The X4C20F1-30S from TTM Technologies is a Directional Coupler with Frequency 1.4 to 2.7 GHz, Coupling 30 dB, Coupling Variation ±1.5 dB, Directivity 20 to 23 dB, Average Power 100 W. Tags: Surface Mount. More details for X4C20F1-30S can be seen below.