Miniaturized top-loaded double-frequency quadrifilar helix antenna and working method thereof

Abstract

The present invention relates to a miniaturized top-loaded double-frequency quadrifilar helix antenna and a working method thereof. The miniaturized top-loaded double-frequency quadrifilar helix antenna comprises a radome, a helix antenna main body, a feed network and active amplification circuit, a shielding cavity, a pedestal and a coaxial lead. One end of the coaxial lead is in contact connection with the feed network and active amplification circuit, and the other end of the coaxial lead is connected with a receiving module; the feed network and active amplification circuit is connected with the helix antenna main body; the radome is detachably connected with the pedestal up and down; the shielding cavity is connected with the feed network and active amplification circuit; the helix antenna main body comprises two sets of quadrifilar helix antennas, wherein the first set of quadrifilar helix antenna is configured to excite low frequency, and the second set of quadrifilar helix antenna is configured to excite high frequency; and each set of quadrifilar helix antenna is formed by spiralling four spiral arm units with the same structure at intervals in the same direction. The miniaturized top-loaded double-frequency quadrifilar helix antenna and the working method thereof are compact in structure, expand working frequency bands without increasing the volume of the antenna, improve the gain bandwidth and achieve miniaturization.

Description

technical field [0001] The invention belongs to the field of satellite navigation antennas, in particular to a miniaturized top-loaded dual-frequency four-arm helical antenna and a working method thereof. Background technique [0002] In the field of satellite navigation and positioning, antennas have been widely used in satellite communication fields such as GPS and Beidou, especially the microstrip structure and spiral structure, which have penetrated into various fields of satellite positioning and communication. Due to the disadvantages of large volume, narrow bandwidth, and small beam width, microstrip antennas cannot meet the miniaturization market. The helical antenna has attracted much attention due to its light weight, small size, and large beam width. [0003] At present, four-arm helical antennas are widely used in the field of satellite communications. Traditional four-arm helical antennas are mostly single-frequency, and dual-frequency generally adopts two sing...

AI Technical Summary

Problems solved by technology

The dual-frequency antenna is designed by stacking up and down, which not only increases the size of the antenna, but also makes debugging difficult, which is not conducive to miniaturization applications

Although the dual-frequency antenna with inner and outer nested structure does not increase the antenna volume, the inner and outer helical arms affect each other, resulting in low antenna gain and narrow bandwidth

Images