The DC1600M1800B40C20PN-01 from Dyne Tech is a Directional Coupler with Frequency 700 MHz to 2.5 GHz, Coupling 40 dB, Coupling Variation ±1.5 dB, Directivity 18 dB, Average Power 20 W. Tags: Module with Connectors. More details for DC1600M1800B40C20PN-01 can be seen below.