New Design of Compact Shorted Annular Stacked Patch Antenna for Global Navigation Satellite System Application

Abstract

Abstract-A new design of a compact circularly polarized shorted annular stacked patch antenna has been introduced for Global Navigation Satellite System (GNSS) in this paper. The wideband characteristic is achieved by employing L-probe coupled feeding structure. The antenna is fed by four-output-ports strip line feeding network composed of three normal Wilkinson power dividers. As a result, the designed antenna has an effective bandwidth of 94.3% from 0.7 GHz to 1.95 GHz for VSWR < 2, and 57.1% 3-dB axial ratio bandwidth from 1.0 GHz to 1.8 GHz, respectively. The designed antenna has a compact size of 100 mm × 100 mm × 13 mm. The final antenna provides very good circularly polarized radiation for GNSS including GPS, GLONASS, Galileo and Compass.