The JC2C1805T1990S10 from JQL Electronics is a RF & Microwave Circulator with Frequency 1.8 to 1.99 GHz, Average Power Forward 100 W, Insertion Loss 0.8 dB, Isolation 40 dB, Operating Temperature -30 to 75 Degree C. Tags: Coaxial Circulator. More details for JC2C1805T1990S10 can be seen below.