The FMWCA1104 from Fairview Microwave is a Waveguide to Coax Adapter with Frequency 26.5 to 40 GHz, Power 20 W, Insertion Loss 0.4 dB, Operating Temperature -20 to 70 Degree C, Storage Temperature -40 to 85 Degree C. More details for FMWCA1104 can be seen below.