The QCC3538X from Qualwave is a RF & Microwave Circulator with Frequency 300 to 1850 MHz, Bandwidth 500 MHz, Average Power Forward 100 to 300 W, Insertion Loss 0.25 to 0.70 dB, Isolation 17 to 25 dB. Tags: Module with Connector, Coaxial Circulator. More details for QCC3538X can be seen below.