CN213936548U - Dual-band dielectric resonant antenna with super-surface circular polarization - Google Patents
Dual-band dielectric resonant antenna with super-surface circular polarization Download PDFInfo
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Abstract
The application provides a dual-band dielectric resonant antenna with super-surface circular polarization, and relates to the design of dielectric resonant antennas. The invention consists of a substrate, a rectangular dielectric resonator, a super surface, a circular patch and a coaxial probe. The super surface of the upper surface of the substrate formed by the 7 x 7 array of "-" shaped metal units is used for realizing the circular polarization of the antenna. The circular patch on the rectangular dielectric resonator is used for realizing the dual-band working mode of the antenna. The invention realizes the dual-band working modes of 24.7 percent (4.23GHz-5.42GHz) and 8.5 percent (5.60GHz-6.10GHz), can be used for 5GNR and WLAN, well realizes the circular polarization working mode in the working band of 5.60GHz-6.10GHz, and can be used for radar and electronic countermeasure.
Description
Technical Field
The application relates to the field of dielectric resonant antennas, in particular to a dual-band dielectric resonant antenna with super-surface circular polarization.
Background
In the microwave frequency band, the performance of the dielectric resonance antenna is superior to that of a microstrip antenna. Because the dielectric resonant antenna is metal lossless, low loss can still be realized in a high-frequency wave band, the dielectric resonant antenna can be made into different shapes to meet the requirements of different scenes, and feeding can be performed in various modes, so that the design is flexible.
Because the circularly polarized antenna has good penetrating power and a large radiation range, the circularly polarized antenna is more and more valued by people. It has important application in the fields of communication, radar, electronic countermeasure, broadcast television, electronic reconnaissance and the like. In 2018, a broadband circularly polarized radiation antenna based on a super-surface is provided, so that the bandwidth of the antenna is effectively improved, but the antenna can only work in a single frequency band.
In recent years, in artificial structural materials, research and application of super-surfaces become a hot spot, and electromagnetic properties which natural materials do not have can be realized. The super surface is a two-dimensional structural unit array of thin and densely arranged metamaterials, and can control electromagnetic waves. The super-surface unit cells are sub-wavelength in size and arrangement period, and thus have a uniform plane like a uniform polarizer, reflecting and transmitting plane waves, as opposed to the diffraction grating effect which generates multiple diffraction lobes. With the development of the super-surface, which is used for polarization manipulation, the size and thickness of the polarization conversion device can be significantly reduced by the use of the super-surface. When linearly polarized waves radiated by the antenna are incident on the linear circular polarization conversion surface, an incident wave electric field can be decomposed into two orthogonal constant-amplitude polarization components, the phase difference of the two components is 90 degrees by designing the structural unit structure of the super surface, and then the circularly polarized waves can be obtained. The mode of converting the linear circular polarization into the super surface is adopted, the design of a complex feed network is avoided, the section of the whole structure is effectively reduced, the application range is wider, and the control is easier.
In recent years, the demand for dual-band antennas has been increasing in communication systems, and many kinds of dual-band dielectric resonant antennas have been proposed. One common method for designing dual-band dielectric resonant antennas is to use two different dielectric resonators and a coupling slot to achieve circular polarization, but this design method necessarily increases the size of the antenna. Another method is to combine a dielectric resonator antenna and a slot resonator into a dual-band antenna, and directly connect the slot resonator to the feed network of the dielectric resonator antenna, so that it is very difficult to design any two operating frequencies. The design adopts the mode of super surface and metal patch to realize the characteristics of double frequency and circular polarization, the design is flexible and simple, the processing is easy, and the whole section of the antenna can be effectively reduced.
Disclosure of Invention
The present application relates to the design of dielectric resonant antennas, the design of circularly polarized antennas, the design of dual band antennas and the optimization of antennas. The application provides a dual-band dielectric resonant antenna with super-surface circular polarization, which can work in dual-frequency bands and realizes very good circular polarization performance in one working band.
