Cavity antenna and electronic device

Abstract

The present disclosure relates to a cavity antenna and an electronic device. The cavity antenna comprises an antenna body, a functional part and a metal part. The antenna body is arranged as a cavity structure. The functional part is located on one side of the antenna body. The functional part comprises a reserved area. The reserved area is located in an antenna clearance area of the antenna body. A projection of the antenna body on the functional part is located in the reserved area. The metal part is arranged in the reserved area. The metal part is located in a radiation aperture range of a feed point of the antenna body. The metal part is connected to the antenna body in an electromagnetic coupling mode. The metal part is arranged in the reserved area. The metal part is located in the radiation aperture range of the feed point of the antenna body. The metal part is electromagnetically coupled to the antenna body. The radiation signal of the antenna body is enhanced. The actual performance of the cavity antenna is improved. The signal quality of the antenna is improved. The user experience is improved.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a cavity antenna and electronic device. Background Technology

[0002] A cavity antenna is an antenna structure that uses a metal cavity structure to resonate and amplify radio waves in a specific frequency band, thereby improving the antenna's radiation efficiency and directivity. Due to its high radiation efficiency, it is easy to integrate into the interior of electronic devices and is therefore widely used in electronic devices.

[0003] However, the performance of cavity antennas is affected by their size. When the cavity antenna occupies a small volume, the antenna performance will be poor, which will affect the user's communication experience. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a cavity antenna and an electronic device.

[0005] According to a first aspect of the present disclosure, a cavity antenna is provided, comprising:

[0006] The antenna body is configured as a cavity structure;

[0007] A functional component is located on one side of the antenna body. The functional component includes a clearance area, which is located in the antenna clearance area of ​​the antenna body. The projection of the antenna body onto the functional component is located within the clearance area.

[0008] A metal component is disposed in the avoidance area. The metal component is located within the radiation aperture range of the feed point of the antenna body. The metal component is connected to the antenna body by electromagnetic coupling.

[0009] In this embodiment, a metal component is provided in the avoidance area, and the metal component is located within the radiation aperture range of the feed point of the antenna body. The metal component is electromagnetically coupled to the antenna body, which enhances the radiation signal of the antenna body, thereby improving the actual performance of the cavity antenna, improving the signal quality of the antenna, and enhancing the user experience.

[0010] In one possible implementation, the functional component includes a support member, the antenna body and the metal member are both disposed on the support member, and the antenna body and the metal member are both located within the avoidance area of ​​the support member.

[0011] In this embodiment, the antenna body and the metal part are mounted on the support, which fixes and supports the antenna body and the metal part, thereby improving the structural stability of the cavity antenna.

[0012] In one possible implementation, the support member includes a first surface and a second surface that are opposite to each other, the antenna body is disposed in the avoidance area of ​​the first surface, and the metal member is disposed in the avoidance area of ​​the second surface.

[0013] In this embodiment of the disclosure, the antenna body and the metal parts are arranged on opposite sides of the support, which can reduce the overall area occupied by the cavity antenna and facilitate the miniaturization and compact design of the antenna.

[0014] In one possible implementation, the cavity antenna includes a feed extension, the support member is provided with a feed terminal, one end of the feed extension is electrically connected to the antenna body, and the other end of the feed extension is electrically connected to the feed terminal.

[0015] In this embodiment of the disclosure, by setting a feed extension section that electrically connects the antenna body and the feed terminal, the antenna body is fed, enabling the antenna body to radiate antenna signals of the required frequency band and ensuring the normal operation of the antenna body.

[0016] In one possible implementation, the antenna body includes a sidewall and a bottom wall, the bottom wall being connected to a first surface of the support member, the feed extension being bent and extending from a portion of the sidewall toward the bottom wall, the feed extension penetrating the bottom wall and the support member and extending to a second surface of the support member.

[0017] In this embodiment, the feed extension penetrates the bottom wall and the support member and extends to the second surface of the support member, thereby facilitating connection with the feed end disposed on the second surface to feed the antenna body.

