupling structure is used to generate a second current. The second current has the same amplitude as the first current, and the phase difference is 90°-270°.

3. The antenna assembly according to claim 2, characterized in that, One end of the decoupling structure is connected to a first preset position of the second radiator, and the other end of the decoupling structure is connected to a second preset position of the third radiator; the first preset position is the second feed point or any position between the second feed point and the second ground point, and the second preset position is the third feed point or any position between the third feed point and the third ground point.

4. The antenna assembly according to claim 3, characterized in that, The electrical length of the first current generated by the mutual coupling between the second radiator and the third radiator is the target electrical length. The absolute value of the difference between the electrical length of the decoupling structure and the target electrical length is m + 2nπ, where m is π / 2 to 3. The value in π / 2, where n is 0 or a positive integer.

5. The antenna assembly according to claim 4, characterized in that, The second radiator and the third radiator are reused as a proximity sensing element to generate a sensing signal when a human body approaches.

6. The antenna assembly according to claim 5, characterized in that, An isolation capacitor is connected between the second grounding point and the ground, and between the third grounding point and the ground.

7. The antenna assembly according to claim 5, characterized in that, in, Isolation capacitors are connected between the first matching circuit and the second radiator, and between the second matching circuit and the third radiator.

8. The antenna assembly according to claim 5, characterized in that, The antenna assembly further includes at least one metal sheet, which is electrically connected to the decoupled structure. The metal sheet also serves as a proximity sensing element and is electrically connected to the second radiator and the third radiator through the decoupled structure to form an integral proximity sensing element.

9. The antenna assembly according to claim 8, characterized in that, The connection point between the at least one metal sheet and the decoupling structure is located at the end of the at least one metal sheet closer to the first radiator, so that the radiating end of the at least one metal sheet is far away from the first radiator.

10. The antenna assembly according to claim 8, characterized in that, The decoupling structure is a bent line, which extends at least between the second radiator and the at least one metal sheet, and between the at least one metal sheet and the third radiator.

11. The antenna assembly according to any one of claims 1-10, characterized in that, The decoupling structure is a slender electrical wire.

12. The antenna assembly according to any one of claims 1-10, characterized in that, The first frequency band includes the MB band and the HB band. The first antenna element further includes a fourth radiator. There is a gap between the fourth radiator and the first radiator, and the fourth radiator is coupled to the first radiator through the gap. The fourth radiator has a fourth grounding point. The first grounding point is located at the end of the first radiator away from the gap, and the fourth grounding point is also located at the end of the fourth radiator away from the gap. The first radiator and the fourth radiator are coupled to form at least two resonant modes. The at least two resonant modes cooperate with each other to support the transmission and reception of radio frequency signals in the MB band and the HB band at the same time, or cooperate with each other to support the transmission and reception of radio frequency signals in the MB band of LTE and the MB band of NR at the same time, or cooperate with each other to support the transmission and reception of radio frequency signals in the HB band of LTE and the HB band of NR at the same time.

13. The antenna assembly according to claim 12, characterized in that, An isolation capacitor is connected between the fourth grounding point of the fourth radiator and the ground. The fourth radiator is reused as a proximity sensing element to generate a sensing signal when a human body approaches.

14. An electronic device, characterized in that, The electronic device includes an antenna assembly as described in any one of claims 1-12.

15. The electronic device according to claim 14, characterized in that, The electronic device further includes a sensor controller and a processor. When the second radiator and the third radiator of the antenna assembly are multiplexed as a proximity sensing element, they are used to generate a sensing signal when a human body approaches. The sensor controller is used to generate proximity sensing data when it receives the sensing signal. The processor is connected to the sensor controller and is used to receive the proximity sensing data and perform corresponding proximity sensing control based on the proximity sensing data.

16. The electronic device according to claim 15, characterized in that, The processor performs corresponding proximity sensing control based on the proximity sensing data, including controlling the processor to at least reduce the radiation power of the second radiator and the third radiator.

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