The C118ka-10 from Narda-ATM is a Directional Coupler with Frequency 18.3 to 20.2 GHz, Coupling 10 dB, Coupling Variation ±0.5 dB, Directivity 13 to 20 dB, Average Power 20 W. Tags: Module with Connectors. More details for C118ka-10 can be seen below.