The SMC-1530 from Sierra Microwave Technology is a RF & Microwave Circulator with Frequency 1.5 to 3 GHz, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature 10 to 40 Degree C, Storage Temperature 10 to 40 Degree C. Tags: Coaxial Circulator. More details for SMC-1530 can be seen below.