Design of Broadband circularly polarized antenna array

Abstract

A broadband circularly polarized antenna array is presented in this paper. An open-loop antenna revolving laid in the array is chosen as the radiating elements to achieve a better wide-angle axial ratio and suit the distribution of CMOS chips and circuit in T/R modules built in tile. The proposed array achieves 12.5% bandwidth and radiation efficiency greater than 90% across the entire band-width. A 6*4 prototype was fabricated and tested to validate the design.