The ATc10-20 from Narda-ATM is a RF & Microwave Circulator with Frequency 10 to 20 GHz, Average Power Forward 2 W, Peak Power 30 W, Insertion Loss 0.6 to 0.7 dB, Isolation 16 to 17 dB. Tags: Coaxial Circulator. More details for ATc10-20 can be seen below.