Antenna assembly and electronic device

Abstract

The present disclosure relates to the technical field of antennas, and provides an antenna assembly and an electronic device. The antenna assembly comprises a base, a cover and an antenna body. The base is provided with an antenna mainboard, and the antenna mainboard is provided with a protruding electrical connection head. The cover is detachably covered on the base. The antenna body is arranged on the side of the cover facing the base, and the side of the antenna body facing the base is formed with an electrical connection part. In the working condition that the cover is covered on the base, the electrical connection part is in abutment with the electrical connection head in correspondence, so as to electrically connect the antenna body and the antenna mainboard. The electronic device comprises the antenna assembly, and both have the beneficial effects of realizing flexible installation of the antenna, adapting to compact installation space, and facilitating subsequent replacement and upgrading of the antenna frequency band.

Description

Technical Field

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

[0002] With the increasing popularity of smart wearable electronic devices (such as smartwatches and smart bands), the design shortcomings of antennas in smart wearable devices have become more and more obvious. Due to the small size of smart wearable devices, the antennas are generally fixed in a small space inside the device. The installation of antennas is also quite restricted and troublesome. Moreover, once the antenna is installed in a smart wearable device, it is difficult to replace or upgrade it according to usage needs. Summary of the Invention

[0003] This disclosure provides an antenna assembly and electronic device to address the problems of poor installation flexibility and difficulty in subsequent replacement and upgrade of antennas in smart wearable devices in the related art.

[0004] The antenna assembly provided in this disclosure includes a base, a cover, and an antenna body; The substrate contains an antenna main board, and the antenna main board contains a protruding power connector. The cover is detachably fitted onto the base; The antenna body is disposed on the side of the cover facing the base, and a power receiving part is formed on the side of the antenna body facing the base; When the cover is closed on the base, the power receiving part and the power receiving head are in corresponding contact, and the antenna body is electrically connected to the antenna main board.

[0005] In one embodiment, the cover includes a cover edge circumferentially disposed around its periphery; The antenna body includes a branch portion located on its periphery, and the branch portion is abutted and fixed to the inner wall along the edge of the cover.

[0006] In one embodiment, the antenna body further includes a coupling portion located on its periphery; The coupling part is disposed on the outer wall of the cover edge and is disposed corresponding to the branch part along the thickness direction of the cover edge; The coupling portion can form a controlled coupling channel with the branch portion to couple and adjust the energy radiation direction of the branch portion.

[0007] In one embodiment, the coupling portion includes a first coupling branch, a second coupling branch, and a third coupling branch; The first coupling branch extends along a first direction; The second coupling branch is perpendicularly connected to both ends of the first coupling branch; The third coupling branch is vertically connected to both ends of the second coupling branch and is arranged parallel to and spaced apart from the first coupling branch.

[0008] In one embodiment, the coupling portion is made of a single-cell material and is embedded in the outer wall of the cover.

[0009] In one embodiment, the branch portion includes a spiral branch; The spiral branches are either planar spirals or three-dimensional spirals.

[0010] In one possible embodiment, the connector has an elastic telescopic section; When the contact part abuts against the contact head, the elastic telescopic section is compressed and elastically contracts accordingly.

[0011] In one embodiment, a barb hook head is provided on the periphery of the base and the cover, and a hook-receiving groove is provided on the other. When the cover is closed on the base, the barbed hook head is correspondingly hooked and installed in the hooked slot.

[0012] In addition, this disclosure also provides an electronic device, which includes a device body and the antenna assembly described above; The substrate serves as the bottom shell of the device body, and the cover serves as the top shell of the device body.

[0013] In one embodiment, the cover also has a perforated window portion, and a display screen is correspondingly filled in the window portion.

[0014] The technical solution provided in this disclosure has the following advantages compared with related technologies: The antenna assembly provided in this embodiment separates the antenna body and the antenna main board into the cover and the base, and ensures electrical connection between the antenna body and the antenna main board by the corresponding contact of the contact part and the contact head when the cover is closed with the base. This antenna assembly has the advantages of flexible and convenient installation, very suitable for compact installation space, and easy to replace and upgrade the antenna frequency band in the future.

