The DNF1900-T0140 from Mercury Systems is a RF & Microwave Circulator with Frequency 1.85 to 1.99 GHz, Bandwidth 141 MHz, Average Power Forward 1 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-in Circulator. More details for DNF1900-T0140 can be seen below.