High-gain dual-mode broadband circularly polarized antenna

A circularly polarized antenna and high-gain technology, which is applied in the field of high-gain dual-mode broadband circularly polarized antennas, can solve the problems of time-consuming feeding network and low antenna gain, etc., and achieve simple structure, convenient design, and high-gain characteristics Effect

Inactive Publication Date: 2017-12-01
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

In recent years, there has been a method to realize a circularly polarized orthogonal dipole antenna through a pair of annular phase-shifting lines, which enables the antenna to obtain a large circularly polarized operating bandwidth, but the antenna gain achieved by this method not very high
The above methods generally require complex feed network or parameter design is very time-consuming

Method used

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  • High-gain dual-mode broadband circularly polarized antenna
  • High-gain dual-mode broadband circularly polarized antenna
  • High-gain dual-mode broadband circularly polarized antenna

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] like Figure 1 to Figure 3 As shown, a high-gain dual-mode broadband circularly polarized antenna provided by the present invention includes four L-shaped radiators 1, two annular phase-shifting lines 2, a dielectric plate 3, a coaxial feeder 4, a metal cavity 5 and Coaxial joint 6, wherein: two L-shaped radiators 1 are arranged on the upper side of the dielectric plate 3 through an annular phase-shifting line 2 near the central area of ​​the dielectric plate 3; the other two L-shaped radiators 1...

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Abstract

The invention provides a high-gain dual-mode broadband circularly polarized antenna. The high-gain dual-mode broadband circularly polarized antenna comprises an antenna radiation portion, a coaxial feed line, a metal chamber and a coaxial joint, the antenna radiation portion comprises a plurality of L-shaped radiators fastened on a dielectric plate, the antenna radiation portion is connected with the coaxial feed line, and the coaxial feed line penetrates through the metal chamber and is connected with the coaxial joint. The high-gain dual-mode broadband circularly polarized antenna is advantageous in that conventional linear orthogonal dipole radiators are replaced by four L-shaped radiators, and the antenna can simultaneously generate two circular polarization work modes so that the circular polarization bandwidth of the antenna can be broadened; the impedance bandwidth is 72.6%, the circular polarization axial ratio bandwidth is 62.5%, and the maximum gain is 12.5 dB; and dual-mode broadband operation of the antenna is realized with the combination of the L-shaped radiators and an annular phase-shift wire, the structure is simple, the design is convenient, single-port feeding is achieved, a complex feeding network is avoided, the characteristic of high gain is achieved, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of circularly polarized antennas, in particular to a high-gain dual-mode broadband circularly polarized antenna. Background technique [0002] With the development of wireless communication technology, communication systems have higher and higher requirements on antenna performance, and traditional antennas can no longer meet the growing demand. In order to improve the reliability of the system, a circularly polarized antenna can be used to replace the traditional linearly polarized antenna. Compared with the traditional linearly polarized antenna, the circularly polarized antenna has many advantages: it can resist the interference to the communication line caused by the multipath effect, it can reduce the energy loss caused by the polarization mismatch during signal transmission, and it can give The higher gain brought about by the communication system also provides more degrees of freedom in the orientation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q15/24H01Q25/04
CPCH01Q1/38H01Q1/50H01Q15/24H01Q25/04
Inventor 任杰梁仙灵贺冲耿军平朱卫仁金荣洪
Owner SHANGHAI JIAO TONG UNIV
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