[0018] In one possible implementation, the cavity antenna includes a plurality of first grounding connectors disposed on the second surface and surrounding the antenna body.

[0019] In this embodiment of the disclosure, a plurality of first grounding connectors are arranged around the antenna body to improve the reliability of the grounding connection.

[0020] In one possible implementation, the functional component includes a metal layer that avoids the avoidance area. A portion of the first grounding connectors are disposed in the area where the metal layer is located and are electrically connected to the metal layer. Another portion of the first grounding connectors are disposed in the avoidance area. The first grounding connectors located in the avoidance area are electrically connected to the metal layer through conductive connection portions.

[0021] In this embodiment, some of the first grounding connectors are disposed on the metal layer, and some of the first grounding connectors are disposed in the avoidance area, which improves design flexibility and enhances the stability and uniformity of the grounding connection.

[0022] In one possible implementation, the support includes at least one of a bracket and a circuit board.

[0023] In this embodiment of the disclosure, the support includes at least one of a bracket and a circuit board. By setting up the metal parts in the existing structure, the flexibility of wiring and space design is improved, and it is easy to save the space occupied by the cavity antenna through reasonable planning.

[0024] In one possible implementation, the functional component includes a metal layer, and the number of metal components is at least one, wherein the metal components are disposed on the functional component by at least one of the following methods:

[0025] The metal component is suspended relative to the metal layer within the avoidance area;

[0026] The metal component is electrically connected to the metal layer via a wiring segment;

[0027] The metal component is electrically connected to the metal layer via a tuning circuit.

[0028] In this embodiment, there are various ways in which metal parts can be disposed on functional parts, and those skilled in the art can make the settings according to actual needs, thereby improving the flexibility of circuit design.

[0029] In one possible implementation, a second grounding connector is provided outside the cavity of the antenna body, and the antenna body is grounded through the second grounding connector.

[0030] In this embodiment of the present disclosure, the antenna body is grounded through a second grounding connector to improve the grounding effect of the antenna.

[0031] In one possible implementation, the surface of the wall of the antenna body that forms the cavity structure is provided with a textured structure to enhance strength.

[0032] In this embodiment of the disclosure, the texture structure is used to enhance the structural strength of the antenna body and prevent the antenna body from deforming and affecting the antenna performance.

[0033] A second aspect of this disclosure provides an electronic device including a cavity antenna as described in the first aspect of this disclosure, the cavity antenna being mounted in a predetermined mounting space of the electronic device.

[0034] In one possible implementation, the electronic device includes a display component, a rear shell, and a mid-frame, the display component, the mid-frame, and the rear shell enclosing a preset mounting space located at the edge of the electronic device.

[0035] In this embodiment of the disclosure, a preset installation space is set at the edge of the electronic device so that the antenna body is located at the edge of the electronic device, thereby avoiding the antenna body being affected by the internal components of the electronic device.

[0036] In one possible implementation, the opening of the antenna body of the cavity antenna is located on the side of the antenna body near the middle frame.

[0037] In one possible implementation, the first grounding connector of the cavity antenna is connected to the rear shell.

[0038] In this embodiment of the disclosure, the antenna body is grounded by setting a first grounding connector.

[0039] In one possible implementation, the second grounding connector of the cavity antenna is connected to the display assembly.

[0040] In this embodiment of the disclosure, a second grounding connector is provided to ground the antenna body and the display component, thereby improving the reliability of the grounding connection.

[0041] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0043] Figure 1 This is a schematic diagram of the overall structure of an electronic device according to an exemplary embodiment.

[0044] Figure 2 This is a schematic diagram of a partial structure of an electronic device according to an exemplary embodiment.

[0045] Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle.

[0046] Figure 4 This is a schematic diagram of the structure of a cavity antenna according to an exemplary embodiment.

[0047] Figure 5 This is a comparison diagram of standing wave curves before and after adopting the technical solution of the present disclosure embodiment.

[0048] Figure 6 This is a comparison chart of antenna efficiency curves before and after adopting the technical solution of the present disclosure embodiment. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0050] A cavity antenna is an antenna structure that uses a metal cavity structure to resonate and amplify radio waves in a specific frequency band, thereby improving the antenna's radiation efficiency and directivity. Due to its high radiation efficiency, it is easy to integrate into the interior of electronic devices and is therefore widely used in electronic devices.

