A radial waveguide power divider for Ka band phased array antennas

A Ka band radial waveguide power divider has been designed for two-dimensional scanning phased array antennas. A measured result of 24% frequency bandwidth has been obtained for -20 dB return loss. Simulated results shows that the coupling amount of energy from a radial waveguide power divider to phase shifters can be controlled to meet the sidelobe requirements. Sensitivity studies for the coupling shows the tolerable amplitude errors for mass production. The coupling design results need to be verified by measurement results.