Thermal Analysis of a Helix TWT Slow-Wave Structure
ABSTRACT A novel and effective analytical method using ANSYS has been developed for studying the heat-dissipation capability of a helix traveling-wave-tube slow-wave structure (SWS). This method, which is based on calibrating theoretical calculations with experimental data, is able to precisely predict the SWS heat dissipation, thereby reducing material costs and saving time. The consistency and feasibility of this method have been verified by experimental tests on SWSs using copper-plated helices and both BeO and BN support rods.
Conference Paper: An overview of advances in vacuum electronics in China[Show abstract] [Hide abstract]
ABSTRACT: The research and development of vacuum electronics and microwave vacuum elecrron devices in China started from the 1950's. During the past 50 years, many types of microwave vacuum electron devices have been developed and applied to practical microwave electron systems. The state and art of typical microwave vacuum electron devices in China will present in this paper. Also research and development of common technologies of microwave vacuum electron devices will be introduced.Vacuum Electronics Conference (IVEC), 2011 IEEE International; 03/2011
Conference Paper: Heat dissipation from helical periodic structure in vacuum[Show abstract] [Hide abstract]
ABSTRACT: Two dissimilar metals, not brazed together, give high thermal contact resistance which further enhanced in vacuum if surface finishing is not good enough. Here, the effect of thermal contact resistance of a periodic structure supported with another dielectric material in vacuum has been studied and presented.Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International; 01/2012
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ABSTRACT: A novel helical slow-wave structure is proposed to develop wide-bandwidth, high-gain, high-power millimeter-wave traveling wave tube. This structure evolves from a conventional helical slow-wave structure with three parallel rectangular or other arbitrarily-shaped slots made in the outside of the helix. In this paper, the electromagnetic characteristics and thermal analysis of this structure are obtained using the finite-element-method. From our calculations, the novel and the conventional structure have similar dispersion characteristics, while the novel structure has higher heat dissipation capability than that of conventional one.Millimeter Waves (GSMM), 2012 5th Global Symposium on; 01/2012