[0051] For electronic devices like mobile phones, the antennas used for communication are generally located on the bezel, also known as bezel antennas. However, for electronic devices like tablets, the back cover directly covers the edge of the display screen. The back cover is generally a single piece without any slots, making it impossible to form a bezel antenna. Therefore, tablets typically use cavity antennas.

[0052] To meet market demand, tablet computers are getting larger and larger screen-to-body ratios, leaving less and less space for cavity antennas. However, the performance of cavity antennas is greatly affected by their size. When the cavity antenna occupies a small volume, it will result in poor antenna performance, affecting the user's communication experience.

[0053] To address the aforementioned technical issues, this disclosure proposes a cavity antenna and an electronic device. The cavity antenna has a metal component disposed within a clearance area, and the metal component is located within the radiation aperture range of the feed point of the antenna body. The metal component is electromagnetically coupled to the antenna body, thereby enhancing the radiated signal of the antenna body, improving the actual performance of the cavity antenna, improving the signal quality of the antenna, and enhancing the user experience.

[0054] According to an exemplary embodiment, such as Figures 1-4As shown, this embodiment of the disclosure provides a cavity antenna, which includes an antenna body 10, functional components, and a metal component 30. The antenna body 10 is configured as a cavity structure, that is, the shape of the antenna body 10 is a cover to form a metal cavity. The cavity antenna has cavities of specific shapes and sizes inside. When electromagnetic waves enter the cavity, they will be reflected back and forth in the cavity to form standing waves and reach a resonance state, thereby enhancing the signal transmission and reception capability of the antenna body 10 in the required frequency band, reducing energy loss, and improving communication efficiency. This embodiment of the disclosure does not impose too many restrictions on the specific shape and size of the antenna body 10. The long side of the antenna body 10 can be provided with an opening 13. The size of the opening 13 is related to the frequency band of the antenna. If the opening 13 is set on the short side of the antenna body 10, it may cause the wavelength of the antenna signal to be longer than the target frequency band. Of course, in actual production design, when the wavelength of the target frequency band is shorter, the opening 13 can also be set on the short side of the antenna body 10. Those skilled in the art can design according to the required target frequency band. This embodiment of the disclosure does not impose too many restrictions on this.

[0055] The functional component 20 is located on one side of the antenna body 10. The functional component 20 includes a clearance area 201, which is located within the antenna clearance area of ​​the antenna body 10. The projection of the antenna body 10 onto the functional component 20 lies within the clearance area 201. A metal component 30 is disposed in the clearance area 201 and is located within the radiation aperture range of the feed point of the antenna body 10. The metal component 30 is connected to the antenna body 10 via electromagnetic coupling.

[0056] The avoidance area 201 can be formed by hollowing out the metal layer, that is, the avoidance area 201 does not have a metal layer, so as to avoid interference with the signal frequency band of the antenna body 10 and thus affect the radiation efficiency. At the same time, the hollowing out process can also leave space for the antenna body 10, so as to expand the cavity aperture, thereby improving the antenna efficiency and reducing the overall space occupation of the cavity antenna.

[0057] An antenna clearance zone refers to the area around an antenna that is not obstructed or interfered with by other objects. The purpose of setting an antenna clearance zone is usually to reduce interference from metallic objects, thereby ensuring radiation efficiency and performance. In this embodiment, the clearance zone 201 is equipped with a metal component 30 to enhance the antenna body 10. A current in the same direction as the antenna body 10 is generated within the metal component 30. The radiated signal generated by the metal component 30 is superimposed on the radiated signal generated by the antenna body 10, thereby enhancing the radiation intensity generated by the antenna body 10 and improving antenna performance.

