Abstract

A thermal simulation of a novel slow-wave structure (SWS) named planar dielectric-rods-support uniform metallic meander line (PDU-MML) was conducted in this paper, which mainly used in millimeter wave traveling wave tube (TWT). Due to the design idea of using two BN rods to support the metallic line, and coating copper film on metallic line, this new SWS could get a good heat dissipation capability. The simulation results show the temperature of the SWS could remain approximately nearly 100□ when loading 300W microwave power. In addition, the stress analysis results show the mainly stress is concentrate on the interface between the BN rods and metallic line, which is nearly 20.4 MPa.

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