Circularly polarized single-layer dual-frequency antenna
By designing a circularly polarized single-layer dual-frequency antenna, the structure of the top-layer patch, coupled patch and side patch, combined with the adjustment of the defective strip structure, the dual-frequency effect is achieved, solving the problems of large size, heavy weight and high cost of existing dual-frequency antennas, and achieving size reduction and cost reduction.
Patent Information
- Application Number
- CN202422659053.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Existing dual-band antennas usually adopt a double stacked structure, resulting in larger sizes, heavier weights and higher costs, making it difficult to reduce size and cost while achieving dual-band.
A circular polarized single-layer dual-frequency antenna is designed, using a dielectric substrate, a top-layer patch, a coupling patch, a side patch, a bottom patch, a first feeding needle and a second feeding needle. The dual-frequency is achieved through the structural design of the top-layer patch and a coupled patch, and combined with the adjustment of the side patch and the defective strip structure, the resonant frequency adjustment is achieved, and a single-layer structure is adopted to reduce size and weight.
A single-layer structure with dual-frequency effect is achieved, reducing the size and weight of the antenna, simplifying the processing technology, reducing costs, and improving the reliability of the device.
Smart Images
Figure CN223273503U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of antennas, and more specifically, relates to a circularly polarized single-layer dual-frequency antenna. Background Art
[0002] Existing dual-band antennas typically use a two-layer structure, with each layer corresponding to a specific frequency band. However, this double-layer structure often results in larger, heavier, and more expensive antennas. Reducing the size and weight of antennas while achieving dual-band performance and reducing costs is a key concern in this field and requires further resolution. Utility Model Content
[0003] The utility model provides a circularly polarized single-layer dual-frequency antenna, thereby solving the problems of large size, heavy weight and high cost of the dual-frequency antenna in the prior art.
[0004] The utility model provides a circularly polarized single-layer dual-frequency antenna, comprising: a dielectric substrate, a top patch, a coupling patch, a side patch, a bottom patch, a first feeding pin and a second feeding pin; the top patch is arranged on the top of the dielectric substrate; the coupling patch comprises a first coupling patch, a second coupling patch, a third coupling patch and a fourth coupling patch, which are all identical in size and structure, each coupling patch comprises at least one defective strip structure, and four coupling patches are arranged on the top of the dielectric substrate and distributed around the top patch; the bottom patch is arranged on the bottom of the dielectric substrate; the side patches comprise a first side patch, a second side patch, a third side patch and a fourth side patch, which are all identical in size and structure, and four side patches are arranged on the side of the dielectric substrate, each side patch is connected to the corresponding coupling patch and the bottom patch; the first feeding pin and the second feeding pin both pass through the top patch, the dielectric substrate and the bottom patch.
[0005] Preferably, the defect strip structure is a rectangular structure, and a portion of the area on a side of the coupling patch facing the top patch is recessed.
[0006] Preferably, each coupling patch includes one defect strip structure, and the defect strip structure is located in the central area of the coupling patch.
[0007] Preferably, the side patch is located in the central area of the side surface of the dielectric substrate.
[0008] Preferably, the top patch is provided with an extension block extending outward.
[0009] Preferably, each side of the top patch includes a plurality of the extension blocks.
[0010] Preferably, the minimum distance between the side of the coupling patch facing the top patch and the top patch is 0.1 mm to 3 mm.
[0011] Preferably, the first resonant frequency of the circularly polarized single-layer dual-band antenna is 1164 MHz to 1188 MHz, and the second resonant frequency is 1565 MHz to 1586 MHz.
[0012] Preferably, the dielectric matrix is a cubic structure, and the four corners of the dielectric matrix are chamfered.
[0013] Preferably, the dielectric matrix is made of ceramic, plastic, or a composite material of plastic and ceramic.