The application aims to provide a dual-band dielectric resonant antenna with super-surface circular polarization, which can realize a dual-band working mode of the dielectric resonant antenna in a high-frequency band and realize a circular polarization radiation mode in one working band.
The technical scheme is as follows:
a dual band dielectric resonant antenna for super-surface circular polarization, comprising: the device comprises a substrate, a super surface, a rectangular dielectric resonator, a circular patch and a coaxial probe; wherein the content of the first and second substances,
the upper surface of the dielectric substrate is covered with a super surface, the lower surface of the dielectric substrate is a metal ground, the rectangular resonant cavity is placed above the super surface, the upper surface of the rectangular resonant cavity is covered with a circular copper sheet, and the whole antenna structure is connected and fed through a coaxial feeder.
The substrate is a single-layer FR4 substrate with the thickness of 3.2mm, and a layer of metal is covered below the substrate and used as a reference ground;
the super surface is composed of 7 multiplied by 7 "-" shaped metal structural units, is used for reducing the axial ratio of the antenna and is used for realizing the circular polarization characteristic of the antenna;
the rectangular dielectric resonator is composed of a ROGERS TMM 10 dielectric with the thickness of 8 mm;
the circular patch is composed of a metal patch with the radius of 3.55mm, is positioned in the middle of the rectangular dielectric resonator and is used for realizing the dual-band working characteristic of the antenna;
the coaxial probe is used to feed the entire antenna.
The application realizes the dual-band working modes of 24.7% (4.23GHz-5.42GHz) and 8.5% (5.60GHz-6.10GHz), and can be used for 5G NR and WLAN. The circularly polarized radiation is realized in the working frequency band of 5.60GHz-6.10GHz, and the circularly polarized radiation can be used for radar and electronic countermeasure.
The radiation device has the advantages of wide radiation range, multiple purposes and simple production process.
Drawings
Fig. 1 is a top view of a dual-band dielectric resonator antenna structure with super-surface circular polarization according to an embodiment of the present application.
Fig. 2 is a cross-sectional view of a dual-band dielectric resonator antenna structure with super-surface circular polarization according to an embodiment of the present application.
Fig. 3 is a graph showing reflection coefficient results of the dual-band dielectric resonator antenna with super-surface circular polarization according to the embodiment of the present application.
Fig. 4 is a diagram illustrating axial ratio results of the dual-band dielectric resonator antenna with super-surface circular polarization according to the embodiment of the present application.
Fig. 5 is a graph illustrating the gain result of the dual-band dielectric resonator antenna with super-surface circular polarization according to the embodiment of the present application.
Detailed Description
The invention is further described in detail with reference to the following specific examples and the accompanying drawings.
As shown in fig. 1, the present application provides a dual band dielectric resonant antenna with super-surface circular polarization, comprising: the device comprises a substrate 1, a super surface 2, a rectangular dielectric resonator 3, a circular patch 4 and a coaxial probe 5; wherein the content of the first and second substances,
etching a super surface 2 on a substrate 1, placing a rectangular dielectric resonator 3 on the super surface 2, covering a circular patch 4 right above the rectangular dielectric resonator 3, and feeding power to an antenna through a coaxial probe 5, thereby realizing radiation of the antenna;
the substrate 1 is a single-layer FR4 substrate with the thickness of 3.2mm, and a layer of metal is covered below the substrate and used as a reference ground;
the super-surface 2 is composed of rectangular metal structural units arranged by 7 x 7, is used for reducing the axial ratio of the antenna and is used for realizing the circular polarization characteristic of the antenna;
the rectangular dielectric resonator 3 is formed by a ROGERS TMM 10 (Rogers TMM 10, commercially available) dielectric with the thickness of 8 mm;
the circular patch 4 is composed of a metal patch with the radius of 3.55mm, is positioned in the middle of the rectangular dielectric resonator 3 and is used for realizing the dual-band working characteristic of the antenna;
the coaxial probe 5 is used to feed the entire antenna.
