The 28WC-50 from A-Info is a Waveguide Directional Coupler that operates from 26.5 to 40 GHz. It has a coupling factor of 50 dB (1 dB coupling accuracy) with directivity of more than 30 dB and an insertion loss of 0.3 dB. The coupler has a mainline VSWR of 1.10:1. It is available in a copper module that measures 203.2 x 19.1 x 38 mm. It has a WR-28 waveguide size and FBP320 (UBR320) flange at the input and output interfaces.