The JDC-20-5+ from Mini Circuits is a Directional Coupler with Frequency 50 MHz to 1.5 GHz, Coupling 20.06 to 20.74 dB, Directivity 20.69 to 34.6 dB, Power 0.5 W, Average Power 0.5 W. Tags: Surface Mount. More details for JDC-20-5+ can be seen below.