The ADC190DE from ADMOTECH is a RF & Microwave Circulator with Frequency 1.89 to 1.91 GHz, Average Power Forward 50 W, Average Power Reverse 30 W, Insertion Loss 0.45 to 0.55 dB, Isolation 18 to 20 dB. Tags: Drop-in Circulator. More details for ADC190DE can be seen below.