An antenna assembly and electronic device

Abstract

The embodiment of the application discloses an antenna assembly and electronic equipment, the first face and the second face of the medium substrate in the antenna assembly are respectively provided with the first copper clad and the second copper clad, the first copper clad and the second copper clad are respectively provided with the first slit and the second slit, and the first slit and the second slit are oppositely arranged; a Wi-Fi antenna unit is arranged on the first face and located in the first slit; a Wi-Fi module is arranged on the medium substrate and connected with the Wi-Fi antenna unit; an NFC module is arranged on the medium substrate and connected with the first copper clad to take the first copper clad provided with the first slit as an NFC antenna. The first copper clad is taken as the coil of the NFC antenna after the first slit is arranged, material of the traditional coil structure and mounting procedures are saved, cost is reduced, the hollowed-out area on the metal shell is reduced due to the absence of the traditional coil structure, the electronic product has good appearance and structural strength, and the Wi-Fi and the NFC are integrated on the antenna assembly and can be collectively and one-time authenticated, thereby reducing authentication cost.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more particularly to an antenna assembly and an electronic device. Background Technology

[0002] With the advancement of wireless communication technology, it has been applied to electronic devices, and the wireless communication function in electronic devices requires the support of antennas.

[0003] Currently, some electronic devices are required to have Wi-Fi and NFC functions. To meet these requirements, Wi-Fi antennas and NFC antennas need to be installed inside the electronic device. However, NFC antennas are generally made of wires wound into a closed coil, which makes the NFC antenna occupy the structural area of ​​the electronic device. In addition, it increases the assembly process of the NFC antenna and requires separate certification of the NFC antenna. Summary of the Invention

[0004] The purpose of this invention is to provide an antenna assembly and an electronic device to solve the problems of currently setting up Wi-Fi antennas and NFC antennas separately in electronic devices, which include the NFC antenna occupying the structure of the electronic device, requiring the metal casing to be hollowed out, increasing the NFC assembly process, and requiring separate authentication of the NFC antenna.

[0005] To achieve this objective, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, an antenna assembly is provided, comprising:

[0007] A dielectric substrate, wherein a first copper-clad surface and a second copper-clad surface are respectively provided on a first surface and a second copper-clad surface opposite to each other, and a first gap and a second gap are respectively provided in the first copper-clad surface and the second copper-clad surface, and the first gap and the second gap are arranged opposite to each other.

[0008] A Wi-Fi antenna unit is disposed on the first surface and located within the first gap;

[0009] A Wi-Fi module is disposed on the dielectric substrate and electrically connected to the Wi-Fi antenna unit;

[0010] An NFC module is disposed on the dielectric substrate and electrically connected to the first copper-clad surface, so that the first copper-clad surface with the first gap is used as an NFC antenna.

[0011] In a second aspect, embodiments of the present invention provide an electronic device, the electronic device including a display screen, a metal frame surrounding the display screen, and an antenna assembly as described in the first aspect;

[0012] The metal frame has a third gap, the antenna assembly is located inside the electronic device, the second side of the dielectric substrate of the antenna assembly is connected to the side of the metal frame facing the inside of the electronic device, and the second gap on the second side is directly opposite to the third gap on the metal frame.

[0013] The antenna assembly of this invention includes a dielectric substrate. A first copper-clad surface and a second copper-clad surface are respectively disposed on a first and a second opposite surface of the dielectric substrate. A first gap and a second gap are respectively disposed within the first and second copper-clad surfaces, and the first and second gaps are directly opposite each other. A Wi-Fi antenna unit is disposed within the first gap, a Wi-Fi module is disposed and electrically connected to the Wi-Fi antenna unit, and an NFC module is electrically connected to the first copper-clad surface. The first copper-clad surface with the first gap serves as the NFC antenna. By hollowing out the first gap in the first copper-clad surface to serve as the coil of the NFC antenna, the NFC antenna and the Wi-Fi antenna share a single gap. The NFC antenna does not require a traditional coil structure, has a smaller area, saves materials and installation steps required for traditional coil structures, and reduces material and installation costs. Furthermore, the absence of a traditional coil structure reduces the area to be cut out of the metal casing of the electronic product, resulting in a better appearance and structural strength. Moreover, integrating Wi-Fi and NFC into the same antenna assembly allows for joint authentication in a single step, reducing authentication costs. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the first side of the antenna assembly according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the second side of the antenna assembly according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the Wi-Fi antenna and NFC antenna in the antenna assembly of an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the overall structure of the antenna assembly with a metal shield in an embodiment of the present invention;

[0019] Figure 5 for Figure 4 A schematic diagram of the decomposed structure;

[0020] Figure 6 A schematic diagram of the gaps on a metal shielding cover;

[0021] Figure 7This is a schematic diagram of the Wi-Fi antenna structure in an embodiment of the present invention;

[0022] Figure 8 The circuit diagrams of the first and second radio frequency circuits in the embodiments of the present invention are shown.

