Ka-band Six-Port Network Using Double Ridge Gap Waveguide Technology

For microwave and millimeter-wave measurement, a six-port network based on double ridge gap waveguide (DRGW) is proposed, and it is the first attempt to design the six-port network by using gap waveguide technology. In this work, DRGW power divider and DRGW 90 degrees - 3 dB coupler are regarded as the basic elements, and they are designed by DRGW according to the schematic diagram. By simulation, the six-port network is designed to operate at 40 GHz with the fractional bandwidth of 8.5%, and performance indicators of phase and amplitude between different ports are satisfied with design requirements.