Round polarization short rear radiation antenna with spiral feedback source

Abstract

The invention discloses a circular polarization short backfire antenna with spiral feed source with higher broadband characteristic and smaller using volume from wireless communication antenna field, which comprises a master reflector (1), a sub-reflector (2), a feed source (3), as well as an assisting support (2); the feed source (3) comprises a helical antenna (31) and a feed point allocation device (32); the helical antenna (31) is coiled on the assisting support (2), one end is fixed with the assisting support (2), and the other end is connected with a signal output cable (5) through the feed point allocation device (32). Through adopting the helical antenna as the feed source of backfire antenna, the invention realizes the broadband and circular polarization of the antenna, meanwhile, the invention uses the helical wire to support and replace the special shaft, and to be connected with main parts of the antenna, thereby simplifying the antenna structure, reducing complexity of antenna processing technology, so as to benefit the mass production of the antenna.

Description

technical field [0001] The invention relates to wireless communication antenna technology, in particular to the technical field of circularly polarized antennas with high requirements on broadband characteristics and small volume. Background technique [0002] The short backfiring antenna is used in occasions where the antenna size is required to be small, and generally consists of a main reflector, a sub-reflector, a feed source and an auxiliary support. Its working principle is that the electric wave is reflected back and forth between the main and secondary reflectors, and every time it is reflected, a part of the energy is radiated from the secondary reflector. The existing short backfiring antennas mainly use symmetrical elements, crossed dipoles and waveguides as feed sources. [0003] When the symmetrical element and crossed dipole are used as the feed source of the antenna, the impedance bandwidth of the antenna is determined to be narrow due to the resonance charac...

AI Technical Summary

Problems solved by technology

[0003] When the symmetrical element and crossed dipole are used as the feed source of the antenna, the impedance bandwidth of the antenna is determined to be narrow due to the resonance characteristics of the symmetrical element and the dipole itself. When the waveguide is used as the feed source, the structure of the antenna is relatively complicated. , S and C band feed point waveguide size is larger

In the patent of a modified backfiring antenna with the patent number ZL92203292.0, the working bandwidth of the antenna is increased by adding a corrugated ring around the main reflector, but the processing of the corrugated ring is relatively complicated, which affects the manufacturability of the antenna ; In addition, in this patent, the corrugated ring and the surrounding edge and the surrounding edge and the conical reflector are connected by welding, which affects the consistency of the antenna performance

In patent No. ZL01250096.8, a wide-band high-gain circularly polarized antenna patent, the helical radiator, the back-firing cavity and the converter are connected through a special shaft, and the antenna structure is complicated; in addition, the back-firing cavity is composed of a cavity Composed of built-in load ring, the production cost of the antenna is relatively high

[0004] In the 2002 Vol.23 No.2 "Guidance and Fuze" article "A Novel Design of a Waveguide-fed Short Backfire Antenna", Qiu Jinghui from Harbin Institute of Technology and others proposed to carry out the sub-reflector of the short backfire antenna The improvement of conicity increases the gain of the antenna, but the volume of the antenna is relatively large

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