Antenna device and wireless communication device
The antenna device designed with a nested structure of a central dipole and a ring dipole solves the problem of large size of existing antenna devices, achieving miniaturization and performance optimization, and improving signal stability and communication efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN H&T INTELLIGENT CONTROL
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-10
Smart Images
Figure CN224481211U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of antenna technology, and in particular to an antenna device and a wireless communication device. Background Technology
[0002] With the development of wireless technology in smart products, smart electronic terminals, smart furniture, and other products can communicate with external devices via antennas through Bluetooth, Wi-Fi, and other technologies. Currently, most existing antennas need to operate in the range of 2.4GHz to 2.5GHz and / or 5.15GHz to 5.85GHz, and their antenna structures occupy a large volume, which cannot meet the miniaturization needs of smart products. Utility Model Content
[0003] This application provides an antenna device and a wireless communication device, which can optimize the structural design of the antenna device, reduce the size of the antenna device, and meet the needs of product miniaturization.
[0004] In a first aspect, this application provides an antenna device, including a center element, a ring element, and a feed line. The center element has a first feed point. The ring elements are spaced around the periphery of the center element and have a second feed point. The feed line includes a first conductor and a second conductor. A first end of the first conductor is electrically connected to the first feed point, and a first end of the second conductor is electrically connected to the second feed point. The second ends of both the first and second conductors are used to connect to an external radio frequency port.
[0005] In some embodiments, the central oscillator includes a main body, a first branch and a second branch. The main body is provided with a first feed point. The first branch and the second branch are respectively disposed on both sides of the main body in a first direction. The central oscillator has an axisymmetric structure. The axis of symmetry of the central oscillator extends along a second direction. The first direction is perpendicular to the second direction.
[0006] In some embodiments, both the first branch and the second branch extend along a first direction.
[0007] In some embodiments, the ring oscillator has a rectangular ring structure.
[0008] In some embodiments, the antenna device further includes a substrate, with a central element and a ring element disposed on the same side of the substrate.
[0009] In some embodiments, the bandwidth of the antenna device is 5.15 GHz to 5.85 GHz; and / or, the center frequency F1 of the central vibrator is 5.5 GHz; and / or, the center frequency F2 of the ring vibrator is 5.5 GHz.
[0010] In some embodiments, the antenna device satisfies at least one of the following conditions: (1) along the first direction, the length L1 of the center element satisfies: 13.5mm≤L1≤18.7mm; (2) along the second direction, the length L2 of the center element satisfies: 6mm≤L2≤12.5mm; (3) along the first direction, the length L3 of the ring element satisfies: 24mm≤L3≤30mm; (4) along the second direction, the length L4 of the ring element satisfies: 18mm≤L4≤26mm; (5) the ring width length L5 of the ring element satisfies: 2mm≤L5≤3mm; (6) along the third direction, the thickness H1 of the center element satisfies: 0.2mm≤H1≤1mm; (7) along the third direction, the thickness H2 of the ring element satisfies: 0.2mm≤H2≤1mm; (8) the feed line includes a coaxial cable, and the diameter D of the coaxial cable satisfies: 0.8mm≤D≤2mm.
[0011] In some embodiments, the first feed point is a positive feed point and the second feed point is a negative feed point.
[0012] Secondly, this application provides a wireless communication device, including a housing and an antenna device, wherein the antenna device is disposed on the inner sidewall of the housing.
[0013] In some embodiments, a clearance area is provided on the outside of the antenna device, and the length L6 of the clearance area satisfies: L6≥10mm.
