The FMCR1020 from Fairview Microwave is a RF & Microwave Circulator with Frequency 4 to 8 GHz, Average Power Forward 10 W, Average Power Reverse 10 W, Peak Power 20 W, Insertion Loss 1.1 dB. Tags: Coaxial Circulator. More details for FMCR1020 can be seen below.