Dual Band Circularly Polarized Dielectric Resonator Antenna using DSWPD with Phase Shifter for IRNSS

Abstract

Compact dual band circularly polarized rectangular dielectric resonator antenna (CPRDRA) using dual section Wilkinson power divider (DSWPD) with wideband 90° phase shifter is investigated for Indian Regional Navigation Satellite System (IRNSS) applications. In this paper, a ground plane area of dual band CPRDRA is miniaturized using high dielectric constant εr= 51.92 of ceramic dielectric resonator and high dielectric constant εr= 10.2 of Rogers R03210 dielectric substrate. The compact ground plane area of dual band CPRDRA is 40 x 40 mm2 and is designed to operate in L5-band- 1.164 to 1.188 GHz with lower band resonant frequency of 1.176 GHz and L1-band- 1.565 to 1.585 GHz with upper band resonant frequency of 1.575 GHz. The simulation and measurement of dual band CPRDRA return loss (RL), right hand circular polarization (RHCP)-left hand circular polarization (LHCP) realized gain and axial ratio (AR) are given in this paper. Simulated and measured RL is better than 10 dB in L5-L1 bands. RHCP in dual band CPRDRA is generated using DSWPD with wideband 90° phase shifter. In broadside direction, dual band CPRDRA RHCP realized gain is higher than the LHCP realized gain by 20 dB. The dual band CPRDRA RHCP realized gain is 1.7 dB at zenith. The compact dual band CPRDRA AR is better than 3 dB from zenith to ±45° at phi=0°, 45° and 90°.