The MDC20-180400 from Microot Microwave is a Directional Coupler with Frequency 18 to 40 GHz, Coupling 20 ± 0.7 dB, Coupling Variation ± 0.7 dB, Directivity 14 dB, Power 20 W. Tags: Module with Connectors. More details for MDC20-180400 can be seen below.