Design and implementation of a six-port junction based on substrate integrated waveguide

Abstract

A six-port junction based on substrate integrated waveguide technology with high reliability and efficient performance is proposed in a sub-K-band of 21 23.5 GHz. This substrate integrated waveguide (SIW) six-port junction is constructed from three directional couplers and one T-junction power divider as fundamental components in SIW form, where using appropriate via techniques led to 6 dB coupling coefficients and 15 dB return loss. There is good agreement between the simulation and the measurement results.