[0058] The functional component 20 may or may not be connected to the antenna body 10. That is, the antenna body 10 and the metal component 30 may be mounted on the same structure or on different structures. For example, the antenna body 10 may be mounted on a circuit board, and a separate circuit board or bracket may be provided near the antenna body 10 to support the metal component 30. Furthermore, the metal component 30 and the antenna body 10 can be directly connected via wiring, connected via a tuning circuit, or even suspended. All of these methods can enhance the signal of the antenna body 10. This embodiment does not impose excessive limitations on these methods; those skilled in the art can choose according to actual needs.

[0059] In some embodiments, the metal part 30 and the antenna body 10 can be disposed on the same side of the functional component 20 or on different sides. For example, when the antenna body 10 and the metal part 30 are disposed on the same structure, they can be disposed on different sides of the functional component 20; when the antenna body 10 and the metal part 30 are disposed on different structures, they can be disposed on the same side of the functional component 20 or on different sides of the functional component 20. In the cavity antenna of the embodiments of this disclosure, since the position of the feed point can be adjusted, when the area of ​​the avoidance region 201 is large, the metal part 30 and the antenna body 10 can be disposed on the same side of the functional component 20, with the metal part 30 located next to the antenna body 10; while when the area of ​​the avoidance region 201 is small, the metal part 30 and the antenna body 10 can be located on different sides of the functional component 20. As long as the position of the metal part 30 is within the radiation aperture range of the feed point, the specific placement position does not have a significant impact on the antenna performance and can be determined based on the feed point and the avoidance region 201. The embodiments of this disclosure do not impose excessive restrictions on this.

[0060] In some embodiments, the number of metal parts 30 can be one or more. When there are multiple metal parts 30, each metal part 30 is connected to the antenna body 10. Multiple metal parts 30 can be disposed on the same plane or on different planes. For example, multiple stacked functional parts 20 can be disposed, with one metal part 30 disposed on each functional part 20; or metal parts 30 can be disposed on opposite sides of a functional part 20; or multiple layers of metal parts 30 can be inserted into a functional part 20. This disclosure does not impose excessive restrictions on the specific number of metal parts 30; those skilled in the art can select according to actual needs.

[0061] In some embodiments, the metal component 30 is a circular copper plating sheet, with a diameter ranging from 2.8 mm to 3.2 mm and a thickness ranging from 0.024 mm to 0.026 mm. In one example, the circular copper plating sheet has a diameter of 3 mm and a thickness of 0.025 mm. It is understood that the metal component 30 can also be made of other conductive metals or alloys, such as silver, aluminum, or stainless steel, and its shape can be rectangular, triangular, semi-circular, etc. The size and shape of the metal component 30 can be adjusted by those skilled in the art according to the size and frequency band of the antenna; this disclosure does not impose excessive limitations in this regard.

[0062] In some embodiments, the functional component 20 includes a support member. Both the antenna body 10 and the metal component 30 are disposed on the support member, and both are located within the clearance area of ​​the support member. The support member serves to fix and support the antenna body 10 and the metal component 30, improving the structural stability of the cavity antenna. The support member can be an existing structure within the internal structure of the electronic device, or it can be a separately added structure for mounting the antenna body 10 and the metal component 30. This disclosure does not impose excessive limitations on this aspect, and those skilled in the art can choose according to actual needs.

[0063] In some embodiments, the support includes at least one of a bracket and a circuit board. In one example, the support includes a bracket, which may be a camera bracket, a speaker bracket, etc., with a portion of the bracket extending to the location of the antenna body 10 so that the metal piece 30 disposed on the bracket is within the radiation aperture range of the feed point of the antenna body 10. In another example, the support includes a circuit board, which may be, for example, a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit), with the metal piece 30 disposed on the circuit board and within the radiation aperture range of the feed point of the antenna body 10. In yet another example, the support includes a bracket and a circuit board, with a portion of the metal piece 30 disposed on the bracket and a portion disposed on the circuit board, to improve the flexibility of wiring and space design. By using the existing structure to set up the metal piece 30, it is easier to save space occupied by the cavity antenna through reasonable planning.