[0014] One or more technical solutions provided in this utility model have at least the following technical effects or advantages:
[0015] (1) The circularly polarized single-layer dual-frequency antenna provided by the present invention includes a dielectric substrate, a top patch, a coupling patch, a side patch, a bottom patch, a first feeding pin and a second feeding pin; the top patch is arranged on the top of the dielectric substrate; the coupling patch includes four coupling patches of the same size and structure, each coupling patch includes at least one defective strip structure, and the four coupling patches are arranged on the top of the dielectric substrate and distributed around the top patch; the bottom patch is arranged on the bottom of the dielectric substrate; the side patches include a first side patch, a second side patch, a third side patch and a fourth side patch of the same size and structure, and the four side patches are arranged on the side of the dielectric substrate, and each side patch is connected to the corresponding coupling patch and the bottom patch; the first feeding pin and the second feeding pin both pass through the top patch, the dielectric substrate and the bottom patch. The present invention can achieve dual-band through the structural design of the top patch and the coupling patch, and adjust the resonant frequency of the antenna by adjusting the size of the side patch. On the basis of the coarse adjustment of the side patch, the resonant frequency of the low frequency band in the dual frequency can be further fine-tuned by setting the defect strip structure. The present invention combines the design of the side patch and the defect strip structure to implement frequency adjustment more conveniently and quickly, and the design of the side patch has the advantages of simple processing technology and further cost reduction compared with the existing conventional scheme using the metallized through-hole design. The present invention can further fine-tune the resonant frequency of the high frequency band in the dual frequency by setting the distance between the top patch and the coupling patch. The amplitudes of the signals in the first feeding pin and the second feeding pin are equal, and the signals of the two have a phase delay of 90°. The setting of the two feeding pins can achieve a circularly polarized radiation effect. In summary, the present invention can achieve a dual-band effect similar to that of a double-stacked structure antenna with a single-layer structure. The single-layer structure design adopted by the present invention can effectively reduce the size and weight of the dual-band antenna, reduce costs, and is suitable for industrial mass production. The single-layer structure design can also reduce processing difficulty and improve device reliability.
[0016] (2) The defect strip structure in the present invention can be of various geometric shapes. When the defect strip structure is a rectangular structure, that is, when part of the area on the side of the coupling patch facing the top patch is recessed, the structure is simpler and easier to process. By adjusting the dimensional parameters of the length or width of the rectangular structure, the resonant frequency of the low frequency band can be further adjusted, and the adjustment is very convenient.
[0017] (3) The utility model arranges the side patch in the central area of the side of the dielectric substrate, which can optimize the radiation performance of the antenna to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of the structure of a circularly polarized single-layer dual-band antenna provided in Example 1 of the present utility model Figure 1 ;
[0019] Figure 2 A schematic diagram of the structure of a circularly polarized single-layer dual-band antenna provided in Example 1 of the present utility model Figure 2 ;
[0020] Figure 3 A schematic diagram of the structure of a circularly polarized single-layer dual-band antenna provided in Example 2 of the present utility model Figure 1 ;
[0021] Figure 4 A schematic diagram of the structure of a circularly polarized single-layer dual-band antenna provided in Example 2 of the present utility model Figure 2 .
[0022] Among them, 110—dielectric substrate, 120—first feeding needle, 130—second feeding needle, 140—top patch, 141—extension block, 150—first coupling patch, 151—first defect strip structure, 160—second coupling patch, 161—second defect strip structure, 170—third coupling patch, 171—third defect strip structure, 180—fourth coupling patch, 181—fourth defect strip structure, 191—first side patch, 192—second side patch, 193—third side patch, 194—fourth side patch. DETAILED DESCRIPTION
[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.