[0023] Figure 9 This is a schematic diagram of the return loss of the Wi-Fi antenna in an embodiment of the present invention.

[0024] Figure 10 This is a schematic diagram illustrating the isolation between the Wi-Fi antenna and the NFC antenna in the antenna assembly of an embodiment of the present invention;

[0025] Figure 11 This is a schematic diagram illustrating the isolation between the Wi-Fi antenna and the NFC antenna in the Wi-Fi band in an antenna assembly according to an embodiment of the present invention;

[0026] Figure 12 This is a schematic diagram of the overall structure of the electronic device according to an embodiment of the present invention;

[0027] Figure 13 This is a schematic diagram of the connection structure between the antenna assembly and the metal frame in an embodiment of the present invention.

[0028] In the picture:

[0029] 1. Dielectric substrate; 10. First copper-clad surface; 11. Second copper-clad surface; 12. First gap; 121. First side; 122. Second side; 13. Second gap; 14. Wi-Fi antenna unit; 140. First branch; 141. Second branch; 142. Third branch; 143. First L-shaped branch; 144. Fourth branch; 145. Fifth branch; 146. Second L-shaped branch; 147. Connecting branch; 15. Wi-Fi module; 16. First radio frequency circuit; 17. NFC module; 18. Second radio frequency circuit; 2. Conductive component; 3. Metal shield; 31. Gap; 100. Electronic device; 101. Display screen; 102. Metal frame; 1021. Third gap. Detailed Implementation

[0030] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail 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.

[0031] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Example 1

[0034] like Figures 1-3 As shown, an antenna assembly according to an embodiment of the present invention includes a dielectric substrate 1, a Wi-Fi antenna unit 14, a Wi-Fi module 15, and an NFC module 17.

[0035] In this substrate, a first copper-clad surface 10 and a second copper-clad surface 11 are respectively provided on the first and second opposing surfaces of the dielectric substrate 1. A first gap 12 and a second gap 13 are respectively provided in the first copper-clad surface 10 and the second copper-clad surface 11. The first gap 12 and the second gap 13 are arranged opposite each other. Specifically, the first and second surfaces are two opposing surfaces on the dielectric substrate 1 used to carry electronic components. For example, a dielectric substrate 1 usually includes a large upper surface and a lower surface. The upper surface and the lower surface are the opposing first and second surfaces. The first copper-clad surface 10 is usually provided on the first surface, and the second copper-clad surface 11 is provided on the second surface.

[0036] like Figure 1 As shown, a narrow, elongated first gap 12 is provided within the first copper-clad surface 10, such as... Figure 2 As shown, a slender second slit 13 is provided in the second copper-clad surface 11. The outer contours and dimensions of the first slit 12 and the second slit 13 are approximately the same, and the first slit 12 and the second slit 13 are arranged opposite each other in a direction perpendicular to the first surface of the dielectric substrate 1.

[0037] like Figure 1As shown, the Wi-Fi antenna unit 14 is disposed in the first gap 12. The structural shape of the Wi-Fi antenna unit 14 can be set according to actual needs. In this embodiment of the invention, the structural shape of the Wi-Fi antenna unit 14 is not limited.

[0038] The Wi-Fi module 15 can be a Wi-Fi radio frequency chip. The Wi-Fi module 15 can modulate the radiation signals of the Wi-Fi 2.4G, 5G and 6G frequency bands. The Wi-Fi module 15 can be disposed on the dielectric substrate 1.

[0039] The NFC module 17 can be a chip for processing NFC signals. The NFC module 17 can be disposed on the dielectric substrate 1. It should be noted that the Wi-Fi module 15 and the NFC module 17 can be disposed on the first side or the second side of the dielectric substrate 1. The embodiments of the present invention do not limit the position of the Wi-Fi module 15 and the NFC module 17 on the dielectric substrate 1.