[0015] In addition, the electronic device provided in this embodiment includes the above-described antenna assembly, which can also achieve the beneficial effects of the antenna assembly, and will not be described in detail here.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 An exploded view of the antenna assembly provided in an embodiment of this disclosure is shown; Figure 2 An exploded view of the antenna assembly provided in an embodiment of this disclosure is shown from another perspective; Figure 3 A schematic diagram of the coupling section in the antenna assembly provided in this embodiment is shown; Figure 4 A schematic diagram of an electronic device provided in an embodiment of this disclosure is shown.

[0019] The labels in the diagram are as follows: 1. Substrate; 11. Antenna mainboard; 111. Connector; 12. Hook and clip slot; 2. Cover; 21. Cover edge; 22. Barbed clip; 23. Window section; 231. Display screen; 3. Antenna body; 31. Power connection part; 32. Stub part; 33. Coupler part; 331. First coupling stub; 332. Second coupling stub; 333. Third coupling stub. Detailed Implementation

[0020] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0022] Combination Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides an antenna assembly, which includes a base 1, a cover 2, and an antenna body 3; an antenna main board 11 is disposed in the base 1, and a protruding contact head 111 is disposed in the antenna main board 11; the cover 2 is detachably fitted onto the base 1; the antenna body 3 is disposed on the side of the cover 2 facing the base 1, and a contact portion 31 is formed on the side of the antenna body 3 facing the base 1; wherein, when the cover 2 is fitted onto the base 1, the contact portion 31 and the contact head 111 are correspondingly abutted, and the antenna body 3 is electrically connected to the antenna main board.

[0023] The antenna assembly provided in this disclosure can be used in various smart wearable electronic devices, such as smartwatches, smart bracelets, and smart wristbands. Since the antenna assembly includes a detachably connected base 1 and a cover 2, and the antenna mainboard 11 is separately disposed in the base 1, while the antenna body 3 is correspondingly disposed on the side of the cover 2 facing the base 1, and when the cover 2 is closed to the base 1, the contact portion 31 in the antenna body 3 can also abut against the contact head 111 in the antenna mainboard 11 to achieve electrical connection between the antenna body 3 and the antenna mainboard.

[0024] When the antenna assembly provided in this embodiment is installed in a miniaturized smart wearable electronic device, the separately configured antenna motherboard 11 and antenna body 3 can be more flexibly adjusted in terms of installation position, so that the appearance, mechanism and electromagnetic function are coordinated with each other. Without sacrificing mechanical strength and appearance integrity, it takes into account electromagnetic performance and durability, and greatly improves installation flexibility.

[0025] Furthermore, when it is necessary to replace or upgrade the frequency band of the antenna body 3, the antenna body 3 can be removed from the base 1 along with the cover 2, and only the antenna body 3 needs to be replaced or upgraded. There is no need to disassemble or replace the antenna motherboard 11, which effectively solves the problem of subsequent replacement and upgrade of antennas in smart wearable electronic devices in related technologies.

[0026] In summary, the antenna assembly provided in this embodiment cleverly separates the antenna body 3 and the antenna main board 11 into the cover 2 and the base 1. When the cover 2 is closed on the base 1, the electrical connection between the antenna body 3 and the antenna main board 11 is ensured by the corresponding contact of the power receiving part 31 and the power receiving head 111. This assembly has the advantages of flexible and convenient installation, excellent fit for compact installation space, and ease of subsequent replacement and upgrading of the antenna frequency band.

[0027] In one embodiment, the cover 2 includes a cover edge 21 surrounding its periphery; the antenna body 3 includes a branch portion 32 located on its periphery, and the branch portion 32 is abutted and fixed to the inner wall of the cover edge 21.

[0028] Specifically, in combination Figure 1 To elaborate further, the cover edge 21 around the cover 2 can be configured perpendicular to the plane of the cover 2, and the branch portion 32 of the antenna body 3 can also be configured perpendicular to the plane of the antenna body 3. This allows the branch portion 32 to be fixed to the inner wall of the cover edge 21 in a parallel abutting manner. This design allows the branch portion 32 to occupy less space inside the cover 2, while also providing support and protection for the branch portion 32 against the inner wall through the cover edge 21, preventing displacement or deformation damage caused by external impacts.