[0064] In one example, the support includes a first surface 211 and a second surface 212 that are opposite to each other. Figures 3-4 As shown, the antenna body 10 is disposed within the clearance area 201 of the first surface 211, and the metal part 30 is disposed within the clearance area 201 of the second surface 212. By disposing of the antenna body 10 and the metal part 30 on opposite sides of the support member, the overall area occupied by the cavity antenna can be reduced, which is beneficial for achieving miniaturization and compact design of the antenna.

[0065] In some embodiments, the cavity antenna includes a feed extension 12. For example... Figures 3-4 As shown, the support member is provided with a feed terminal. One end of the feed extension 12 is electrically connected to the antenna body 10, and the other end of the feed extension 12 is electrically connected to the feed terminal. By providing the feed extension 12 that electrically connects the antenna body 10 and the feed terminal of the support member, the antenna body 10 can be fed, enabling it to radiate antenna signals in the required frequency band and ensuring its normal operation. The feed extension 12 can be integrally formed with the antenna body 10 or a separate connection structure; this embodiment does not impose excessive limitations on this.

[0066] In one example, the antenna body 10 includes a sidewall 101 and a bottom wall 102. For example... Figures 3-4 As shown, the bottom wall 102 is connected to the first surface 211 of the support member. The feed extension 12 is formed by a portion of the structure of the side wall 101. The feed extension 12 bends and extends toward the bottom wall 101 so that the feed extension 12 passes through the bottom wall 102 and the support member and extends to the second surface 212 of the support member, thereby facilitating connection with the feed end provided on the second surface 212 to realize the feeding of the antenna body 10.

[0067] In one example, the width of the power supply extension 12 ranges from 1.8 mm to 2.2 mm. For example, the width of the power supply extension 12 can be 2 mm.

[0068] In one example, the antenna body 10 and the feed extension 12 can be mounted onto the functional component using SMT (Surface Mounted Technology) to achieve a fixed connection.

[0069] In some embodiments, the functional component 20 includes a metal layer 22. The number of metal components 30 is at least one, and the metal components 30 can be disposed in various ways on the functional component 20, improving the flexibility of circuit design.

[0070] In one example, the metal component 30 is suspended relative to the metal layer 22 within the clearance area 201. The metal component 30 and the metal layer 22 are suspended relative to each other, and both enhance the antenna body 10. In another example, the metal component 30 is electrically connected to the metal layer 22 via a trace segment 31. The metal component 30 and the metal layer 22 are electrically connected to form a whole, enhancing the radiated signal of the antenna body 10. In yet another example, the metal component 30 is electrically connected to the metal layer 22 via a tuning circuit (not shown in the figure). By properly planning and designing the tuning circuit, antenna signals in different frequency bands can be enhanced.

[0071] The tuning circuit may include matching devices such as capacitors and inductors, and may also include multiple tuning branches. The tuning branches are switched by a switch to adjust the antenna frequency band. This embodiment does not impose too many restrictions on this, and those skilled in the art can make settings according to actual needs.

[0072] Of course, it is understood that the metal part 30 can be disposed on the functional part 20 in one of the above examples, or in combination of several of them. This disclosure does not impose too many restrictions on this, and those skilled in the art can choose according to actual needs.

[0073] In some embodiments, the cavity antenna includes a plurality of first grounding connectors 41. The plurality of first grounding connectors 41 are disposed on the second surface 212 and surround the antenna body 10 to conform to the shape of the antenna body 10, thereby improving the uniformity and reliability of the grounding connection. The first grounding connectors 41 may be, for example, grounding springs. The antenna body 10 is connected to a functional component, the grounding spring surrounds the antenna body 10, and is fixedly welded to the functional component 20. The free end of the grounding spring can abut against a structure such as the rear shell of the electronic device or the grounding terminal of a circuit board to achieve antenna grounding.

[0074] In one example, the grounding spring is made of copper. The length of the grounding spring ranges from 1.5mm to 1.9mm, the width ranges from 0.8mm to 1.2mm, and the height ranges from 1mm to 1.4mm. In one example, the dimensions of the grounding spring are 1.7mm * 1mm * 1.2mm. Of course, it is understood that the specific form, material, and dimensions of the first grounding connector 41 can be selected by those skilled in the art according to actual needs, and this disclosure does not impose excessive limitations in this regard.

