The ADC-20-4-75R+ from Mini Circuits is a Directional Coupler with Frequency 40 MHz to 1 GHz, Coupling 19.86 to 20.74 dB, Directivity 16.53 to 24.90 dB, Power 1 W, Average Power 1 W. Tags: Surface Mount. More details for ADC-20-4-75R+ can be seen below.