Circularly Polarized Aperture Coupled Microstrip Short Backfire Antenna with One Ring

ABSTACT A broadband circularly polarized microstrip short backfire antenna(CPMSBA) with one ring corrugated rim used aperture coupled feed method is proposed in this paper. The simulation results verify the circular polarization. The impedance bandwidth of proposed antenna is 0.83 GHz, axial ratio bandwidth bwAR has achieved 2.96%, gain is 9.79 dBi and radiation efficiency is 91.62%.The proposed antenna can be used as a single antenna or as an element of microstrip antenna array. The antenna is designed to operate within KU-band. The antenna has a compact structure and high electrical and mechanical characteristics. Keywords: Aperture coupled, microstrip antenna, back radiation, Circularly Polarized Microstrip Antenna (CPMA)