The DDC188192-4 from DEEWAVE Electronics is a RF & Microwave Circulator with Frequency 1.88 to 1.92 GHz, Average Power Forward 30 W, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for DDC188192-4 can be seen below.