Abstract

Multipactor caused by the secondary electron emission phenomenon, has been a bottle neck problem for high-power satellite components. In this paper we report a metal material with low secondary electron emission yield, tantalum. The secondary electron emission yield of tantalum was calculated by Casino when the electron beam is perpendicularly incident on a smooth tantalum surface. Moreover, the low secondary electron emission characteristic of tantalum was preliminarily verified by contrast analysis of gold and silver. The multipactor thresholds of the Ku-band impedance transformers of silver and tantalum are analyzed and compared by CST. The simulation results further validated the application possibility of tantalum in microwave components and its advantages in the field of multipactor suppression.

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