The SMI-3783H from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 3.7 to 8.3 GHz, Insertion Loss 1 dB, Isolation 34 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-3783H can be seen below.