[0040] In this embodiment of the invention, the Wi-Fi module 15 is electrically connected to the Wi-Fi antenna unit 14, and the NFC module 17 is electrically connected to the first copper-clad surface 10, so that the first copper-clad surface 10 with the first gap 12 is used as the NFC antenna. Specifically, as shown... Figure 3 As shown, a coil is formed after a first gap 12 is set in the first copper-clad surface 10. This coil can serve as an NFC antenna. At the same time, a Wi-Fi antenna unit 14 is set in the first gap 12. The Wi-Fi signal can be radiated by the disturbance between the Wi-Fi antenna unit 14 and the first gap 12, thus realizing the sharing of the first gap 12 between the NFC antenna and the Wi-Fi antenna.

[0041] The antenna assembly of this invention includes a dielectric substrate. A first copper-clad surface and a second copper-clad surface are respectively disposed on a first and a second opposite surface of the dielectric substrate. A first gap and a second gap are respectively disposed within the first and second copper-clad surfaces, and the first and second gaps are directly opposite each other. A Wi-Fi antenna unit is disposed within the first gap, a Wi-Fi module is disposed and electrically connected to the Wi-Fi antenna unit, and an NFC module is electrically connected to the first copper-clad surface. The first copper-clad surface with the first gap serves as the NFC antenna. By hollowing out the first gap in the first copper-clad surface to serve as the coil of the NFC antenna, the NFC antenna and the Wi-Fi antenna share a single gap. The NFC antenna does not require a traditional coil structure, has a smaller area, saves materials and installation steps required for traditional coil structures, and reduces material and installation costs. Furthermore, the absence of a traditional coil structure reduces the area to be cut out of the metal casing of the electronic product, resulting in a better appearance and structural strength. Moreover, integrating Wi-Fi and NFC into the same antenna assembly allows for joint authentication in a single step, reducing authentication costs.

[0042] like Figure 4 and Figure 5 As shown, in an optional embodiment of the present invention, the antenna assembly further includes a metal shield 3, which is disposed on the first surface. The metal shield 3 has a projection area perpendicularly projected onto the first surface. The Wi-Fi antenna unit 14, the Wi-Fi module 15, and the NFC module 17 are located within the projection area. Specifically, as shown... Figure 4 and Figure 5 As shown, the projection direction of the metal shield 3 is perpendicular to the direction F of the dielectric substrate 1. The projection area of ​​the metal shield 3 onto the dielectric substrate 1 along the direction F is the dashed line area in the figure. The Wi-Fi antenna unit 14, Wi-Fi module 15 and NFC module 17 are in this dashed line area.

[0043] The antenna assembly radiates towards the side of the dielectric substrate 1 with the second copper-clad surface 11. The metal shield 3 can be installed on the side of the dielectric substrate 1 with the first copper-clad surface 10 by means of welding, snap-fit ​​structure, screws, etc., and covers the Wi-Fi antenna unit 14, Wi-Fi module 15 and NFC module 17. On the one hand, it can prevent other electronic devices from causing electromagnetic interference to the Wi-Fi antenna unit 14, Wi-Fi module 15 and NFC module 17 after the antenna assembly is installed inside the electronic device, and it can also prevent the Wi-Fi antenna unit 14, Wi-Fi module 15 and NFC module 17 from causing electromagnetic interference to other electronic devices inside the electronic device, thereby improving the anti-interference capability of the electronic device. On the other hand, the metal shield 3 allows the antenna assembly to radiate signals towards the side with the second copper-clad surface 11, thereby enhancing the strength of the forward signal of the antenna assembly.

[0044] like Figure 6 As shown, in another optional embodiment of the present invention, a gap 31 is provided between any side of the metal shield 3 and the first surface of the dielectric substrate 1. The side of the metal shield 3 refers to the surface of the metal shield 3 that is perpendicular to and connected to the first surface. Specifically, the gap 31 can be an elongated cutout on any side of the metal shield 3 near the side edge of the dielectric substrate 1. For example, the height of the cutout can be 0.5 mm. This gap 31 can suppress the return flow of NFC signals through the metal shield 3, which could lead to a decrease in the intensity of the forward radiation signal.

