The SMC4037-10 from Fairview Microwave is a Directional Coupler with Frequency 700 MHz to 2.7 GHz, Coupling 10 dB, Coupling Variation ±0.8 dB, Frequency Sensitivity 0.7 dB, Directivity 20 dB. Tags: Module with Connectors. More details for SMC4037-10 can be seen below.