The S145D-WR137 from Unique Broadband Systems is a Waveguide Coupler with Frequency 5.85 to 8.2 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-WR137 can be seen below.