The CCD18220618G-XX from Cernex Inc is a RF & Microwave Circulator with Frequency 18 to 22 GHz, Bandwidth 1000 MHz, Average Power Forward 10 W, Insertion Loss 0.6 dB, Isolation 18 dB. Tags: Drop-In, Drop-in Circulator. More details for CCD18220618G-XX can be seen below.