The CSM-20-1.5G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1000 to 2000 MHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.8 dB, Directivity 25 dB. Tags: Module with Connectors. More details for CSM-20-1.5G SQ can be seen below.