The SMC4037-30 from Fairview Microwave is a Directional Coupler with Frequency 700 MHz to 2.7 GHz, Coupling 6 to 30 dB, Coupling Variation ±0.5 to ±1 dB, Directivity 20 dB, Power 60 W. Tags: Module with Connectors. More details for SMC4037-30 can be seen below.