The RC3538XS-1.1-1.35 from ZTS Technologies is a RF & Microwave Circulator with Frequency 1.1 to 1.35 GHz, Average Power Forward 100 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -10 to 60 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC3538XS-1.1-1.35 can be seen below.