The OH-T-180400-20 from A-Info is a Directional Coupler with Frequency 18.0 to 40.0 GHz, Coupling 20 dB, Coupling Variation ±0.40 dB, Directivity 12 dB, Insertion Loss 1.3 dB. Tags: Module with Connectors. More details for OH-T-180400-20 can be seen below.