Antenna assembly and electronic device

Abstract

This disclosure provides an antenna assembly and electronic device. The antenna assembly includes a radiating body, antenna lines, and an auxiliary capacitor. The radiating body is electrically connected to the antenna lines to provide power to and ground the radiating body. The radiating body includes a parasitic stub, and the auxiliary capacitor is disposed in a coupling region surrounding the parasitic stub to adjust the resonant frequency of the parasitic stub. By placing the auxiliary capacitor in the coupling region of the parasitic stub of the radiating body, the resonant frequency of the parasitic stub is adjusted through the coupling between the auxiliary capacitor and the parasitic stub, thereby obtaining the desired antenna radiation frequency. The auxiliary capacitor reduces the structural and space requirements of the antenna assembly and the electronic device using the antenna assembly, improving antenna efficiency and user experience.

Description

Technical Field

[0001] This disclosure relates to the field of antenna technology, and in particular to antenna assemblies and electronic devices. Background Technology

[0002] With the commercialization of 5G and the development of 6G research, electronic device antennas need to support more and more operating frequency bands, and the corresponding antenna architectures are becoming more compact. How to achieve high-performance antenna design in a limited space has become a research hotspot in the field.

[0003] In related technologies, adding parasitic stubs to antennas can achieve electroparasitism or magnetic parasitism, and changing the length of the parasitic stubs can adjust the parasitic resonance. However, for low-frequency antennas, the realization of low-frequency parasitism has high requirements on the length of the parasitic stubs, which is difficult to achieve in a limited space. Utility Model Content

[0004] This disclosure provides an antenna assembly and electronic device to solve related technical problems.

[0005] According to a first aspect of this disclosure, an antenna assembly is provided, comprising: a radiating body, an antenna circuit, and an auxiliary capacitor;

[0006] The radiating element is electrically connected to the antenna circuit to enable power feeding and grounding of the radiating element;

[0007] The radiating body includes a parasitic branch; the auxiliary capacitor is disposed in the coupling region surrounding the parasitic branch to adjust the resonant frequency of the parasitic branch.

[0008] Optionally, the antenna assembly is used in an electronic device, the electronic device including a frame and a middle plate, the middle plate being located within the space enclosed by the frame; the parasitic branch is formed on the frame, and the auxiliary capacitor is electrically connected to the metal portion of the middle plate.

[0009] Optionally, the middle plate has a recess formed in the thickness direction of the electronic device, the recess being located in the coupling region, and at least a portion of the auxiliary capacitor is assembled within the recess.

[0010] Optionally, at least a portion of the auxiliary capacitor protrudes from the recess.

[0011] Optionally, the middle plate includes a plastic portion, and the recess is formed in the plastic portion.

[0012] Optionally, the metal portion is located at the bottom of the recess and protrudes outside the plastic portion.

[0013] Optionally, the auxiliary capacitor may include a distributed capacitor.

[0014] Optionally, the distributed capacitor includes a pair of pads arranged opposite each other, and the parasitic stub and the pair of pads are arranged side by side.

[0015] Optionally, the distributed capacitor includes a pair of pads arranged opposite each other, the distribution direction of the pair of pads being perpendicular to the extension direction of the parasitic branch.

[0016] According to a second aspect of this disclosure, an electronic device is provided, the electronic device including any of the antenna components described in the first aspect.

[0017] The technical solution provided in this disclosure can achieve at least the following beneficial effects:

[0018] This disclosure achieves the desired antenna radiation frequency by placing an auxiliary capacitor within the coupling region of the parasitic stub of the radiating element, thereby adjusting the resonant frequency of the parasitic stub through coupling between the auxiliary capacitor and the stub. The auxiliary capacitor reduces the structural and space requirements of the antenna assembly and the electronic equipment using it, improving antenna efficiency and user experience.

[0019] 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 specification. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0021] Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure;

[0022] Figure 2 This is a comparison chart of antenna efficiency in an exemplary embodiment of this disclosure.

[0023] Figure label:

[0024] Antenna assembly 1;

[0025] Radiation body 11; parasitic branch 111; auxiliary capacitor 12;

[0026] Electronic device 2; frame 21; middle plate 22; recess 221. Detailed Implementation

[0027] The technical solutions in the embodiments (or "implementations") of this disclosure will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] If this disclosure uses terms relating to directional indications or positional relationships (e.g., up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, terms such as "first" and "second" in this disclosure are used only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0029] With the commercialization of 5G and the development of 6G research, electronic device antennas need to support an increasing number of operating frequency bands, leading to increasingly compact antenna architectures. Achieving high-performance antenna design within limited space has become a hot research topic. In related technologies, adding parasitic stubs to antennas can achieve electroparasitism or magnetic parasitism, and changing the length of the parasitic stubs can adjust the parasitic resonance. However, for low-frequency antennas, achieving low-frequency parasitism places high demands on the length of the parasitic stubs, which is difficult to achieve within limited space.