[0045] like Figure 2 and Figure 6As shown, in an optional embodiment of the present invention, the antenna assembly further includes a conductive element 2, which is disposed on the second surface of the dielectric substrate 1, i.e., on the surface of the dielectric substrate 1 where the second copper-clad surface 11 is disposed. The conductive element 2 is electrically connected to the second copper-clad surface 11. In one example, the conductive element 2 can be a metal spring or conductive foam. The position of the conductive element 2 on the second surface of the dielectric substrate 1 can be determined according to the connection position between the antenna assembly and the electronic device. For example, when the antenna assembly is connected to the metal frame of the electronic device, the conductive element 2 is disposed at a position that provides a better electrical connection between the dielectric substrate 1 and the metal frame. By providing the conductive element 2, the grounding performance of the dielectric substrate 1 can be improved, thereby improving the anti-interference capability of the antenna assembly.

[0046] like Figure 1 and Figure 7 As shown, in an optional embodiment of the present invention, the antenna assembly further includes a first radio frequency circuit 16 and a second radio frequency circuit 18. The first radio frequency circuit 16 and the second radio frequency circuit 18 are disposed on the dielectric substrate 1. The Wi-Fi module 15 is electrically connected to the Wi-Fi antenna unit 14 through the first radio frequency circuit 16, and the NFC module 17 is electrically connected to the first copper-clad surface 10 through the second radio frequency circuit 18. Exemplarily, the Wi-Fi antenna unit 14 may be provided with a Wi-Fi signal feed terminal, and the first copper-clad surface 10 may be provided with an NFC signal feed terminal. The first radio frequency circuit 16 may be electrically connected to the Wi-Fi signal feed terminal, and the second radio frequency circuit 18 may be electrically connected to the NFC signal feed terminal.

[0047] Specifically, the first RF circuit 16 and the second RF circuit 18 can be modules on the dielectric substrate 1 that have filtering, impedance matching, and isolation functions. To more clearly illustrate the first RF circuit 16 and the second RF circuit 18, the following description is provided in conjunction with... Figure 8 The circuit schematics illustrate the first RF circuit 16 and the second RF circuit 18.

[0048] like Figure 8 As shown, Figure 8 M1 in the diagram represents the equivalent circuit of the Wi-Fi antenna unit 14 and the NFC unit. The first radio frequency circuit includes a first isolation capacitor C1. The Wi-Fi module 15 includes a Wi-Fi signal output terminal Wi-Fi_Port. The Wi-Fi antenna unit 14 is provided with a Wi-Fi signal feed terminal (port 1 in M1). The Wi-Fi signal output terminal Wi-Fi_Port of the Wi-Fi module 15 is electrically connected to the Wi-Fi signal feed terminal (port 1 in M1) through the first isolation capacitor C1. The first isolation capacitor C1 can isolate the NFC signal from entering the Wi-Fi module 15, thereby improving the isolation between the Wi-Fi signal and the NFC signal.

[0049] In an optional embodiment of the present invention, the second radio frequency circuit includes a low-pass filter circuit, a balun circuit, an impedance matching circuit, a modulation resistor, and a Wi-Fi signal decoupling capacitor; the NFC module 17 is provided with a first differential signal output terminal and a second differential signal output terminal. Figure 8 The two ends of the NFC_PORT are the first differential signal output terminal and the second differential signal output terminal, respectively. The Wi-Fi antenna unit is equipped with an NFC signal feed terminal.

[0050] The low-pass filter circuit includes a first inductor L1, a second inductor L2, a first capacitor C5, and a second capacitor C6. The first differential signal output terminal is grounded through the first inductor L1 and the first capacitor C5 in sequence, and the second differential signal output terminal is grounded through the second inductor L2 and the second capacitor C6 in sequence. The common node of the first inductor L1 and the first capacitor C5 is connected to the first input terminal of the balun circuit T1, and the common node of the second inductor L2 and the second capacitor C6 is connected to the second input terminal of the balun circuit T1. The impedance matching circuit includes a third capacitor C4 and a fourth capacitor C3. One end of the third capacitor C4 is connected to the output terminal of the balun circuit T1, and the other end is grounded through the fourth capacitor C3. The common node of the third capacitor C4 and the fourth capacitor C3 is connected to the first terminal of the modulation resistor R1. The second terminal of the modulation resistor R1 is grounded through the Wi-Fi signal decoupling capacitor C2. The common node of the modulation resistor R1 and the Wi-Fi signal decoupling capacitor C2 is connected to the NFC signal feed terminal (port 2 in M1).

