The S147-WR137 from Unique Broadband Systems is a Waveguide Coupler with Frequency 5.85 to 8.2 GHz, Coupling 30 dB, 40 dB, 50 dB, 60 dB, 70 dB, Directivity 25 to 30 dB. Tags: Directional Coupler, Loop Coupler. More details for S147-WR137 can be seen below.