A High-Gain Circularly Polarized Patch Antenna Using a Circular Ring Reflector for GNSS

Abstract

A design of circular ring reflector is presented to accomplish a high-gain antenna with circular polarization for GNSS application instead of using an LNA. The measured directivity reveals an enhancement of gain by back-lobe reduction. The reflection coefficient, appears -10 dB, is 71.51 %BW from 1.06 to 2.24 GHz. The axial ratio, under the area of 3 dB, is 36.14 %BW over 1.142 - 1.646 GHz. The average gain is 6.86 dBi overall GNSS band, while the maximum gain is 7.43 dBi at 1.314 GHz.