The D3C1020 from DiTom Microwave is a RF & Microwave Circulator with Frequency 10 to 20 GHz, Average Power Forward 5 W, Peak Power 30 W, Insertion Loss 0.6 to 0.7 dB, Isolation 16 to 17 dB. Tags: Coaxial Circulator. More details for D3C1020 can be seen below.