The CSM-20-1.17G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 650 to 1700 MHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±1.2 dB, Directivity 19 dB. Tags: Module with Connectors. More details for CSM-20-1.17G SQ can be seen below.