The RFDC5M18G10N from RF-Lambda is a Directional Coupler with Frequency 500 MHz to 18 GHz, Coupling 9 to 10.5 dB, Frequency Sensitivity ±0.7 to ±1 dB, Directivity 10 to 18 dB, Average Power 30 W. Tags: Module with Connectors. More details for RFDC5M18G10N can be seen below.