[0051] The second radio frequency circuit in this embodiment of the invention is provided with a low-pass filter circuit to prevent high-frequency signals from entering the NFC module. An impedance matching circuit is provided to make the first copper-clad surface, which serves as the NFC antenna, impedance-matched with the balun circuit T1. The return loss of the system can be adjusted by the modulation resistor, and the Wi-Fi signal decoupling capacitor C2 can isolate the interference of Wi-Fi signals on the NFC module.

[0052] like Figure 7 The diagram shows a Wi-Fi antenna unit 14 according to the present invention. The Wi-Fi antenna unit includes a first stub 140, a second stub 141, a third stub 142, a first L-shaped stub 143, a fourth stub 144, a fifth stub 145, and a second L-shaped stub 146.

[0053] In this configuration, a first branch 140 extends from the first side 121 of the first slit 12 into the first slit 12, and the first branch 140 is perpendicular to the first side 121. A second branch 141 and a third branch 142 are orthogonal and form a cross shape. The second branch 141 is perpendicular to and connected to the second side 122 of the first slit 12. The second side 122 is a side of the first slit 12 parallel to the first side 121. A first L-shaped branch 143 is located on the side of the second branch 141 away from the first branch 140. One branch of the first L-shaped branch 143 is perpendicularly connected to the first side 121, and the other branch extends away from the first branch 140. Extending in the direction of 40, the fourth branch 144 is located on the side of the first branch 140 away from the second branch 141 and extends from the second side 122 into the first gap 12. The fifth branch 145 is located on the side of the first branch 140 away from the second branch 141 and extends from the first side 121 into the first gap 12. The free ends of the fourth branch 144 and the fifth branch 145 are directly opposite each other and are provided with a gap. The second L-shaped branch 146 is located on the side of the fifth branch 145 away from the first branch 140. One branch of the second L-shaped branch 146 is perpendicularly connected to the first side 121, and the other branch extends in a direction away from the first branch 140.

[0054] Preferably, a Wi-Fi signal input terminal P1 is provided at the end of the second branch 141 near the first side 121 (i.e., Figure 8 Port 1 of M1), a first ground terminal P0 is provided on the first side 121 near the Wi-Fi signal feed terminal P1. Figure 8 Port 3 of M1).

[0055] like Figure 8 As shown, the Wi-Fi antenna unit 14 also includes a connecting stub 147. The connecting stub 147 is located on the side of the fifth stub 145 away from the first stub 140 and is arranged parallel to and spaced apart from the fifth stub 145. The connecting stub 147 spans the gap formed by the free ends of the fourth stub 144 and the fifth stub 145. A tuning capacitor is connected between the fourth stub 144 and the fifth stub 145 through pads P3 and P4. An isolation inductor is connected between one end of the fourth stub 144 and the connecting stub 147 through pads P5 and P6. The other end of the connecting stub 147 serves as the NFC signal feed terminal P8. Figure 8 Port 2 of M1), the free end of the fifth branch is provided with a second grounding terminal P7 ( Figure 8 Port 4 of M1.

[0056] In this embodiment of the invention, a tuning capacitor is connected between the fourth branch 144 and the fifth branch 145 of the Wi-Fi antenna unit 14 via pads P3 and P4, which can adjust the resonant frequency of the Wi-Fi antenna unit. An isolation inductor is connected between the fourth branch 144 and the connecting branch 147 via pads P5 and P6, which can isolate the Wi-Fi signal from being fed into the NFC module. This can both adjust the resonant frequency of the Wi-Fi antenna unit and improve the isolation between the Wi-Fi signal and the NFC signal.

[0057] Figure 9 This is a schematic diagram of the return loss of a Wi-Fi signal, as shown below. Figure 9 As shown, the return loss in the 2.4G and 5G bands of Wi-Fi is below -6.5dB, which can meet the actual design requirements of Wi-Fi.

[0058] Figure 10 This is a diagram illustrating the isolation between Wi-Fi and NFC, as shown below. Figure 10 As shown, the isolation between the two near the 13.56MHz frequency point is greater than 30dB, indicating good isolation.