[0029] Furthermore, since the stub 32 in the antenna body 3 can have a planar structure of a certain thickness or a three-dimensional structure, a recessed mounting part can be provided on the inner wall of the cover along the 21, and the shape and size of the mounting part can be adapted to the stub 32. In this way, the stub 32 can be fixed to the inner wall of the cover along the 21 by flush mounting, further reducing the space occupied by the stub 32 and further improving the installation firmness of the stub 32.

[0030] In addition, to avoid the interference of the cover 2 on the signal strength of the antenna 3, the cover 2 can be made of PC (Polycarbonate) and ABS (Acrylonitrile–Butadiene–Styrene copolymer) materials to avoid the cover 2 causing a decrease in the gain and deterioration of the signal of the antenna 3.

[0031] Furthermore, to further explain the requirements, in order to increase the frequency bandwidth of the antenna body 3, multiple branches 32 can be set around the antenna body 3, such as two, three, or four, and all branches 32 can be installed and fixed by abutting against the inner wall of the cover 21.

[0032] In one embodiment, the antenna body 3 further includes a coupling portion 33 located on its periphery; the coupling portion 33 is disposed on the outer wall of the cover along the 21 and is disposed corresponding to the stub portion 32 along the thickness direction of the cover along the 21; wherein, the coupling portion 33 can form a controlled coupling channel with the stub portion 32 to couple and adjust the energy radiation direction of the stub portion 32.

[0033] Specifically, in combination Figure 2 To explain in further detail, the coupling part 33 of the antenna body 3 can also be configured to be perpendicular to the plane where the antenna body 3 is located. In this way, the coupling part 33 can be fixed to the outer wall of the cover along the 21 in a parallel abutting manner. Since the coupling part 33 and the branch part 32 are arranged corresponding to each other in the thickness direction of the cover along the 21, the coupling part 33 can form a controlled coupling channel with the branch part 32 to couple and adjust the energy radiation direction of the branch part 32.

[0034] Because the antennas in smart wearable electronic devices are extremely close to the human body, they are prone to excessively high specific absorption rates (SAR). Therefore, the antenna assembly provided in this embodiment cleverly incorporates a coupling portion 33 on the outer wall of the cover along the 21. By adjusting the lateral and longitudinal dimensions of the coupling portion 33, the surface current is redistributed. This causes the coupling channel to guide the radiated energy of the antenna body 3 towards the non-human side, reducing the radiated field strength in the direction of the head or wrist.

[0035] By setting the transverse current direction in the coupling section 33 to be opposite to that in the branch section 32, a reverse interference region with a phase of approximately 180°±15° can be generated, thereby forming a "low electric field region" or "zero gain valley" on the human body side, thus suppressing near-field energy leakage of the branch section 32.

[0036] The distance between the coupling part 33 and the antenna body 3 can be 0.5 mm to 1.5 mm to achieve optimal coupling strength. The core design principle of the improved coupling part 33 and the electric field interference theory lies in the fact that, through the reverse current interference between the antenna body 3 and the coupling part 33, an anti-phase superposition region is formed in the direction of the human body, thereby significantly reducing the near-field electric field strength. Its energy distribution ratio can be approximately described by the following formula: E user / E0≈1-2kcos (Δφ); Where k is the coupling coefficient and Δφ is the phase difference between the two currents. When Δφ≈180°, the energy of the two fields cancels each other out after superposition, achieving the maximum SAR suppression effect. Experimental and simulation results show that the coupling unit 33 can reduce the SAR peak value by 1.0dB to 1.5dB, which meets the international standard (1 g / 10g SAR≤1.6 W / kg).

[0037] Furthermore, the aforementioned coupling part 33 can also be fixedly attached to the outer wall of the cover edge 21 in a flush and embedded manner, and a protective layer can be further coated on the outer wall of the cover edge 21 to prevent the coupling part 33 from being damaged by bumps.

[0038] The specific arrangement of the coupling part 33 described above can redistribute the near-field energy density of the antenna body 3 without increasing the overall volume of the cover 2, effectively reducing the absorbed power on the human side, while maintaining the main lobe gain and overall radiation efficiency. It is particularly suitable for high-density near-field environments such as smartwatches and AR / VR devices.

