A Thermal Analysis Method for Dielectric Supported Ring-bar Meander Line Slow Wave Structure

The thermal characteristics are important for the proper operation of the high-power traveling wave tube (TWT). And they are affected by internal thermal losses, which mainly come from high-frequency loss and electron interception loss. The high-frequency loss can be calculated by setting the material of the slow wave structure (SWS) as PEC and lossy, respectively, and combining the power flow curve. Taking the thermal loss as heat source and processing the SWS in sections, the temperature distribution of the SWS can be obtained by thermal simulation, in which the thermal contact conductance has a greater influence on the maximum temperature.