The SMI-1722 from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 17 to 22 GHz, Average Power Reverse 2 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-1722 can be seen below.