[0030] This disclosure provides an antenna assembly. Figure 1 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment of this disclosure, as shown below. Figure 1 As shown, the antenna assembly 1 includes a radiating body 11, antenna lines, and an auxiliary capacitor 12. The radiating body 11 is electrically connected to the antenna lines to provide power and grounding for the radiating body 11. The radiating body 11 includes a parasitic stub 111, and the auxiliary capacitor 12 is disposed in the coupling region surrounding the parasitic stub 111 to adjust the resonant frequency of the parasitic stub 111.

[0031] In the above embodiment, by providing an auxiliary capacitor 12 within the coupling region of the parasitic branch 111 of the radiating body 11, the resonant frequency of the parasitic branch 111 is adjusted through the coupling between the auxiliary capacitor 12 and the parasitic branch 111, thereby obtaining the desired antenna radiation frequency. The auxiliary capacitor 12 reduces the structural and space requirements of the antenna assembly 1 and the electronic device 2 using the antenna assembly 1, improving antenna efficiency and user experience.

[0032] It should be noted that the parasitic stub 111 is a radiating or coupling structure in the antenna radiating body 11 that is not directly connected to the feed point. Through electromagnetic coupling with the main radiator, such as the antenna monopole or the feed stub, it extends the antenna's operating frequency band or optimizes its radiation performance. For example, when the radiating body 11 is formed on the frame 21 of the electronic device 2, the parasitic stub 111 can be the part between the gap in the frame 21 and a ground connection point.

[0033] The antenna assembly 1 described above can be applied to an electronic device 2, which may be a mobile phone, tablet computer, vehicle terminal, medical terminal, etc., and this disclosure does not impose any limitations on it. The following is an illustrative example of the application of the antenna assembly 1 to a mobile phone.

[0034] In some embodiments, the electronic device 2 includes a frame 21 and a middle plate 22. The middle plate 22 is located within the space enclosed by the frame 21. A parasitic branch 111 is formed on the frame 21, and an auxiliary capacitor 12 is electrically connected to the metal portion of the middle plate 22. In this embodiment, the frame 21 of the electronic device 2 can serve as a radiating body 11, the parasitic branch 111 is a segment on the frame 21, and the auxiliary capacitor 12 is located in the coupling region on one side of the parasitic branch 111. Conductively connecting the auxiliary capacitor 12 to the metal portion of the middle plate 22 enables control of the auxiliary capacitor 12 and reduces the difficulty of installing and using the auxiliary capacitor 12.

[0035] In the above embodiments, the middle plate 22 may have a recess 221 formed in the thickness direction of the electronic device 2. The recess 221 is located in the coupling region, and at least a portion of the auxiliary capacitor 12 is assembled within the recess 221, which can reduce the space occupied by the auxiliary capacitor 12 in the electronic device 2. Specifically, the auxiliary capacitor 12 can be completely housed within the recess 221 to avoid additional space occupation caused by the structure protruding from the recess 221. Alternatively, in some embodiments, at least a portion of the auxiliary capacitor 12 can protrude from the recess 221 to avoid interference of the middle plate 22 structure with the auxiliary capacitor 12 and improve the coupling effect between the auxiliary capacitor 12 and the parasitic branch 111.

[0036] In some embodiments, the middle plate 22 includes a plastic portion, and a recess 221 is formed in the plastic portion. In this embodiment, the recess 221 can be the original structure of the plastic portion of the middle plate 22. Utilizing the original structure of the middle plate 22 to assemble the auxiliary capacitor 12 can reduce the structural modifications required for the antenna assembly 1 and the electronic device 2, thereby reducing the difficulty of modifying the antenna assembly 1.

[0037] In the above embodiment, the metal portion can be located at the bottom of the recess 221 and exposed outside the plastic portion. When the auxiliary capacitor 12 is assembled in the recess 221, it can be electrically connected to the metal portion located at the bottom of the recess 221, reducing the difficulty of conductive connection and improving the convenience of setting the auxiliary capacitor 12.

[0038] The middle plate 22 structure of the electronic device 2 may include a plastic part and a metal part. The metal part may be partially covered inside the plastic part and partially exposed outside the plastic part to enhance the structural strength of the middle plate 22 structure.

[0039] In some embodiments, the auxiliary capacitor 12 can be a distributed capacitor, which simplifies the structural setup of the antenna assembly 1, reduces power consumption and cost, and improves antenna performance and design flexibility.

[0040] For example, a distributed capacitor may include a pair of pads arranged opposite each other, a parasitic branch 111, a pair of pads arranged side by side, and the pads being welded and fixed to the metal part of the middle plate 22. Figure 1 The dashed arrow in the middle can represent the arrangement direction of the pads. With the help of the parasitic branch 111 and the side-by-side distribution of a pair of pads, a matching positional relationship can be formed with the metal part of the middle plate 22 extending along the above-mentioned side-by-side direction, thereby improving the connection convenience between the distributed capacitor and the metal part.