[0059] Figure 11 This is a diagram illustrating the isolation between Wi-Fi and NFC within the Wi-Fi frequency band, as shown below. Figure 11 As shown, the isolation between the two in the 2.4G and 5G bands of Wi-Fi is greater than 120dB.

[0060] The antenna assembly of this invention uses a first gap carved out of the first copper-clad surface to serve as the coil of the NFC antenna, enabling the NFC antenna and Wi-Fi antenna to share a single gap. The NFC antenna does not require a traditional coil structure, has a small area, and saves on the materials and installation procedures required for traditional coil structures, thus reducing material and installation costs. At the same time, the absence of a traditional coil structure reduces the area to be cut out of the metal casing of electronic products, resulting in better appearance and structural strength. Furthermore, the integration of Wi-Fi and NFC on the same antenna assembly allows for joint authentication in a single step, reducing authentication costs.

[0061] Furthermore, the metal shielding not only improves the anti-interference capability of the antenna assembly, but also enhances the strength of the forward signal of the antenna assembly.

[0062] Furthermore, by setting up a first radio frequency circuit, a second radio frequency circuit, and setting a tuning capacitor and an isolation inductor in the Wi-Fi antenna unit, the isolation between the NFC signal and the Wi-Fi signal is improved, enabling NFC and Wi-Fi to work simultaneously without interfering with each other.

[0063] Example 2

[0064] likeFigure 12 and Figure 13 As shown, an embodiment of the present invention provides an electronic device 100, which includes a display screen 101, a metal frame 102 disposed around the display screen 101, and at least one antenna component provided in Embodiment 1 of the present invention.

[0065] The metal frame 102 is provided with a third gap 1021. The antenna assembly is located inside the electronic device 100. The second side of the dielectric substrate 1 of the antenna assembly is connected to the side of the metal frame 102 facing the inside of the electronic device. The second gap on the second side is directly opposite to the third gap 1021 on the metal frame 102.

[0066] Optionally, the electronic device 100 also includes a speaker, the sound-emitting surface of which is positioned directly opposite the third slit 1021.

[0067] The electronic device of this invention includes the antenna assembly provided in Embodiment 1. In this antenna assembly, the first gap is hollowed out on the first copper-clad surface to serve as the coil of the NFC antenna. This allows the NFC antenna and the Wi-Fi antenna to share a single gap. The NFC antenna does not require a traditional coil structure, has a small area, and saves the materials and installation processes required for traditional coil structures, thus reducing material and installation costs. At the same time, since there is no traditional coil structure, the hollowed-out area on the metal casing of the electronic product is reduced, giving the electronic product a good appearance and structural strength. Furthermore, the integration of Wi-Fi and NFC on the same antenna assembly allows for joint authentication in one go, reducing authentication costs.

[0068] Furthermore, the speaker's sound-emitting surface and the antenna assembly in the electronic device are aligned with the third gap on the metal panel, reducing the number of gaps on the metal panel and improving the appearance and structural strength of the electronic device.

[0069] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0070] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for the purpose of clarifying the device. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0071] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. An antenna assembly, characterized in that, include: A dielectric substrate, wherein a first copper-clad surface and a second copper-clad surface are respectively provided on a first surface and a second copper-clad surface opposite to each other, and a first gap and a second gap are respectively provided in the first copper-clad surface and the second copper-clad surface, and the first gap and the second gap are arranged opposite to each other. A Wi-Fi antenna unit is disposed on the first surface and located within the first gap; A Wi-Fi module is disposed on the dielectric substrate and electrically connected to the Wi-Fi antenna unit; An NFC module is disposed on the dielectric substrate and electrically connected to the first copper-clad surface, so that the first copper-clad surface with the first gap is used as an NFC antenna.

2. The antenna assembly according to claim 1, characterized in that, Also includes: A metal shield is disposed on the first surface, and the metal shield is projected vertically onto the first surface to have a projection area, wherein the Wi-Fi antenna unit, the Wi-Fi module, and the NFC module are located within the projection area.

3. The antenna assembly according to claim 2, characterized in that, A gap is provided between any side of the metal shield and the first surface of the dielectric substrate.

4. The antenna assembly according to claim 1, characterized in that, Also includes: A conductive element is disposed on the second surface and is electrically connected to the second copper-clad surface.

5. The antenna assembly according to claim 4, characterized in that, The conductive component is a metal spring or conductive foam.

