A Novel Magic-T Based on Hybrid Integration Technology of Planar Circuits and NRD-Guide

In this paper a novel magic-T based on the hybrid planar/nonradiative dieletric (NRD) waveguide integrated technology is proposed. The H-plane power divider of the magic-T is made up of four square quarter mode substrate integrated waveguide (QMSIW). An integrated transition of microstrip line to nonradiative dielectric guide is utilized to realize the difference port of the magic-T. The integration between two different structures is achieved by aperture coupling. Simulated results show that the hybrid planar magic-T presented in this paper promises to be useful in the design of future microwave and millimeter wave circuits and systems.