The SMI-1517H from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 1.5 to 1.7 GHz, Insertion Loss 0.8 dB, Isolation 40 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-1517H can be seen below.