SWZ-86398317-10-4B is is a W band, short slot 90 degree hybrid coupler that delivers a 3 dB nominal coupling level and 20 dB typical isolation from 86 to 98 GHz. Across the operation frequency band, the coupler can achieve the magnitude imbalance within ±1 dB, and the phase imbalance within ±3 degrees. The interfaces of the coupler are WR-10 waveguides with UG-387/U-M anti- cocking flanges.