[0014] The beneficial effects of the embodiments of this application are: the antenna device of this application designs the two vibrators into a nested structure, that is, the ring vibrator surrounds the outside of the central vibrator, and the first conductor and the second conductor of the feed line are respectively connected to the first feed point and the second feed point. In this way, the overall size of the antenna device can be reduced without affecting the performance of the antenna, so that the antenna device can be installed inside the product to meet the miniaturization requirements of the product. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0016] Figure 1 This is a schematic diagram of the antenna device according to an embodiment of this application;
[0017] Figure 2 This is a schematic diagram of the antenna device according to an embodiment of this application, omitting the feed line;
[0018] Figure 3 This is a schematic diagram of an antenna device according to another embodiment of this application, omitting the feed line;
[0019] Figure 4 yes Figure 2 A sectional view along the middle AA;
[0020] Figure 5 This is a simulation result of the far-field 3D radiation of the antenna device according to an embodiment of this application;
[0021] Figure 6 This is a simulation result of the far-field 2D radiation of the antenna device according to an embodiment of this application;
[0022] Figure 7 This is a simulation result diagram of the reflection coefficient S11 of the antenna device according to an embodiment of this application. Detailed Implementation
[0023] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0025] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0026] Please see Figure 1 and Figure 2This application provides an antenna device 100, including a central element 10, a ring element 20, and a feed line 30. The central element 10 has a first feed point 111. The ring element 20 is arranged at intervals around the periphery of the central element 10, and the ring element 20 has a second feed point 21. The feed line 30 includes a first conductor 31 and a second conductor 32. The first end of the first conductor 31 is electrically connected to the first feed point 111, and the first end of the second conductor 32 is electrically connected to the second feed point 21. The second ends of both the first conductor 31 and the second conductor 32 are used to connect to an external radio frequency port. By designing the two elements in a nested structure, i.e., the ring element 20 surrounds the outside of the central element 10, and the first conductor 31 and the second conductor 32 of the feed line 30 are respectively connected to the first feed point 111 and the second feed point 21, the overall size of the antenna device 100 can be reduced without affecting the performance of the antenna, thereby allowing the antenna device 100 to be installed inside a product to meet the requirements of product miniaturization.
[0027] The central vibrator 10 and the ring vibrator 20 of the antenna device 100 of this application are excited separately through independent first feed points 111 and second feed points 21 to generate complementary resonance modes, which can cover a wide frequency band from 5.15 GHz to 5.85 GHz (such as Wi-Fi 6E), effectively solving the problem of insufficient bandwidth of a single vibrator. Furthermore, the first feed point 111 and the second feed point 21 are set close to each other, and their feed network is simple, reducing the complexity of manufacturing.
[0028] In some embodiments, the first feed point 111 is a positive feed point, and the second feed point 21 is a negative feed point. The central oscillator 10 (positive pole) and the ring oscillator 20 (negative pole) form an antiphase current, which excites an orthogonal electromagnetic field, improves the cross-polarization ratio, and enhances the signal stability in a multipath environment.
[0029] In some embodiments, please refer to Figure 1 and Figure 2 The central vibrator 10 includes a main body 11, a first branch 12, and a second branch 13. The main body 11 has a first feed point 111. The first branch 12 and the second branch 13 are respectively disposed on both sides of the main body 11 in a first direction X. The central vibrator 10 has an axisymmetric structure, and the axis of symmetry M of the central vibrator 10 extends along a second direction Y. The first direction X is perpendicular to the second direction Y. By designing the central vibrator 10 into a symmetrical structure, a directional radiation field is formed, which can improve the directional performance of the antenna device 100, enhance the directivity of the signal, increase the bandwidth of the antenna device 100, and increase the communication efficiency of the antenna device 100.
[0030] In further embodiments, please refer to Figures 1 to 3Both the first branch 12 and the second branch 13 extend along the first direction X. The first branch 12 and the second branch 13, together with the main body 11, form a "T"-shaped structure, which further improves the directional performance of the antenna device 100, increases its bandwidth, and enhances its communication efficiency. The structure of the first branch 12 and the second branch 13 extending along the first direction X extends the current path, thereby reducing return loss. Furthermore, the straight extension of the first branch 12 and the second branch 13 in the first direction X maximizes space utilization and enhances the radiation intensity of horizontally polarized waves. In some embodiments, please refer to... Figure 2 and Figure 3 The main body 11 extends partially beyond the first branch 12 and the second branch 13 along the second direction Y, which is beneficial to improving the directional performance of the antenna device 100.
[0031] In some embodiments, the annular oscillator 20 is spaced around the outer side of the central oscillator 10, which can significantly reduce two-port coupling interference and improve radiation efficiency. It is understood that the shape of the annular oscillator 20 can be varied, such as circular, elliptical, triangular, polygonal, or irregular shapes. For one embodiment of this application, please refer to... Figures 1 to 3 The ring oscillator 20 has a rectangular ring structure. On the one hand, the ring oscillator 20 with the rectangular ring structure tightly surrounds the central oscillator 10, which expands the radiation boundary within a limited area and improves the overall performance of the antenna device 100. In addition, the rectangular ring structure is easy to process and manufacture, effectively reducing the processing difficulty and improving the manufacturing efficiency. On the other hand, the right-angle structure excites the edge current and generates a uniform omnidirectional radiation field, which is suitable for multi-device coverage scenarios.