[0039] In one embodiment, the coupling portion 33 includes a first coupling branch 331, a second coupling branch 332, and a third coupling branch 333; the first coupling branch 331 extends along a first direction; the second coupling branch 332 is perpendicularly connected to both ends of the first coupling branch 331; the third coupling branch 333 is perpendicularly connected to both ends of the second coupling branch 332 and is arranged parallel to and spaced apart from the first coupling branch 331.

[0040] Specifically, in combination Figure 3To explain in further detail, the first coupling branch 331 in the coupling part 33 can be specifically arranged to extend laterally along the coupling part 33 (i.e., the first direction is laterally), so that the first coupling branch 331 can be used to conduct lateral current; the two second coupling branches 332 in the coupling part 33 are respectively arranged to extend longitudinally along the coupling part 33, used to conduct longitudinal current, and can be connected with the first coupling branch 331 to form an "H" shaped field-type guiding structure; the four third coupling branches 333 in the coupling part 33 can be specifically arranged in a "two-to-two facing each other" manner along the lateral side of the coupling part 33, with the ends of the second coupling branches 332 facing each other.

[0041] In one embodiment, the coupling portion 33 is made of a single-cell material and is embedded in the outer wall of the cover along the edge 21.

[0042] Specifically, the coupling part 33 is made of a single-cell material, such as LC cell material. Unlike traditional metamaterials that require large-area arrays, a single LC cell can produce a significant field distribution modulation effect. At the resonant frequency f0, the equivalent permeability μ_eff of this cell is negative (μ_eff<0), forming an equivalent "magnetic reflection wall" between the antenna 3 and the human body. This causes an anti-phase delay in energy flow, resulting in the reflection of part of the electromagnetic field and blocking energy transfer to the human body. Furthermore, by precisely controlling the gap width, ring diameter, and metal thickness of the coupling part 33, the resonant characteristics of the LC cell can be finely adjusted to achieve the optimal field redistribution effect in the target frequency band (e.g., 2.4 GHz, 5 GHz).

[0043] In one embodiment, the branch portion 32 includes a spiral branch; the spiral branch is planar spiral or three-dimensional spiral.

[0044] Specifically, in combination Figure 1 To elaborate further, the stub 32 can be configured as an Archimedean linear planar spiral or a three-dimensional spiral. In this way, the stub 32 can be designed with adjustable number of turns (N), inner radius (r0), and outer radius (D), allowing the antenna body 3 to quickly adapt to different standards and frequency bands.

[0045] The planar or three-dimensional spiral stub 32, with 1.5 to 3 turns, can balance broadband and circular polarization characteristics. Due to the continuous and gradual phase change within the spiral structure, right-hand and left-hand circular polarization components are generated, resulting in a smooth radiation pattern and uniform gain distribution, effectively suppressing multipath fading in close-range environments. Furthermore, to improve matching and bandwidth, the ends of the spiral stub can be designed with stepped linewidth or stepped spacing, or with parasitic arm compensation, improving VSWR and extending the operating frequency band to a broadband range of 1 GHz to 30 GHz.

[0046] In one embodiment, the connector 111 has an elastic telescopic section; when the connector 31 abuts against the connector 111, the elastic telescopic section is compressed and elastically contracts accordingly.

[0047] Specifically, the elastic telescopic section in the connector 111 can be designed as a spring-loaded telescopic pin or a spring-loaded sheet, and the end of the connector 111 facing the contact part 31 can be configured for multi-point contact. This ensures stable and reliable point contact when the contact part 31 comes into contact with the connector 111. Furthermore, the elastic telescopic section can flexibly adjust the actual protrusion height of the connector 111 through its own elastic expansion and contraction, ensuring an appropriate amount of contact pressure is formed between the connector 111 and the contact part 31.

[0048] In one embodiment, a barb hook head 22 is provided on the periphery of the base 1 and the cover 2, and a hook receiving groove 12 is provided on the other. When the cover 2 is closed on the base 1, the barb hook head 22 is hooked and attached to the hook receiving groove 12.