[0041] Alternatively, the distributed capacitor includes a pair of oppositely arranged pads, the distribution direction of which is perpendicular to the extension direction of the parasitic branch 111. By utilizing the side-by-side distribution of the parasitic branch 111 and the pair of pads, a matching positional relationship can be formed with the metal portion of the middle plate 22 extending perpendicular to the aforementioned side-by-side direction, improving the ease of connection between the distributed capacitor and the metal portion.

[0042] In other embodiments, the auxiliary capacitor 12 may also be a surface mount capacitor or other types of capacitor, and this disclosure does not limit this.

[0043] In other embodiments, the exposed position of the metal portion of the middle plate 22 relative to the plastic portion can be adjusted so that the exposed position of the metal portion matches the setting position of the auxiliary capacitor 12, which helps to optimize the setting position of the auxiliary capacitor 12.

[0044] Adjusting the capacitance value of the auxiliary capacitor 12 can change the coupling effect between the auxiliary capacitor 12 and the parasitic stub 111, thereby changing the resonant frequency of the parasitic stub 111. By setting the auxiliary capacitor 12 without increasing the length of the parasitic stub 111, the resonant frequency of the parasitic stub 111 is lowered, solving the bottleneck problem in low-frequency antenna parasitic design and enabling the antenna to achieve superior performance.

[0045] For example Figure 2 As shown, S1 can be the antenna efficiency curve without auxiliary capacitor 12, and S2 can be the antenna efficiency curve with auxiliary capacitor 12. The initial resonance of the antenna's parasitic stub 111 is around 960MHz. By loading a 1.2pF distributed capacitor in the plastic recess 221 on the mid-frame, the parasitic resonance frequency is lowered, achieving a significant improvement in passive efficiency within the target frequency band. Furthermore, the parasitic resonance of the antenna can be flexibly adjusted by changing the value of the distributed capacitor. The above scheme is simple to operate and highly flexible, possessing high practical value.

[0046] This disclosure further provides an electronic device 2, which includes the antenna assembly 1 described above.

[0047] By placing an auxiliary capacitor 12 within the coupling region of the parasitic stub 111 of the radiating body 11, the resonant frequency of the parasitic stub 111 is adjusted through the coupling between the auxiliary capacitor 12 and the parasitic stub 111, thereby obtaining the desired antenna radiation frequency. The auxiliary capacitor 12 reduces the structural and space requirements of the antenna assembly 1 and the electronic device 2 using the antenna assembly 1, improving antenna efficiency and user experience.

[0048] The aforementioned electronic device 2 may be a mobile phone, tablet computer, vehicle terminal, medical terminal, etc., and this disclosure does not impose any restrictions on it.

[0049] It should be noted that the technical solutions or features described in the above embodiments can be combined or complemented by each other without conflict. The scope of protection of this disclosure is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An antenna assembly, characterized in that, include: Radiation body (11), antenna circuit and auxiliary capacitor (12); The radiating body (11) is electrically connected to the antenna line to achieve power feeding and grounding of the radiating body (11); The radiating body (11) includes a parasitic branch (111); the auxiliary capacitor (12) is disposed in the coupling area around the parasitic branch (111) to adjust the resonant frequency of the parasitic branch (111).

2. The antenna assembly of claim 1, wherein, The antenna assembly (1) is applied to an electronic device (2), which includes a frame (21) and a middle plate (22). The middle plate (22) is located within the space enclosed by the frame (21). The parasitic branch (111) is formed on the frame (21), and the auxiliary capacitor (12) is electrically connected to the metal part of the middle plate (22).

3. The antenna assembly of claim 2, wherein, The middle plate (22) is provided with a recess (221) formed in the thickness direction of the electronic device (2), the recess (221) is located in the coupling region, and at least a portion of the auxiliary capacitor (12) is assembled in the recess (221).

4. The antenna assembly of claim 3, wherein, At least a portion of the auxiliary capacitor (12) protrudes from the recess (221).

5. The antenna assembly of claim 3, wherein, The middle plate (22) includes a plastic portion, and the recess (221) is formed in the plastic portion.

6. The antenna assembly of claim 5, wherein, The metal portion is located at the bottom of the recess (221) and protrudes from the outside of the plastic portion.

7. The antenna assembly of claim 1, wherein, The auxiliary capacitor (12) includes distributed capacitors.

8. The antenna assembly of claim 7, wherein, The distributed capacitor includes a pair of pads arranged opposite each other, and the parasitic branch (111) and the pair of pads are arranged side by side.

9. The antenna assembly of claim 7, wherein, The distributed capacitor includes a pair of pads arranged opposite each other, the distribution direction of the pair of pads being perpendicular to the extension direction of the parasitic branch (111).

10. An electronic device, comprising: Includes the antenna assembly (1) as described in any one of claims 1-9.

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