Design of Ka-band practical waveguide duplexer

A brief and practical Ka-band compact waveguide duplexer is demonstrated. A new Structure Y junction is designed that can be expand for others duplexer. U-wave and HFSS three-dimensional electromagnetic simulation are used to Co-simulation. The insertion loss in the transmit path was less than 0.5dB. Final simulation results agreed well with the measured results certified to practicability and accuracy of duplexer.