The ADC200DE from ADMOTECH is a RF & Microwave Circulator with Frequency 1.8 to 2.2 GHz, Average Power Forward 50 W, Average Power Reverse 30 W, Insertion Loss 1 to 1.2 dB, Isolation 13 to 15 dB. Tags: Drop-in Circulator. More details for ADC200DE can be seen below.