The S145D-WR28 from Unique Broadband Systems is a Waveguide Coupler with Frequency 26.5 to 40 GHz, Coupling 20 dB, 30 dB, 40 dB, 50 dB, 60 dB, Directivity 20 dB. Tags: Dual Directional Coupler, Crossguide Coupler. More details for S145D-WR28 can be seen below.