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 efiective bandwidth of 94.3% from 0.7GHz to 1.95GHz for VSWR < 2, and 57.1% 3-dB axial ratio bandwidth from 1.0GHz to 1.8GHz, respectively. The designed antenna has a compact size of 100mm £ 100mm £ 13mm. The flnal antenna provides very good circularly polarized radiation for GNSS including GPS, GLONASS, Galileo and Compass.
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