A cavity antenna assembly and terminal device

Abstract

This utility model relates to the field of communication device technology, and discloses a cavity antenna assembly and terminal equipment. The antenna assembly includes: a product bottom shell; a slot disposed on the product bottom shell; a shielding structure disposed on the back of the slot, the outline of the shielding structure being adapted to the outline of the slot; and a feed point disposed within the slot and electrically connected to a radio frequency circuit. The product bottom shell, the slot, and the shielding structure together form a cavity antenna, and the feed point is used to excite the cavity antenna to resonate in a predetermined frequency band. By utilizing the slot in the device as part of the antenna, the overall space is effectively saved while ensuring that the antenna efficiency of the device meets standards, thereby satisfying market requirements for product communication performance.

Description

Technical Field

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

[0002] With the rapid development of smart devices, various devices are equipped with a wealth of functions, efficiently meeting users' needs in life, work, and study. However, the emergence of these functions has led to a significant increase in the power consumption of smart devices, while market demands require smart devices to have long battery life. These factors combined have resulted in increasingly larger batteries, posing a significant challenge to antenna space.

[0003] However, obtaining a more stable signal would require more antennas, which contradicts the current situation. Therefore, improvements to existing technology are necessary.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This invention provides a cavity antenna assembly and electronic device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cavity antenna assembly, comprising:

[0008] Product bottom shell;

[0009] A slot is provided on the bottom shell of the product;

[0010] A shielding structure is disposed on the back of the card slot, and the outline of the shielding structure is adapted to the outline of the card slot;

[0011] The power supply point is located in the slot and is electrically connected to an radio frequency circuit;

[0012] The product's bottom shell, the card slot, and the shielding structure together form a cavity antenna, and the feed point is used to excite the cavity antenna to resonate in a predetermined frequency band.

[0013] Optionally, the shielding structure includes:

[0014] Grounded metal parts;

[0015] Conductive foam electrically connected to the metal component;

[0016] The shielding structure is a continuous structure.

[0017] Optionally, the shielding structure includes a plurality of spaced-apart springs.

[0018] Optionally, the shielding structure completely encloses the open portion on the back of the card slot.

[0019] Optionally, the card slot is a SIM card slot or a memory card slot, and the bottom cover of the product is a battery cover or a back cover.

[0020] Optionally, the slot is provided with multiple candidate power supply positions, and the power supply point can be selectively arranged at any of the multiple candidate power supply positions.

[0021] Optionally, each of the feed points arranged at different candidate feed locations may be selectively connected to the radio frequency circuit to adjust the resonant point of the cavity antenna.

[0022] Optionally, the power supply point is a movable contact.

[0023] Optionally, the shielding structure and the product bottom shell form a closed grounding loop along the circumference of the slot.

[0024] This utility model also provides a terminal device, including:

[0025] Radio frequency circuits;

[0026] An antenna, the antenna comprising a cavity antenna assembly as described in any of the preceding claims.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This utility model provides a cavity antenna assembly and electronic device. By utilizing the slot in the device as part of the antenna, it effectively saves the overall space while ensuring that the antenna efficiency of the device meets the standard, thereby satisfying the market's requirements for the product's communication performance.

[0029] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the front orientation of the slot and the layout of the feed point in a cavity antenna assembly provided by an embodiment of this utility model;

[0032] Figure 2 This is a schematic diagram of the back of the slot and the shielding structure in a cavity antenna assembly provided by an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the slot and bottom shell of a cavity antenna assembly provided in this embodiment of the present utility model;

[0034] Figure 4 This is a simulation result of the antenna efficiency of a cavity antenna assembly provided in this embodiment of the present invention;

[0035] Figure 5 This is a simulation result showing the effect of the feed point position on the resonance in a cavity antenna assembly provided by this utility model embodiment.

[0036] Reference numerals: 10, Product bottom shell; 11, Card slot; 12, Shielding structure; 13, Power supply point. Detailed Implementation

[0037] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0038] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0039] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0040] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0041] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0042] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0043] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0044] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] Please refer to Figures 1 to 3 This utility model provides a cavity antenna assembly, including:

[0047] Product bottom shell 10;

[0048] The slot 11 is provided on the bottom shell 10 of the product;

[0049] The shielding structure 12 is disposed on the back of the card slot 11, and the outline of the shielding structure 12 is adapted to the outline of the card slot 11.