[0075] In one example, the spacing between two adjacent first grounding connectors 41 ranges from 3mm to 5mm. Of course, it is understood that the spacing between the first grounding connectors 41 can be adaptively adjusted according to the size of the antenna body 10, the size of the first grounding connectors 41, and the number of the first grounding connectors 41. This embodiment does not impose too many restrictions on this.

[0076] In one example, a portion of the first grounding connector 41 is disposed within the avoidance area 201, and a portion of the first grounding connector 41 is disposed outside the avoidance area 201. For example... Figures 3-4As shown, the functional component 20 includes a metal layer 22. The metal layer 22 avoids the avoidance area 201 of the functional component 20. Some of the multiple first grounding connectors 41 are disposed in the area where the metal layer 22 is located and are electrically connected to the metal layer 22. The other part of the first grounding connectors 41 are disposed within the avoidance area 201. The first grounding connectors 41 located in the avoidance area 201 are electrically connected to the metal layer 22 through conductive connection portions. The conductive connection portions can be wiring, or they can be portions of the metal layer retained as connection areas when the avoidance area 201 is formed by hollowing out the metal layer, so as to facilitate welding of the first grounding connectors 41. This embodiment does not impose excessive limitations on this, and those skilled in the art can set it according to actual needs.

[0077] In one example, there are eight first grounding connectors 41. Two of the first grounding connectors 41 are disposed within the avoidance area 201, and these two first grounding connectors 41 are located at opposite ends of the length of the avoidance area 201. The remaining six first grounding connectors 41 are disposed along the length of the avoidance area 201 (i.e., the length of the antenna body 10) to improve the stability and uniformity of the connection. The number and placement of the first grounding connectors 41 can be adjusted by those skilled in the art according to actual needs, and this embodiment does not impose excessive limitations in this regard.

[0078] In some embodiments, a second grounding connector 42 is provided outside the cavity of the antenna body 10. The antenna body 10 is grounded through the second grounding connector 42 to improve the grounding effect of the antenna. The number of second grounding connectors 42 can be one or more, and the embodiments of this disclosure do not impose excessive restrictions on the number of second grounding connectors 42.

[0079] In one example, the second grounding connector 42 is conductive foam with dimensions of 12mm*3mm*1.2mm. Of course, the second grounding connector 42 can also be other types of connectors, and its dimensions can be set by those skilled in the art according to actual needs. This disclosure does not impose too many restrictions on this aspect.

[0080] In some embodiments, the antenna body 10 operates in the WiFi 5G band, i.e., at a frequency of 5.15 GHz to 5.85 GHz. The length of the antenna body 10 ranges from 22.8 mm to 23.2 mm, the width from 3.8 mm to 4.2 mm, and the height from 1.2 mm to 1.6 mm. In one example, the antenna body 10 measures 23 mm * 4 mm * 1.4 mm. It is understood that the dimensions of the antenna body 10 need to be designed according to the required frequency band. When the antenna body 10 is used to radiate signals in other frequency bands, those skilled in the art can calculate, simulate, and conduct debugging experiments to obtain the dimensions of the antenna body 10 based on the required frequency band. This disclosure does not impose excessive limitations on the dimensions of the antenna body 10.

[0081] In some embodiments, the surface of the wall of the antenna body 10 that forms the cavity structure is provided with a textured structure (not shown in the figure). The textured structure is used to enhance the structural strength of the antenna body 10 and prevent the antenna body 10 from deforming and affecting the antenna performance. The textured structure can be provided on the inner surface of the wall that forms the cavity structure or on the outer surface of the wall that forms the cavity structure. The embodiments of this disclosure do not impose too many restrictions on this, and those skilled in the art can choose according to the actual processing conditions.

[0082] The following will combine Figures 5-6 The technical effects of the embodiments disclosed herein will be described in detail.

