The RCPL-2-18-Xd-Sf-10W-M1-w18 from Raditek is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 10 to 20 dB, Coupling Variation ±1.25 dB, Directivity 10 to 20 dB, Average Power 10 to 30 W. Tags: Module with Connectors. More details for RCPL-2-18-Xd-Sf-10W-M1-w18 can be seen below.