The MC2011-30 from Fairview Microwave is a Directional Coupler with Frequency 500 MHz to 1 GHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity 0.75 dB, Directivity 25 dB. Tags: Module with Connectors. More details for MC2011-30 can be seen below.