The 15TM108 from Smiths Interconnect is a Waveguide to Coax Adapter with Frequency 7.1 to 8.5 GHz, Power 70 W, Insertion Loss 0.2 dB, Operating Temperature -25 to 85 Degree C(Acceptance), Storage Temperature -60 to 100 Degree C. More details for 15TM108 can be seen below.