CN110492242B - Ultra-thin half-wall short-circuit circularly polarized top radiation antenna - Google Patents
Ultra-thin half-wall short-circuit circularly polarized top radiation antenna Download PDFInfo
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- CN110492242B CN110492242B CN201910769229.4A CN201910769229A CN110492242B CN 110492242 B CN110492242 B CN 110492242B CN 201910769229 A CN201910769229 A CN 201910769229A CN 110492242 B CN110492242 B CN 110492242B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
Abstract
The invention provides an ultrathin half-wall short-circuit circularly-polarized top-end radiation antenna which comprises rectangular radiation microstrip patches, a medium substrate, a metal bottom plate, first metal short-circuit pins and a radio-frequency connector, wherein the rectangular radiation microstrip patches are attached to one side surface of the medium substrate, the other side surface of the medium substrate is fixedly connected with the metal bottom plate, the number of the first metal short-circuit pins is four, the first metal short-circuit pins penetrate through the rectangular radiation microstrip patches, the medium substrate and the metal bottom plate and are connected with the metal bottom plate, the radio-frequency connector is installed on the other side, opposite to the medium substrate, of the metal bottom plate, and coaxial probes in the radio-frequency connector penetrate through the medium substrate and are connected with the rectangular radiation microstrip patches in a welding mode. The problems that the single-layer short-circuit wall patch antenna is low in efficiency and unstable in directional diagram and the like in the existing radiation antenna under the condition of single-point feed are solved.
Description
Technical Field
The invention belongs to the technical field of wireless communication antennas, and particularly relates to an ultrathin half-wall short-circuit circularly polarized top radiating antenna.
Background
In recent years, with the popularization and application of satellite navigation systems, new requirements are made on satellite navigation antennas in both military and civil fields. Due to the relative motion between the satellite and the ground, in order to ensure that satellite signals can be received by different places on the ground, the circularly polarized antenna becomes the best option for satellite communication. Since the antenna is mounted on the satellite, it is necessary to require radiation from the top of the antenna to achieve unidirectional radiation to the ground. Patch antennas are widely used in wireless communication systems due to their advantages of light weight, small size, and easy conformality.
The conventional rectangular patch antenna generally uses perturbation to realize circular polarization, and in order to reduce the size of the antenna, a short-circuit wall antenna is used. At present, the technology for realizing circular polarization of a single-layer short-circuit wall microstrip antenna can generally adopt a sequential spiral arrangement of antenna units, multi-port feed or a multi-layer structure to realize the circular polarization performance of a short-circuit wall patch antenna. In the prior art, for realizing the circular polarization of a short-circuit wall patch antenna, broadband circular polarization radiation is generated by adopting sub-arrays with equal amplitude and 90-degree phase difference. In the second prior art, the circularly polarized radiation field is generated by feeding two ports in a short-circuit wall patch antenna circularly polarized mode. In the third prior art, a pair of orthogonally oriented short-circuit wall antennas is stacked to realize circular polarization performance through a multilayer structure.
However, the first and second technologies require a feed network, so the antenna has a complex structure, high cost, more materials and high processing difficulty. The third technique adopts a multi-layer structure, the profile of the antenna will be raised, which is not favorable for the utilization of the low-profile antenna. The single-layer short-circuit wall patch antenna has the defects of low efficiency, complex structure and the like in use under the condition of single-point feed.
Disclosure of Invention
The present invention provides an ultra-thin half-wall short-circuited circularly polarized top radiating antenna to solve the above-mentioned problems of low efficiency and complex structure of a single-layer short-circuited wall patch antenna under a single-point feeding condition in the background art.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides an ultra-thin half wall short circuit circular polarization top radiation antenna, includes rectangle radiation microstrip paster, medium base plate, metal bottom plate, first metal short circuit pin and radio frequency joint, rectangle radiation microstrip paster adheres to a side at the medium base plate, the another side of medium base plate with fixed connection between the metal bottom plate, first metal short circuit pin is provided with four and its pierces through rectangle radiation microstrip paster, medium base plate and metal bottom plate and with connect between the metal bottom plate, the radio frequency joint is installed metal bottom plate and the opposite side that the medium base plate is relative, the inside coaxial probe of radio frequency joint passes the medium base plate with welded connection between the rectangle radiation microstrip paster.
Preferably, the rectangular radiating microstrip patch is provided with a linear slot with a length of 0.15 λ, and no metal element is arranged inside the linear slot.
Preferably, the dielectric substrate is a substrate sheet based on a formation principle of a substrate integrated waveguide, and a row of second metal short-circuit pins is mounted on the dielectric substrate along an edge of the rectangular radiation microstrip patch.
Preferably, the thickness of the dielectric substrate is less than 0.028 lambda.
Preferably, the rectangular radiating microstrip patch has a length of 0.46 λ and a width of 0.23 λ.
Preferably, the first metal shorting pins have a radius of 1.2mm and are spaced apart from each other by 0.5 mm.
Preferably, the outer layer of the radio frequency connector is fixedly connected with the metal bottom plate.
