Magic tee is a widely used component in microwave systems; the four arms of conventional magic tee direct at four different directions, which give inconveniences to the assemblage of a system. In this paper, a narrow-wall slot directional coupler and an E-plane dielectric loaded waveguide phase shifter is used to form a magic tee with four arms in the same H-plane. The magic tee is analyzed with mode matching method; Simulation results are presented, which show good performance. A fourhorn monopulse antenna feed system composed of this kind of magic tee and the broad-wall slot directional coupler based magic tee is presented, and this kind of system is more compact than a traditional monopulse antenna feed system.
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