The OH-T-20180-20 from A-Info is a Directional Coupler with Frequency 2.0 to 18.0 GHz, Coupling 20 dB, Coupling Variation ±0.50 dB, Directivity 15 dB, Average Power 20 W. Tags: Module with Connectors. More details for OH-T-20180-20 can be seen below.