The SYBD-18-172HP+ from Mini Circuits is a Bi-Directional Coupler with Frequency 1.4 to 1.75 GHz, Coupling 18.57 to 20.26 dB, Average Power 25 to 50 W, Power 25 to 50 W, Insertion Loss 0.09 to 0.13 dB. Tags: Surface Mount. More details for SYBD-18-172HP+ can be seen below.