[0024] Example 1:
[0025] Example 1 provides a circularly polarized single-layer dual-band antenna, see Figure 1 、 Figure 2 ,in, Figure 2 For the general Figure 1Schematic diagram of the structure after the structure in is rotated 180°, embodiment 1 provides a circularly polarized single-layer dual-band antenna comprising: a dielectric substrate 110, a top patch 140, a coupling patch, a side patch, a bottom patch, a first feeding needle 120 and a second feeding needle 130; the top patch 140 is arranged on the top of the dielectric substrate 110; the coupling patch comprises a first coupling patch 150, a second coupling patch 160, a third coupling patch 170 and a fourth coupling patch 180 of the same size and structure, each coupling patch comprises at least one defective strip structure, and four coupling patches are arranged on the dielectric substrate The top of the dielectric body 110 is distributed around the top patch 140; the bottom patch is arranged at the bottom of the dielectric substrate 110; the side patches include a first side patch 191, a second side patch 192, a third side patch 193 and a fourth side patch 194 with the same size and structure, and the four side patches are arranged on the side of the dielectric substrate 110, and each side patch is connected to the corresponding coupling patch and the bottom patch; the first feeding needle 120 and the second feeding needle 130 both pass through the top patch 140, the dielectric substrate 110 and the bottom patch.
[0026] The present invention can achieve dual-frequency through the structural design of the top patch 140 and the coupling patch. Specifically, the high frequency is mainly achieved through the top patch 140 plus the coupling between the top patch 140 and the coupling patch, and the low frequency is mainly achieved through the coupling between the top patch 140 and the coupling patch.
[0027] Specifically, the first side patch 191 contacts the first coupling patch 150 and the bottom patch, the second side patch 192 contacts the second coupling patch 160 and the bottom patch, the third side patch 193 contacts the third coupling patch 170 and the bottom patch, and the fourth side patch 194 contacts the fourth coupling patch 180 and the bottom patch.
[0028] In a preferred embodiment, the side patch is located in the center of the side of the dielectric substrate 110. The side patch has a rectangular structure and is perpendicular to the corresponding coupling patch and the bottom patch. Placing the side patch in the center of the side of the dielectric substrate 110 improves the antenna's radiation performance compared to placing it in other locations.
[0029] The defect strip structure can have various geometric shapes, such as rectangular, square, and irregular shapes. When the defect strip structure is rectangular, a portion of the coupling patch facing the top patch 140 is recessed. For example, each coupling patch includes one defect strip structure located in the center of the coupling patch. For another example, each coupling patch may include multiple defect strip structures, with a distance between adjacent defect strip structures.
[0030] That is, the first coupling patch 150 includes the first defect strip structure 151, and the first defect strip structure 151 is located in the central area of the first coupling patch 150; similarly, the second coupling patch 160 includes the second defect strip structure 161, and the second defect strip structure 161 is located in the central area of the second coupling patch 160; the third coupling patch 170 includes the third defect strip structure 171, and the third defect strip structure 171 is located in the central area of the third coupling patch 170; the fourth coupling patch 180 includes the fourth defect strip structure 181, and the fourth defect strip structure 181 is located in the central area of the fourth coupling patch 180.
[0031] The present invention adjusts the antenna's resonant frequency by adjusting the size (e.g., width) of the side patches. The side patches have a greater range of adjustment than the defective strip structure. Adjusting the size of the defective strip structure can adjust the antenna's low-frequency resonant frequency. When the defective strip structure is rectangular, increasing the length (L) or width (D) of the rectangular structure can increase the low-frequency resonant frequency.
[0032] The utility model uses the side patches for coarse adjustment and further performs fine adjustment through the design of the defective strip structure. The utility model combines the design of the side patches and the defective strip structure to implement frequency adjustment more conveniently and quickly.
[0033] A minimum distance d between the side of the coupling patch facing the top patch 140 and the top patch 140 is 0.1 mm to 3 mm.
[0034] By setting the distance between the top patch 140 and the coupling patch (ie, the minimum distance d), the resonant frequency of the high frequency band in the dual-band can be further fine-tuned. Specifically, increasing the distance between the top patch 140 and the coupling patch can increase the resonant frequency of the high frequency band.
