The S145-WR42 from Unique Broadband Systems is a Waveguide Coupler with Frequency 18 to 26 GHz, Coupling 20 dB, 30 dB, 40 dB, 50 dB, 60 dB, Directivity 20 dB. Tags: Directional Coupler, Crossguide Coupler. More details for S145-WR42 can be seen below.