A novel approach to improve performance of Ka-band hybrid for SATCOM application

This paper proposes a novel method for realization of tuning less Ka-band Hybrid with enhanced RF performance compared to conventional approach of realizing microstrip circuits (Hybrid). This is a first time that we have developed a tuning less 3-dB quadrature hybrid. This hybrid is a single section branch line coupler designed and developed at 29.5 to 30.0GHz. The amplitude imbalance over the band is 0.2dB with a very good phase imbalance. This paper provides an excellent practical solution to improve the RF performance of microstrip circuit operating at high frequency. Furthermore, the paper will compare the improvement in RF performance of new approach with the conventional approach and address the factors leading to improvement of RF performance.