Compared with the prior art, the invention has the following advantages:
1. four first metal short circuit pins are arranged on one side, close to a radiation edge, of a rectangular radiation microstrip patch at equal intervals, and the first metal short circuit pins are used for adjusting TM (transverse magnetic) of an antenna0,1/2A resonant frequency point of the mode; the radius of the first metal short-circuit pin is 1.2mm, the distance is 0.5mm, and the circular pole of the ultrathin half-wall short-circuit circularly-polarized top-end radiation antenna is realized by adjusting the first metal short-circuit pin of the rectangular radiation microstrip patch and the linear grooveChanging the characteristics; and the dielectric substrate based on the formation principle of the substrate integrated waveguide is positioned in the middle layer of the antenna, and a second metal short circuit pin is arranged on the dielectric substrate along the edge of the rectangular radiation microstrip patch so as to reduce the section size of the antenna, wherein the thickness of the dielectric substrate is less than 0.028 lambda, and the low-section characteristic of the antenna is realized.
2. The radiating antenna adopts single-point feed to radiate circularly polarized electromagnetic waves, the whole antenna has low profile characteristic, the whole size of the antenna is 0.46 lambda × 0.23.23 lambda, the thickness of the antenna is less than 0.028 lambda, so that the profile size of the antenna is smaller than that of the traditional circularly polarized microstrip antenna, the edge of the dielectric substrate is provided with a second metal short-circuit pin, the edge of the second metal short-circuit pin is equivalent to an ideal electric wall, the electromagnetic waves are transmitted in a cavity between the upper surface and the lower surface of a dielectric and a through hole, the profile size of the antenna is reduced, and the TM is enabled to be loaded and adjusted through the first metal short-0,1/2The resonant frequency point of the mode is shifted to high frequency while maintaining the TM1,1/2Keeping the resonant frequency point of the mode unchanged, drawing the distance of the resonant frequency points of two modes, and finally utilizing two orthogonal modes TM0,1/2Mode and TM1,1/2The circular polarization is realized by the mold, so that the influence of the antenna on the appearance of the carrier can be reduced to the greatest extent while the high performance of the antenna is ensured in the use process of the antenna. In addition, the antenna has a simple structure, and can be widely applied to different scenes such as navigation satellites, radars, mobile communication and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a cross-sectional view of the overall structure of the present invention.
FIG. 3 is a graph of the reflection coefficient of an ultra-thin half-wall short-circuited circularly polarized top radiating antenna port of the present invention.
Fig. 4 is an axial ratio plot of the ultra-thin half-wall short-circuited circularly polarized top radiating antenna of the present invention.
Fig. 5 is Phi =90 ° plane pattern at low frequency 2.78GHz of the ultra-thin half-wall short-circuited circularly polarized top radiating antenna of the present invention.
Fig. 6 is a Phi =0 ° plane pattern at low frequency 2.78GHz for an ultra-thin half-wall short-circuited circularly polarized top radiating antenna of the present invention.
Fig. 7 shows the gain variation of the ultra-thin half-wall short-circuited circularly polarized top radiating antenna port of the present invention.
Description of reference numerals:
1-a rectangular radiating microstrip patch; 2-a dielectric substrate; 3-a metal base plate; 4-a first metal shorting pin; 5-a linear slot; 6-a second metal shorting pin; 7-radio frequency connector; 8-coaxial probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The other side of the dielectric substrate 2 is fixedly connected with the metal bottom plate 3, the thickness of the dielectric substrate 2 is smaller than 0.028 lambda, the dielectric substrate 2 is a substrate sheet based on the formation principle of a substrate integrated waveguide, and a row of second metal short circuit pins 6 are arranged on the dielectric substrate 2 along the edge of the rectangular radiation microstrip patch 1 and used for reducing the sectional size of the antenna.
The first metal short circuit pins 4 are provided with four metal short circuit pins which penetrate through the rectangular radiation microstrip patch 1, the dielectric substrate 2 and the metal bottom plate 3 and are connected with the metal bottom plate 3 for adjusting TM of the antenna0,1/2A resonant frequency point of the mode; the radius of the first metal short circuit pin 4 is 1.2mm, the space is 0.5mm, and the circular polarization characteristic of the ultrathin half-wall short circuit circular polarization top end radiation antenna is realized by adjusting the first metal short circuit pin 4 of the rectangular radiation microstrip patch and the linear groove 5
The radio frequency connector 7 is installed on the other side, opposite to the dielectric substrate 2, of the metal base plate 3, a coaxial probe 8 inside the radio frequency connector 7 penetrates through the dielectric substrate 2 to be connected with the rectangular radiation microstrip patch 1 in a welding mode, and the outer layer of the radio frequency connector 7 is fixedly connected with the metal base plate 3.
The principle of the antenna in this embodiment to realize the low profile characteristic is as follows: the second metal short-circuit pin 6 is arranged at the edge of the dielectric substrate 2, so that the edge of the dielectric substrate 2 is equivalent to an ideal electric wall, electromagnetic waves are transmitted in a cavity between the upper surface and the lower surface of the dielectric substrate 2 and the second metal short-circuit pin 6, and the section size of the antenna is reduced. Principle for realizing circular polarization characteristic: changing TM by adjusting first metal shorting pin 40,1/2Resonant frequency point of mode using two orthogonal modes TM0,1/2Mode and TM1,1/2The mode realizes circular polarization.