[0049] Specifically, in combination Figure 1 To explain in more detail, a barb hook head 22 can be provided on each of the opposite sides of the periphery of the cover body 2, and a hook groove 12 can be provided on each of the opposite sides of the periphery of the base body 1. In this way, when the cover body 2 is closed on the base body 1, the two barb hook heads 22 can be hooked and locked into the two hook grooves 12, which fully ensures the stability of the cover body 2 and the base body 1.

[0050] In addition, this disclosure also provides an electronic device, which includes a device body and the antenna assembly described above; wherein, the base 1 serves as the bottom shell of the device body, and the cover 2 serves as the cover shell of the device body.

[0051] Specifically, in combination Figure 4 To elaborate further, the electronic device can be, but is not limited to, a smartwatch, a smart bracelet, or a smart wristband. Since the electronic device includes the aforementioned antenna assembly, it can also achieve all the beneficial effects of the aforementioned antenna assembly, which will not be elaborated further here.

[0052] In one embodiment, the cover 2 also has a window 23 that is hollowed out, and a display screen 231 is correspondingly filled in the window 23.

[0053] Specifically, in combination Figure 4To elaborate further, a window 23 can be cut out at the center of the cover 2, and a display screen 231 can be installed in the window 23, so that the electronic device can display relevant information to the user through the display screen 231. In addition, the antenna body 3 in the antenna assembly can also be mounted to the back side (non-display side) of the display screen 231, further making full use of the internal space of the cover 2.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An antenna assembly, characterized in that, include: The substrate (1) is provided with an antenna main board (11) and the antenna main board (11) is provided with a protruding power connector (111). The cover (2) is detachably fitted onto the base (1); The antenna body (3) is disposed on the side of the cover (2) facing the base (1), and a power receiving part (31) is formed on the side of the antenna body (3) facing the base (1). When the cover (2) is covered by the base (1), the power receiving part (31) and the power receiving head (111) are in corresponding contact, and the antenna body (3) is electrically connected to the antenna main board.

2. The antenna assembly according to claim 1, characterized in that, The cover (2) includes a cover edge (21) surrounding its own periphery; The antenna body (3) includes a branch portion (32) located on its periphery, and the branch portion (32) is abutted and fixed to the inner wall of the cover edge (21).

3. The antenna assembly according to claim 2, characterized in that, The antenna body (3) also includes a coupling part (33) located on its periphery; The coupling part (33) is disposed on the outer wall of the cover edge (21) and is disposed corresponding to the branch part (32) along the thickness direction of the cover edge (21); The coupling part (33) can form a controlled coupling channel with the branch part (32) to couple and adjust the energy radiation direction of the branch part (32).

4. The antenna assembly according to claim 3, characterized in that, The coupling part (33) includes: The first coupling branch (331) is provided to extend along the first direction; The second coupling branch (332) is vertically connected to both ends of the first coupling branch (331); The third coupling branch (333) is vertically connected to both ends of the second coupling branch (332) and is arranged parallel to and spaced apart from the first coupling branch (331).

5. The antenna assembly according to claim 3, characterized in that, The coupling part (33) is made of single-cell material and is embedded in the outer wall of the cover along (21).

6. The antenna assembly according to claim 2, characterized in that, The branch section (32) includes spiral branches; The spiral branches are either planar spirals or three-dimensional spirals.

7. The antenna assembly according to any one of claims 1 to 6, characterized in that, The connector (111) has an elastic telescopic section; When the electrical contact part (31) abuts against the electrical contact head (111), the elastic telescopic section is compressed and elastically contracts accordingly.

8. The antenna assembly according to claim 7, characterized in that, Around the base (1) and the cover (2), one is provided with a barbed hook head (22) and the other is provided with a hook groove (12). When the cover (2) is closed on the base (1), the barbed hook head (22) is hooked and attached to the hooked slot (12).

9. An electronic device, characterized in that, Includes the device body and the antenna assembly according to any one of claims 1 to 8; The base (1) serves as the bottom shell of the device body, and the cover (2) serves as the cover shell of the device body.

10. The electronic device according to claim 9, characterized in that, The cover (2) also has a window (23) that is hollowed out, and a display screen (231) is correspondingly filled in the window (23).

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