[0032] In some embodiments, please refer to Figure 4 The antenna device 100 includes a substrate 40, a central vibrator 10 and a ring vibrator 20 disposed on the same side of the substrate 40. On the one hand, the central vibrator 10 and the ring vibrator 20 located on the same side can enhance the synergistic effect and improve the overall performance of the antenna device 100. On the other hand, it can simplify the etching process on the circuit board and reduce the manufacturing difficulty and manufacturing cost.
[0033] In some embodiments, the center frequency F1 of the central vibrator 10 is 5.5 GHz; and / or, the center frequency F2 of the ring vibrator 20 is 5.5 GHz. By limiting the center frequency of the central vibrator 10 and / or the center frequency of the ring vibrator 20 to 5.5 GHz, a relatively flat gain within the frequency band can be ensured, enabling the antenna device 100 to have a bandwidth of 5.15 GHz to 5.85 GHz, supporting Wi-Fi 6E channels, enhancing the communication performance of the antenna device 100, and reducing losses.
[0034] In some embodiments, please refer to Figure 2By limiting the size of the central vibrator 10 and the size of the ring vibrator 20 of the antenna device 100, the antenna device 100 can meet the miniaturization requirements of the product while ensuring communication performance.
[0035] In some embodiments, the antenna device 100 satisfies at least one of the following conditions: (1) along the first direction X, the length L1 of the central vibrator 10 satisfies: 13.5mm ≤ L1 ≤ 18.7mm. (2) along the second direction Y, the length L2 of the central vibrator 10 satisfies: 6mm ≤ L2 ≤ 12.5mm. (3) along the first direction X, the length L3 of the ring vibrator 20 satisfies: 24mm ≤ L3 ≤ 30mm. (4) along the second direction Y, the length L4 of the ring vibrator 20 satisfies: 18mm ≤ L4 ≤ 26mm. By limiting the dimensions of the central vibrator 10 and the ring vibrator 20 in the first direction X and the second direction Y, the resonant frequencies of the central vibrator 10 and the ring vibrator 20 can be controlled to ensure that the resonant frequencies are within the target frequency band, and to avoid high-frequency mismatch caused by excessive size of the two. Furthermore, limiting the dimensions of the central vibrator 10 and the ring vibrator 20 to the above-mentioned dimensions makes the overall size of the antenna device 100 smaller, which is convenient for installation inside the product. (5) The ring width L5 of the ring oscillator 20 satisfies: 2mm≤L5≤3mm; if the ring width of the ring oscillator 20 is too narrow, it will cause processing difficulties, and if it is too wide, it will reduce the coupling efficiency. Within this range, performance and yield can be balanced. (6) Along the third direction Z, the thickness H1 of the center oscillator 10 satisfies: 0.2mm≤H1≤1mm. (7) Along the third direction Z, the thickness H2 of the ring oscillator 20 satisfies: 0.2mm≤H2≤1mm; (8) The feed line 30 includes a coaxial cable, and the diameter D of the coaxial cable satisfies: 0.8mm≤D≤2mm. Setting the diameter of the coaxial cable within the above range can match the current capacity of the center oscillator 10 and the ring oscillator 20, and avoid the impedance change of the feed line 30 from affecting the performance of the antenna device 100. In some embodiments, the coaxial cable includes the first conductor 31 and the second conductor 32 mentioned above. The second conductor 32 is nested outside the first conductor 31, and the first conductor 31 and the second conductor 32 are coaxially arranged. The first end of the first conductor 31 and the first end of the second conductor 32 constitute one end of a coaxial cable. The other end of the coaxial cable is connected to an RF plug 33, which is used to connect to the RF interface of the product's circuit board.
[0036] This application also provides an embodiment of a wireless communication device, which includes a housing and an antenna device 100. The specific structure and function of the antenna device 100 can be found in the above embodiments and will not be repeated here. The antenna device 100 is disposed on the inner sidewall of the housing, and the housing provides protection for the antenna device 100.
[0037] In some embodiments, a clearance area is provided on the outer side of the antenna device 100, and the length L6 of the clearance area satisfies: L6≥10mm. By providing a clearance area of the first size on the outer side of the antenna device 100, the influence of the product's components on the working performance of the antenna device 100 can be reduced, thereby ensuring that the antenna device 100 operates under optimal performance.
