Thermal and structural analysis on output coupler of helix-TWT

Summary form only given, as follows. SMA (Subminiature)-type couplers are widely used in miniTWT as an output power extraction port The coupler is consisted of various materials such as kovar, ceramic, teflon, and monel During the passage of microwave output power through the connector, there is a ohmic loss in the connector, when the microwave output is extracted through it This is a heat source and should be considered in the connector design We have used High Frequency Structure Simulator (HFSS) and Analysis System (ANSYS) codes to carry out the thermal and structural analysis of output connector for helix-TWT. The analytical result shows that the highest temperature appears on the kovar as a center pin and that the most significant stress is on the ceramic window in the output coupler.