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