The DC1800U05-050 from Yantel Corporation is a Directional Coupler with Frequency 1.7 to 2.2 GHz, Coupling 3.8 to 5.1 dB, Directivity 17.7 to 19 dB, Average Power 5 W, Insertion Loss 0.18 to 0.22 dB. Tags: Surface Mount. More details for DC1800U05-050 can be seen below.