The ATi19-22 from Narda-ATM is a RF & Microwave Isolator with Frequency 19 to 22 GHz, Average Power 2 W, Average Power Forward 2 W, Peak Power Forward 0.05 kW, Insertion Loss 0.3 to 0.4 dB. Tags: Module with Connector, Coaxial Isolator. More details for ATi19-22 can be seen below.