Novel Design of Stacked Dual Layer Strip Lines Fed Wideband Patch Antenna for GNSS Application

This paper presents a novel design of stacked dual layer strip lines fed patch antenna. The wideband characteristics can be achieved by employing approximate L-probes coupling feeding schemes. Dual layer strip lines which are composed of one broadband 180 - hybrid and two wideband 90 - hybrids are introduced as feeding network in this design. As a result, the designed antenna has a 59.4% 10-dB input re∞ection coe-cient bandwidth and 48.3% 3-dB axial ratio (AR) bandwidth relative to the center frequency respectively. The designed antenna occupies a compact size of 80mm£80mm£32mm. The flnal antenna provides a very good circularly polarized radiation for Global Navigation Satellite System applications including GPS, GLONASS, Galileo and Compass.