Example 2, the effect of the present invention will be described in detail with reference to the simulation.
1. Emulated content
Please refer to fig. 3 to fig. 7. The port reflection coefficient, antenna pattern and gain of the antenna in example 1 were simulated using simulation software.
2. Simulation result
Fig. 3 is a reflection coefficient curve diagram of the ultra-thin half-wall short-circuit circular polarization top end radiation antenna port of the invention, and fig. 4 is an axial ratio curve diagram of the ultra-thin half-wall short-circuit circular polarization top end radiation antenna of the invention, and it can be seen that the frequency band with the port reflection coefficient lower than-10 dB is 2.69 GHz-2.84 GHz, accounts for 5.4%, and the 3dB axial ratio bandwidth is 2.76 GHz-2.80 GHz, accounts for 1.4%. The characteristic of circular polarization of the antenna is well realized, and the requirement of a satellite navigation system on the circular polarization can be met.
Fig. 5 shows the Phi =90 ° plane directional diagram of the ultra-thin half-wall short-circuit circularly polarized top radiating antenna of the present invention at a low frequency of 2.78GHz, and fig. 6 shows the Phi =0 ° plane directional diagram of the ultra-thin half-wall short-circuit circularly polarized top radiating antenna of the present invention at a low frequency of 2.78GHz, and it can be seen that the antenna has a stable top radiating directional diagram, and the half-power beam width reaches 110 degrees, which is advantageous for being applied to a satellite communication system.
FIG. 7 shows the gain variation of the ultra-thin half-wall short-circuited circularly polarized top-radiating antenna port of the present invention, which indicates that the gain is greater than 4dBic within the axial ratio bandwidth of 3dB from 2.76GHz to 2.80GHz, and the gain is in accordance with the size of the antenna.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides an ultra-thin half wall short circuit circular polarization top radiation antenna which characterized in that: comprises a rectangular radiation microstrip patch (1), a dielectric substrate (2), a metal bottom plate (3), a first metal short circuit pin (4) and a radio frequency connector (7), the rectangular radiation microstrip patch (1) is attached to one side surface of the dielectric substrate (2), the other side surface of the medium substrate (2) is fixedly connected with the metal bottom plate (3), the first metal short circuit pins (4) are provided with four metal short circuit pins which penetrate through the rectangular radiation microstrip patch (1), the dielectric substrate (2) and the metal bottom plate (3) and are connected with the metal bottom plate (3), the radio frequency connector (7) is arranged on the other side of the metal bottom plate (3) opposite to the medium substrate (2), a coaxial probe (8) in the radio frequency joint (7) penetrates through the medium substrate (2) and is connected with the rectangular radiation microstrip patch (1) in a welding manner;
the rectangular radiation microstrip patch (1) is provided with a linear groove (5) with the length of 0.15 lambda, and no metal element is arranged in the linear groove (5);
the dielectric substrate (2) is a substrate sheet based on the forming principle of a substrate integrated waveguide, and a row of second metal short circuit pins (6) are arranged on the dielectric substrate (2) along the edge of the rectangular radiation microstrip patch (1);
the thickness of the dielectric substrate (2) is less than 0.028 lambda;
the length of the rectangular radiating microstrip patch (1) is 0.46 lambda, and the width of the rectangular radiating microstrip patch is 0.23 lambda;
the radius of the first metal short circuit pin (4) is 1.2mm, and the distance between the first metal short circuit pin and the first metal short circuit pin is set to be 0.5 mm.
2. The ultra-thin half-wall short-circuit circularly polarized top radiating antenna as claimed in claim 1, wherein the outer layer of said rf connector (7) is fixedly connected to said metal base plate (3).
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| CN201910769229.4A CN110492242B (en) | 2019-08-20 | 2019-08-20 | Ultra-thin half-wall short-circuit circularly polarized top radiation antenna |
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| CN201910769229.4A CN110492242B (en) | 2019-08-20 | 2019-08-20 | Ultra-thin half-wall short-circuit circularly polarized top radiation antenna |
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| CN110492242A CN110492242A (en) | 2019-11-22 |
| CN110492242B true CN110492242B (en) | 2020-08-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111342223B (en) * | 2020-03-06 | 2023-06-23 | 内蒙古显鸿科技股份有限公司 | Buried antenna device and communication system |
| CN112310663B (en) * | 2020-09-18 | 2021-10-26 | 西安电子科技大学 | Broadband low-profile dual-frequency multi-beam patch antenna based on multi-mode resonance |
| CN112421236B (en) * | 2020-10-14 | 2022-05-17 | 西安电子科技大学 | Coplanar antenna capable of directionally radiating along surface of carrier |
| CN113193371B (en) * | 2021-04-30 | 2022-10-21 | 西安电子科技大学 | Miniaturized high-isolation circularly polarized diversity antenna based on dual-mode resonance |
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