[0083] like Figure 5 As shown, Figure 5 This is a comparison chart of standing wave (SWR) curves before and after adopting the technical solution of this disclosure embodiment. The horizontal axis represents frequency in GHz, and the vertical axis represents SWR efficiency in dB. Curve a represents the SWR curve before adopting the technical solution of this disclosure embodiment, and curve b represents the SWR curve after adopting the technical solution of this disclosure embodiment. Comparing curves a and b, it can be seen that in the WiFi 5G band (5.15GHz~5.85GHz), the SWR is significantly reduced after adopting the technical solution of this disclosure embodiment, indicating improved effective transmission of antenna signals, i.e., improved antenna efficiency.

[0084] like Figure 6 As shown, Figure 6This is a comparison of antenna efficiency curves before and after adopting the technical solution of this disclosure. The horizontal axis represents frequency in GHz, and the vertical axis represents antenna efficiency in dB. Curve c represents the theoretical limit curve of antenna efficiency before adopting the technical solution of this disclosure, and curve d represents the theoretical limit curve of antenna efficiency after adopting the technical solution of this disclosure. It can be seen that after adopting the technical solution of this disclosure, the theoretical limit of antenna efficiency in the WiFi 5G band is slightly higher than before. Curve e represents the actual antenna efficiency curve before adopting the technical solution of this disclosure, and curve f represents the actual antenna efficiency curve after adopting the technical solution of this disclosure. It can be seen that after adopting the technical solution of this disclosure, the actual antenna efficiency in the WiFi 5G band is significantly higher than before. The coordinates of point 1 on curve e are (5.15, -9.43), the coordinates of point 2 on curve e are (5.85, -6.03), the coordinates of point 3 on curve f are (5.15, -7.44), and the coordinates of point 4 on curve f are (5.85, -4.98). It can be seen that after adopting the technical solution of this embodiment, the efficiency of the antenna is improved by about 2dB at both 5.15GHz and 5.85GHz, indicating that the technical solution of this embodiment has a significant improvement on antenna performance.

[0085] According to an exemplary embodiment, such as Figures 1-4 As shown, this disclosure provides an electronic device, which may be, for example, a mobile terminal, tablet computer, laptop computer, smart bracelet, or other electronic device with communication functions. The electronic device includes a cavity antenna as described in the above embodiments, and the cavity antenna is installed in a preset installation space of the electronic device.

[0086] The cavity antenna includes an antenna body 10, a functional component 20, and a metal component 30. The antenna body 10 is configured as a cavity structure. The functional component 20 is located on one side of the antenna body 10 and includes a clearance area 201 located within the antenna clearance area of ​​the antenna body 10. The projection of the antenna body 10 onto the functional component 20 lies within the clearance area 201. The metal component 30 is disposed in the clearance area 201 and is located within the radiation aperture range of the feed point of the antenna body 10. The metal component 30 is connected to the antenna body 10 via electromagnetic coupling.

[0087] In some embodiments, the electronic device includes a display component (not shown), a rear housing 52, and a mid-frame 53. The display component, the rear housing 52, and the mid-frame 53 enclose a preset mounting space located at the edge of the electronic device, thereby placing the antenna body 10 at the edge of the electronic device and preventing the antenna body 10 from being affected by the internal components of the electronic device.

[0088] In some embodiments, the opening 13 of the antenna body 10 of the cavity antenna is disposed on the side of the antenna body 10 near the middle frame 53. In this embodiment, the opening 13 is disposed on the long side of the antenna body 10. In actual production design, the opening 13 can also be disposed on the short side of the antenna body 10. The size of the opening 13 is related to the frequency band of the antenna. Those skilled in the art can design it according to the required target frequency band. This embodiment does not impose too many restrictions on this.

[0089] In some embodiments, the electronic device further includes a camera 54. For example... Figures 1-2 As shown, the camera 54 is mounted on the top of the electronic device, the cavity antenna is mounted next to the camera 54, and the functional component 20 can be configured as a camera bracket. Part of the structure of the camera bracket extends to the position of the antenna body 10 so that the metal part 30 mounted on the camera bracket can be located within the radiation aperture range of the feed point of the antenna body 10.

