The DC3008004000GA from Sainty-Tech Communications Limited is a Directional Coupler with Frequency 8 to 40 GHz, Coupling 30 dB, Coupling Variation ±1 to ±1.2 dB, Frequency Sensitivity ±0.6 to ±1 dB, Directivity 12 to 14 dB. Tags: Module with Connectors. More details for DC3008004000GA can be seen below.