The ATc1.70-2.20 from Narda-ATM is a RF & Microwave Circulator with Frequency 1.7 to 2.2 GHz, Average Power Forward 10 W, Peak Power 500 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for ATc1.70-2.20 can be seen below.