Design and test of gas tight microwave transmission lines for resonance frequency measurements with cavity resonators up to 830 K

In response to the need for a reliable electrical connection between a microwave cavity resonator to be operated at temperatures as high as 800 K and a network analyzer at room temperature, we designed suitable transmission lines. The performance of these lines was tested by measuring resonance frequency around 5 GHz of a cylindrical stainless steel resonator between ambient temperature and 833 K.