6. The antenna assembly according to claim 1, characterized in that, It also includes a first radio frequency (RF) circuit and a second RF circuit, which are disposed on the dielectric substrate. The Wi-Fi module is electrically connected to the Wi-Fi antenna unit through the first RF circuit, and the NFC module is electrically connected to the first copper-clad surface through the second RF circuit.

7. The antenna assembly according to claim 6, characterized in that, The first radio frequency circuit includes a first isolation capacitor, the Wi-Fi module includes a Wi-Fi signal output terminal, the Wi-Fi antenna unit is provided with a Wi-Fi signal feed terminal, and the Wi-Fi signal output terminal of the Wi-Fi module is electrically connected to the Wi-Fi signal feed terminal through the first isolation capacitor.

8. The antenna assembly according to claim 6, characterized in that, The second radio frequency circuit includes a low-pass filter circuit, a balun circuit, an impedance matching circuit, a modulation resistor, and a Wi-Fi signal decoupling capacitor. The NFC module is provided with a first differential signal output terminal and a second differential signal output terminal. The Wi-Fi antenna unit is provided with an NFC signal feed-in terminal. The low-pass filter circuit includes a first inductor, a second inductor, a first capacitor, and a second capacitor. The first differential signal output terminal is grounded through the first inductor and the first capacitor in sequence. The second differential signal output terminal is grounded through the second inductor and the second capacitor in sequence. The common node of the first inductor and the first capacitor is connected to the first input terminal of the balun circuit. The common node of the second inductor and the second capacitor is connected to the second input terminal of the balun circuit. The impedance matching circuit includes a third capacitor and a fourth capacitor. One end of the third capacitor is connected to the output terminal of the balun circuit, and the other end is grounded through the fourth capacitor. The common node of the third capacitor and the fourth capacitor is connected to the first terminal of the modulation resistor. The second terminal of the modulation resistor is grounded through the Wi-Fi signal decoupling capacitor. The common node of the modulation resistor and the Wi-Fi signal decoupling capacitor is electrically connected to the NFC signal feed terminal.

9. The antenna assembly according to any one of claims 1-8, characterized in that, The Wi-Fi antenna unit includes: The first branch extends from the first side of the first gap into the first gap, and the first branch is perpendicular to the first side. The second and third branches are orthogonal, the second branch is perpendicular to the second side of the first gap and connected to the second side, the second side is the side of the first gap that is parallel to the first side; The first L-shaped branch is located on the side of the second branch away from the first branch. One branch of the first L-shaped branch is perpendicularly connected to the first side, and the other branch extends in a direction away from the first branch. The fourth branch is located on the side of the first branch away from the second branch and extends from the second side into the first gap; The fifth branch is located on the side of the first branch away from the second branch and extends from the first side into the first gap. The free ends of the fourth branch and the fifth branch are directly opposite each other and are provided with a gap. The second L-shaped branch is located on the side of the fifth branch away from the first branch. One branch of the second L-shaped branch is perpendicularly connected to the first side, and the other branch extends in a direction away from the first branch.

10. The antenna assembly according to claim 9, characterized in that, The second branch has a Wi-Fi signal feed end near the first side, and the first side has a first grounding end near the Wi-Fi signal feed end.

11. The antenna assembly according to claim 9, characterized in that, Also includes: A connecting branch is located on the side of the fifth branch away from the first branch and is parallel to and spaced apart from the fifth branch. The connecting branch spans the gap formed by the free ends of the fourth branch and the fifth branch. A tuning capacitor is connected between the fourth branch and the fifth branch. An isolation inductor is connected between one end of the fourth branch and the connecting branch. The other end of the connecting branch serves as the NFC signal feed-in terminal. A second ground terminal is provided at the end of the fifth branch closest to the fourth branch.

12. An electronic device, characterized in that, The electronic device includes a display screen, a metal frame surrounding the display screen, and an antenna assembly as described in any one of claims 1-11; The metal frame has a third gap, the antenna assembly is located inside the electronic device, the second side of the dielectric substrate of the antenna assembly is connected to the side of the metal frame facing the inside of the electronic device, and the second gap on the second side is directly opposite to the third gap on the metal frame.

13. The electronic device according to claim 12, characterized in that, It also includes a loudspeaker, the sound-emitting surface of which is positioned directly opposite the third slit.

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