The SMI-1826 from Sierra Microwave Technology is a RF & Microwave Isolator with Frequency 18 to 26.5 GHz, Insertion Loss 0.6 dB, Isolation 18 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for SMI-1826 can be seen below.