[0035] The first resonant frequency of the circularly polarized single-layer dual-band antenna is 1164MHz to 1188MHz, and the second resonant frequency is 1565MHz to 1586MHz. It should be noted that the above two frequency ranges can be extended to surrounding frequency bands and are not limited to the above two frequency bands. The above frequency bands are only used for illustration.
[0036] The dielectric substrate 110 may be a cubic structure with chamfers at the four corners of the dielectric substrate 110. The dielectric substrate 110 is made of ceramic, plastic, or a composite material of plastic and ceramic, and mainly serves as a carrier for the patch.
[0037] The top patch 140 is mainly used for radiation or transmission of signals.
[0038] Specifically, the first feeding needle 120 and the second feeding needle 130 both vertically penetrate the top patch 140, the dielectric substrate 110, and the bottom patch, and the tops of the first feeding needle 120 and the second feeding needle 130 are both fixed to the top patch 140. The first feeding needle 120 and the second feeding needle 130 adopt a direct feeding method, which has the advantages of simple structure and easy implementation.
[0039] Example 2:
[0040] Example 2 provides a circularly polarized single-layer dual-band antenna, see Figure 3 、 Figure 4 ,in, Figure 4 For the general Figure 3 Schematic diagram of the structure after the structure in is rotated 180°, the difference between Example 2 and Example 1 is that the top patch 140 in Example 2 is further provided with an extension block 141 extending outward.
[0041] Specifically, each side of the top patch includes one extension block, or each side of the top patch includes a plurality of extension blocks.
[0042] By setting the extension block 141, the function of adjusting the antenna resonant frequency can be achieved. Specifically, Example 2 can adjust the low-frequency resonant frequency of the antenna by adjusting the size of the side patch, the size of the defect strip structure, and the size of the delay block 141. Therefore, the solution provided by Example 2 has the advantage of more flexible adjustment method compared to Example 1.
[0043] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A circularly polarized single-layer dual-band antenna, characterized in that: include: A dielectric substrate, a top patch, a coupling patch, a side patch, a bottom patch, a first feeding needle and a second feeding needle; The top patch is arranged on the top of the dielectric substrate; the coupling patch includes a first coupling patch, a second coupling patch, a third coupling patch and a fourth coupling patch of the same size and structure, each coupling patch includes at least one defect strip structure, and four coupling patches are arranged on the top of the dielectric substrate and distributed around the top patch; the bottom patch is arranged on the bottom of the dielectric substrate; the side patches include a first side patch, a second side patch, a third side patch and a fourth side patch of the same size and structure, four side patches are arranged on the side of the dielectric substrate, and each side patch is connected to the corresponding coupling patch and the bottom patch; the first feeding needle and the second feeding needle both pass through the top patch, the dielectric substrate and the bottom patch.
2. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The defect strip structure is a rectangular structure, and a portion of the coupling patch on a side facing the top patch is recessed.
3. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: Each coupling patch includes one defect strip structure, and the defect strip structure is located in the central area of the coupling patch.
4. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The side patch is located in the central area of the side surface of the dielectric substrate.
5. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The top layer patch is provided with an extension block extending outward.
6. The circularly polarized single-layer dual-frequency antenna according to claim 5, characterized in that: Each side of the top patch includes a plurality of the extension blocks.
7. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The minimum distance between the side of the coupling patch facing the top patch and the top patch is 0.1 mm to 3 mm.
8. The circularly polarized single-layer dual-band antenna according to claim 1, wherein: The first resonant frequency of the circularly polarized single-layer dual-frequency antenna is 1164 MHz to 1188 MHz, and the second resonant frequency is 1565 MHz to 1586 MHz.
9. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The dielectric matrix is a cubic structure, and the four corners of the dielectric matrix are chamfered.
10. The circularly polarized single-layer dual-band antenna according to claim 1, characterized in that: The dielectric matrix is made of ceramic, plastic, or a composite material of plastic and ceramic.