The WTA 90-140 | 4700054 from Radiometer Physics GmbH is a Waveguide Attenuator with Frequency 90 to 140 GHz, Average Power 0.1 W, Attenuation 0 to 40 dB, Insertion Loss 0.2 dB. Tags: Calibrated Attenuator. More details for WTA 90-140 | 4700054 can be seen below.