The WFI 140-220 | 04800022 from Radiometer Physics GmbH is a Waveguide Isolator with Frequency 140 to 220 GHz, Insertion Loss 1.7 dB, Power 0.1 W (20 dBm), Isolation 20 dB. Tags: Faraday Isolator. More details for WFI 140-220 | 04800022 can be seen below.