Quadifilar helix antenna with cage for axial ratio improvement and wide beam characteristic

Author

Win-Xin Lin ; Qing-Xin Chu ; Sen-Jing Yao

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

fYear

2013

fDate

14-18 April 2013

Firstpage

1

Lastpage

3

Abstract

A simple and novel technique to improve the axial ratio of quadrifilar helix antenna (QHA) and widen its beam width is presented. By adding a cage which consists of a loop and 4 sticks, the axial ratio performance is greatly decreases at the low elevation and the beam width is widened. An antenna for CNSS (Compass Navigation Satellite System, 2.492GHz) application is realized based on the technique. The axial ratio is below 4dB at the elevation of 5° and the 3dB beam width increases to about 180°. Measured results are presented to validate the concept.

Keywords

UHF antennas; helical antennas; satellite antennas; satellite navigation; CNSS; QHA; axial ratio improvement; compass navigation satellite system; frequency 2.492 GHz; quadifilar helix antenna; wide beam characteristic; Antenna measurements; Antenna radiation patterns; Dipole antennas; Global Positioning System; Helical antennas; Antenna radiation pattern; CNSS; axial ratio; circular polarization; helical antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Symposium (IWS), 2013 IEEE International

Conference_Location

Beijing

Type

conf

DOI

10.1109/IEEE-IWS.2013.6616798

Filename

6616798