[0050] The power supply point 13 is located in the card slot 11 and is electrically connected to the radio frequency circuit;

[0051] The product's bottom shell 10, slot 11, and shielding structure 12 together form a cavity antenna, and the feed point 13 is used to excite the cavity antenna to resonate in a predetermined frequency band.

[0052] like Figure 1 As shown, the front area of ​​the card slot 11 is used to hold a SIM card or memory card, and an antenna feed point 13 is provided inside the card slot 11. The position of the feed point 13 is arranged according to the geometry of the card slot 11 and the surrounding structure, and the optimal position is determined through electromagnetic simulation to ensure that the cavity antenna forms a good resonance in the target frequency band. By reasonably selecting the position of the feed point 13 within the card slot 11, efficient antenna coupling can be achieved by making full use of the limited space.

[0053] In this embodiment, the slot 11 serves as the original structure of the device, with a shielding structure 12 and a power supply point 13 on its back. This utilizes the geometric features of the slot 11 and the metal shielding to form an equivalent resonant cavity. When the power supply point 13 is excited, an electromagnetic field distribution is formed within the cavity, and the resonant point is determined by the cavity's dimensions and boundary conditions.

[0054] Therefore, based on this embodiment, the original space-consuming slot 11 is converted into part of the antenna, thereby saving the space required for an independent antenna and realizing the deployment of multiple antennas in a very small space to meet the needs of multi-frequency communication.

[0055] In some alternative embodiments, the shielding structure 12 includes a grounded metal component and conductive foam electrically connected to the metal component; wherein the aforementioned shielding structure 12 is a continuous structure.

[0056] In this embodiment, the shielding structure 12 adopts a combination of grounded metal parts and conductive foam to form a continuous ground plane, thereby achieving a balance between heat dissipation, structural assembly and antenna performance.

[0057] like Figure 2 and Figure 3 As shown, the back area of ​​the card slot 11 is connected to the metal component via conductive foam, thus forming a continuous shielding surface together with the product's bottom shell 10. This shielding structure 12 seals off the open portion of the back of the card slot 11, creating a closed cavity environment between the card slot 11 and the bottom shell. In this way, the space of the card slot 11 is transformed from its original functional structure into part of the antenna cavity, enhancing the stability of the cavity antenna and suppressing the adverse effects of external electromagnetic interference on antenna performance.

[0058] In some alternative embodiments, the shielding structure 12 includes a plurality of spaced-apart spring tabs. The spaced-apart shielding structure 12 can reduce manufacturing difficulty while ensuring antenna functionality and saving materials.

[0059] In some alternative embodiments, the shielding structure 12 completely encloses the open portion on the back of the slot 11. Since the shielding structure 12 serves as the cavity boundary, its conductivity and continuity directly affect the cavity's resonant quality factor and stability. In this embodiment, the continuous enclosed structure provides a complete cavity boundary, ensuring resonant point stability, thereby effectively improving antenna resonant stability and consistency, while also effectively suppressing external interference and improving signal efficiency.

[0060] In some alternative implementations, the card slot 11 is a SIM card slot or a memory card slot, and the product bottom cover 10 is a battery cover or a back cover.

[0061] Understandably, SIM or memory card slots are standard features in almost all terminals, with relatively fixed positions and close fit to the terminal's frame or back cover. When integrated as part of the antenna cavity, no additional structural components are needed, balancing functionality and antenna placement while achieving low cost and high integration.

[0062] In some alternative implementations, the slot 11 is provided with multiple candidate power supply positions, and the power supply point 13 can be selectively arranged at any of the multiple candidate power supply positions.

[0063] Furthermore, each feed point 13 arranged at different candidate feed positions is selectively connected to the radio frequency circuit to adjust the resonant point of the cavity antenna.

[0064] Furthermore, the power supply point 13 is a movable contact, allowing its position to be adjusted within the lateral range of the card slot 11.

[0065] For example, assuming the horizontal width of the slot 11 is W, the candidate feed point 13 can be arranged within a certain range from the left side of the slot 11, such as 0.35W–0.65W, thereby achieving effective adjustment of the wavelength resonant point.

[0066] In another implementation, different candidate feed points 13 are selectively accessed by a sliding rail or a multi-throw switch array, thereby switching the resonant point in different frequency bands or different communication scenarios.