[0090] In some embodiments, the first grounding connector 41 of the cavity antenna is connected to the rear housing 52. The first grounding connector 41 may be, for example, a grounding spring to ground the antenna body 10.

[0091] In some embodiments, the second grounding connector 42 of the cavity antenna is connected to the display component. The second grounding connector 42 may be, for example, conductive foam. By connecting the antenna body 10 to the display component, the antenna body 10 is grounded, and the display component is grounded, thereby improving the safety and stability of the electronic device.

[0092] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0093] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A cavity antenna, characterized in that, include: The antenna body is configured as a cavity structure; A functional component is located on one side of the antenna body. The functional component includes a clearance area, which is located in the antenna clearance area of ​​the antenna body. The projection of the antenna body onto the functional component is located within the clearance area. A metal component is disposed in the avoidance area. The metal component is located within the radiation aperture range of the feed point of the antenna body. The metal component is connected to the antenna body by electromagnetic coupling.

2. The cavity antenna according to claim 1, characterized in that, The functional component includes a support member, and both the antenna body and the metal part are disposed on the support member, and both the antenna body and the metal part are located within the avoidance area of ​​the support member.

3. The cavity antenna according to claim 2, characterized in that, The support member includes a first surface and a second surface that are opposite to each other. The antenna body is disposed in the avoidance area of ​​the first surface, and the metal part is disposed in the avoidance area of ​​the second surface.

4. The cavity antenna according to claim 3, characterized in that, The cavity antenna includes a feed extension section, the support member is provided with a feed end, one end of the feed extension section is electrically connected to the antenna body, and the other end of the feed extension section is electrically connected to the feed end.

5. The cavity antenna according to claim 4, characterized in that, The antenna body includes a side wall and a bottom wall. The bottom wall is connected to a first surface of the support member. The feed extension is bent and extends from a portion of the side wall toward the bottom wall. The feed extension passes through the bottom wall and the support member and extends to a second surface of the support member.

6. The cavity antenna according to claim 3, characterized in that, The cavity antenna includes a plurality of first grounding connectors, which are disposed on the second surface and surround the antenna body.

7. The cavity antenna according to claim 6, characterized in that, The functional component includes a metal layer that avoids the avoidance area. A portion of the first grounding connectors are disposed in the area where the metal layer is located and are electrically connected to the metal layer. Another portion of the first grounding connectors are disposed in the avoidance area. The first grounding connectors located in the avoidance area are electrically connected to the metal layer through a conductive connection portion.

8. The cavity antenna according to any one of claims 2 to 7, characterized in that, The support includes at least one of a bracket and a circuit board.

9. The cavity antenna according to any one of claims 1 to 7, characterized in that, The functional component includes a metal layer, and the number of the metal components is at least one. The metal components are disposed on the functional component by at least one of the following methods: The metal component is suspended relative to the metal layer within the avoidance area; The metal component is electrically connected to the metal layer via a wiring segment; The metal component is electrically connected to the metal layer via a tuning circuit.

10. The cavity antenna according to any one of claims 1 to 7, characterized in that, A second grounding connector is provided outside the cavity of the antenna body, and the antenna body is grounded through the second grounding connector.

11. The cavity antenna according to any one of claims 1 to 7, characterized in that, The surface of the wall of the antenna body that forms the cavity structure is provided with a textured structure to enhance strength.

12. An electronic device, characterized in that, Includes a cavity antenna as described in any one of claims 1 to 11, wherein the cavity antenna is installed in a preset installation space of the electronic device.

13. The electronic device according to claim 12, characterized in that, The electronic device includes a display component, a rear shell, and a mid-frame. The display component, the mid-frame, and the rear shell enclose the preset installation space, which is located at the edge of the electronic device.

14. The electronic device according to claim 13, characterized in that, The opening of the antenna body of the cavity antenna is located on the side of the antenna body near the middle frame.

15. The electronic device according to claim 13, characterized in that, The first grounding connector of the cavity antenna is connected to the rear shell.

16. The electronic device according to claim 13, characterized in that, The second grounding connector of the cavity antenna is connected to the display component.

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