The RFDC5M18G30N from RF-Lambda is a Directional Coupler with Frequency 500 MHz to 18 GHz, Coupling 30 dB, Directivity 10 to 12 dB, Average Power 30 W, Insertion Loss 0.8 to 1.2 dB. Tags: Module with Connectors. More details for RFDC5M18G30N can be seen below.