Analysis and design of a 30 GHz printed ridge gap Ring-crossover

Nowadays there is much interest in working at the millimeter wave range. Crossover is an important component in microwave systems and beam forming networks. In this paper, a planar simple design crossover is presented with analytical analysis. It is built using the printed ridge gap technology which has low dielectric losses as the wave propagated mainly in an air gap region. The crossover has a bandwidth of 0.5 GHz (from 29.75 to 30.25 GHz) with insertion loss less than 0.6 dB and the isolation and return loss are better than 15 dB.