The ATc26.5-40 from Narda-ATM is a RF & Microwave Circulator with Frequency 26.5 to 40 GHz, Average Power Forward 2 W, Peak Power 30 W, Insertion Loss 0.8 to 1 dB, Isolation 14 to 15 dB. Tags: Coaxial Circulator. More details for ATc26.5-40 can be seen below.