Design of a hollow-waveguide slot array antenna for a channel sounder excited by a standing wave in the 150 GHz band

We design a hollow-waveguide slot array antenna for a channel sounder in 150GHz. The antenna consists of the feeding part using an E-plane horn and the radiating part using four rectangular waveguides. The reflection suppression wall is installed in a T-junction to broaden the bandwidth. In simulations, the realized gain of the main polarization component is 24.7 dBi and the 3 dB beamwidth in the E-plane is 4.6° at 158 GHz. The reflection is less than -10 dB over 152.9 GHz ~ 161.3 GHz.