Fig. 3 is a graph of the variation of the S11 parameter of the antenna with frequency, when the S11 parameter value of the antenna is less than-10 dB, the impedance matching is good, and the antenna can work normally. When the circular patch 4 is not provided, the S11 parameter of the antenna has only one lowest point, namely only one resonance point, and belongs to a single-band antenna; when the circular patch 4 is added, the S11 parameter curve of the antenna has two lowest points, namely two resonance points, and is in a dual-band working state. Thus, the circular patch 4 well realizes the dual-band operation characteristic of the antenna.
Fig. 4 is a graph showing the axial ratio of the antenna as a function of frequency, and when the axial ratio of the antenna is less than 3dBi, the antenna is considered to be in a circular polarization operating state. When the super surface 2 does not exist, the axial ratio values of the antennas are all larger than 3dBi, and the antennas are not in a circular polarization working state; when the super surface 2 is added, the axial ratio of the antenna on the frequency band of 5.60GHz-6.10GHz is lower than 3dBi, and the antenna is in a circular polarization working state. Therefore, the super-surface 2 well reduces the axis ratio of the antenna, and the circular polarization operating characteristic of the antenna is realized.
Fig. 5 is a graph showing the variation of the gain of the antenna with frequency, and the maximum gain of the antenna reaches 7.2dBi, thereby realizing a high-gain circularly polarized operating mode.
The application realizes the dual-band working mode of 24.7 percent (4.23GHz-5.42GHz) and 8.5 percent (5.60GHz-6.10GHz) and the maximum gain of 7.2 dBi. Can be used for 5G NR (new radio) and WLAN. The super-surface on the substrate effectively reduces the axial ratio of the antenna, realizes circular polarization on a frequency band of 5.60GHz-6.10GHz, and can be used for radar and electronic countermeasure.
Claims (4)
1. A dual band dielectric resonator antenna for super-surface circular polarization, comprising: the device comprises a substrate (1), a super surface (2), a rectangular dielectric resonator (3), a circular patch (4) and a coaxial probe (5); wherein the content of the first and second substances,
etching a super surface (2) on a substrate (1), placing a rectangular dielectric resonator (3) on the super surface (2), covering a circular patch (4) right above the rectangular dielectric resonator (3), and feeding power to an antenna through a coaxial probe (5), thereby realizing radiation of the antenna;
a layer of metal is covered below the substrate (1) and used as a reference ground;
the super surface is used for reducing the axial ratio of the antenna and realizing the circular polarization characteristic of the antenna;
the circular patch is positioned in the middle of the rectangular dielectric resonator and is used for realizing the dual-band working characteristic of the antenna;
the coaxial probe is used to feed the entire antenna.
2. The dual band dielectric resonator antenna of super surface circular polarization according to claim 1, characterized in that the super surface (2) is composed of rectangular metal structural elements arranged 7 x 7.
3. The dual band dielectric resonator antenna of super surface circular polarization of claim 1, wherein the rectangular dielectric resonator is comprised of a ROGERS TMM 10 dielectric.
4. The dual band dielectric resonator antenna of super surface circular polarization according to claim 1, wherein the substrate (1) is a single layer FR4 substrate with a thickness of 3.2 mm.
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| CN202023129435.6U CN213936548U (en) | 2020-12-23 | 2020-12-23 | Dual-band dielectric resonant antenna with super-surface circular polarization |
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| CN202023129435.6U CN213936548U (en) | 2020-12-23 | 2020-12-23 | Dual-band dielectric resonant antenna with super-surface circular polarization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117913539A (en) * | 2024-03-18 | 2024-04-19 | 西南交通大学 | Circularly polarized antenna based on electromagnetic super surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117913539A (en) * | 2024-03-18 | 2024-04-19 | 西南交通大学 | Circularly polarized antenna based on electromagnetic super surface |
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