The CTM-20M-12G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 6000 to 18000 MHz, Coupling 20 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.60 dB, Directivity 15 dB. Tags: Module with Connectors. More details for CTM-20M-12G can be seen below.