[0038] To facilitate understanding of the structure and performance of the antenna device of this application, a simulation experiment of the antenna device is conducted. The specific dimensional parameters of the antenna device are as follows: L1 is 13.5mm, L2 is 9mm, L3 is 24mm, L4 is 18mm, L5 is 2.7±0.05mm, and H1 and H2 are both 0.5mm.
[0039] in Figure 5 This is a simulation result of the far-field 3D radiation of the antenna device. Figure 6 The figure shows the simulation results of the far-field 2D radiation of the antenna device. Figure 5 and Figure 6 The maximum gain of the display antenna device can reach about 4.3 dBi, and its 5.5 GHz far-field radiation has obvious directivity on the Z-axis (0 degrees and 180 degrees), exhibiting good directivity.
[0040] Figure 7 The image shows the simulation results for the reflection coefficient S11 of the antenna device. S11 is the ratio of the reflected wave to the incident wave at the antenna input port, usually called return loss, and expressed in decibels (dB). A smaller value indicates better impedance matching between the antenna and the feed port, resulting in lower energy loss. For example, a good antenna design typically requires an S11 value below -10dB. Figure 1 Point 1 has a reflection coefficient S11 of -33.489 for a frequency of 5.5 GHz, point 2 has a reflection coefficient S11 of -20.378 for a frequency of 5.15 GHz, and point 3 has a reflection coefficient S11 of -25.086 for a frequency of 5.85 GHz. Figure 7 The data shows that the antenna device of this application has a large bandwidth margin, can effectively cover 5.15GHz to 5.85GHz, and its reflection coefficient S11 can be much lower than -10dB, with low return loss and excellent performance.
[0041] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An antenna device, characterized in that, include: The central oscillator is equipped with a first feed point; A ring-shaped oscillator is arranged at intervals around the periphery of the central oscillator, and the ring-shaped oscillator is provided with a second feed point; The feeder includes a first conductor and a second conductor. The first end of the first conductor is electrically connected to the first feed point, and the first end of the second conductor is electrically connected to the second feed point. The second ends of both the first conductor and the second conductor are used to connect to an external radio frequency port.
2. The antenna device according to claim 1, characterized in that, The central oscillator includes a main body, a first branch, and a second branch. The main body is provided with the first feed point. The first branch and the second branch are respectively located on both sides of the main body in a first direction. The central oscillator has an axisymmetric structure, and the axis of symmetry of the central oscillator extends along a second direction. The first direction is perpendicular to the second direction.
3. The antenna device according to claim 2, characterized in that, Both the first branch and the second branch extend along the first direction.
4. The antenna device according to any one of claims 1-3, characterized in that, The ring oscillator has a rectangular ring structure.
5. The antenna device according to claim 4, characterized in that, The antenna device further includes a substrate, and the central vibrator and the ring vibrator are disposed on the same side of the substrate.
6. The antenna device according to claim 4, characterized in that, The bandwidth of the antenna device is 5.15 GHz to 5.85 GHz; and / or, the center frequency F1 of the central vibrator is 5.5 GHz; and / or, the center frequency F2 of the ring vibrator is 5.5 GHz.
7. The antenna device according to claim 4, characterized in that, The antenna device satisfies at least one of the following conditions: (1) Along the first direction, the length L1 of the central oscillator satisfies: 13.5mm≤L1≤18.7mm; (2) Along the second direction, the length L2 of the central oscillator satisfies: 6mm≤L2≤12.5mm; (3) Along the first direction, the length L3 of the annular oscillator satisfies: 24mm≤L3≤30mm; (4) Along the second direction, the length L4 of the annular oscillator satisfies: 18mm≤L4≤26mm; (5) The ring width length L5 of the ring oscillator satisfies: 2mm≤L5≤3mm; (6) Along the third direction, the thickness H1 of the central oscillator satisfies: 0.2mm≤H1≤1mm; (7) Along the third direction, the thickness H2 of the annular oscillator satisfies: 0.2mm≤H2≤1mm; (8) The feeder includes a coaxial cable, and the diameter D of the coaxial cable satisfies: 0.8mm≤D≤2mm.
8. The antenna device according to claim 4, characterized in that, The first feed point is the positive feed point, and the second feed point is the negative feed point.
9. A wireless communication device, characterized in that, It includes a housing and an antenna device as described in any one of claims 1-8, wherein the antenna device is disposed on the inner sidewall of the housing.
10. The wireless communication device according to claim 9, characterized in that, The antenna device has a clearance area on its outer side, and the length L6 of the clearance area satisfies: L6≥10mm.