[0067] Understandably, the position of feed point 13 affects the electric field distribution within the cavity. By adjusting its position, the equivalent electrical length changes, and the resonant point moves accordingly. Utilizing a multi-point candidate or movable structure allows for flexible adaptation to different frequency bands, avoiding the limitations of a single-point fixation. This improves the antenna's frequency band adaptability, meets the communication standards requirements of different regions or models, and reduces the cost of redesigning the antenna.

[0068] In some alternative implementations, the shielding structure 12 and the product bottom shell 10 form a closed grounding loop along the circumference of the slot 11.

[0069] Understandably, a closed grounding loop is equivalent to forming a complete boundary on the outer edge of the cavity, effectively ensuring the continuity of the current loop, reducing parasitic resistance, thereby improving the consistency and stability of the cavity antenna and reducing efficiency loss caused by poor grounding.

[0070] To verify the performance of the prerequisite antenna assembly provided in this embodiment, such as Figure 4 As shown, electromagnetic simulation tests were conducted on the cavity antenna based on slot 11 to obtain its resonant characteristics and radiation efficiency in the WiFi / 5G operating frequency band. The results show that the cavity antenna can form a stable resonant point within the predetermined frequency band, and its radiation efficiency reaches approximately -5.2 dB, meeting the requirements of communication standards.

[0071] Therefore, the cavity formed by the slot 11 and the shielding structure 12 can effectively realize the antenna function and has the ability to maintain high efficiency in a very small space.

[0072] Furthermore, such as Figure 5As shown, by adjusting the placement of the feed point 13 within the slot 11, the equivalent electrical length of the cavity antenna is changed, thereby achieving the resonant point shift. Simulation results show that different positions of the feed point 13 along the transverse direction of the slot 11 correspond to different resonant wavelengths, enabling the antenna to flexibly match different frequency bands according to actual needs. This improves the antenna's adjustability and adaptability, helping to maintain stable signal performance under different communication standards or application scenarios.

[0073] Based on the foregoing embodiments, this utility model also provides a terminal device, including:

[0074] Radio frequency circuits;

[0075] Antenna, including cavity antenna assemblies as described above.

[0076] When the aforementioned cavity antenna assembly is integrated into the terminal device, the antenna structure and the terminal can be integrated, improving the overall space utilization and enabling efficient support of WiFi and 5G multi-band communication within a limited space.

[0077] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this application and utilizing the content described in the text and drawings of this application, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of protection of this utility model.

Claims

1. A cavity antenna assembly, characterized by, include: Product bottom shell; A slot is provided on the bottom shell of the product; A shielding structure is disposed on the back of the card slot, and the outline of the shielding structure is adapted to the outline of the card slot; The power supply point is located in the slot and is electrically connected to an radio frequency circuit; The product's bottom shell, the card slot, and the shielding structure together form a cavity antenna, and the feed point is used to excite the cavity antenna to resonate in a predetermined frequency band.

2. The cavity antenna assembly of claim 1, wherein, The shielding structure includes: Grounded metal parts; Conductive foam electrically connected to the metal component; The shielding structure is a continuous structure.

3. The cavity antenna assembly of claim 2, wherein, The shielding structure and the product bottom shell form a closed grounding loop along the circumference of the slot.

4. The cavity antenna assembly of claim 1, wherein, The shielding structure includes multiple spaced-apart spring clips.

5. The cavity antenna assembly according to claim 1, characterized in that, The shielding structure completely seals off the open portion on the back of the card slot.

6. The cavity antenna assembly of claim 1, wherein, The card slot is a SIM card slot or a memory card slot, and the bottom cover of the product is a battery cover or a back cover.

7. The cavity antenna assembly of claim 1, wherein, The slot has multiple candidate power supply positions, and the power supply point can be selectively located at any of the multiple candidate power supply positions.

8. The cavity antenna assembly of claim 7, wherein, Each of the feed points, located at different candidate feed positions, is selectively connected to the radio frequency circuit to adjust the resonant point of the cavity antenna.

9. The cavity antenna assembly of claim 7 or 8, wherein, The power supply point is a movable contact.

10. A terminal device, characterized in that, include: Radio frequency circuits; The antenna includes a cavity antenna assembly as described in any one of claims 1 to 9.

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