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螺旋线慢波结构夹持性能测试方法研究
A testing method for assembled performances of helix slow-wave structure with a supported rod
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摘要: 提出了一种由螺旋线慢波结构热分布特性来获知其夹持性能的方法.设计了基于光纤光栅和热电偶的分布式温度测试平台,计算和分析了光纤光栅等测温元件对慢波结构散热特性的影响.搭建了实验系统,研制了分布式微型光纤光栅温度传感阵列,并对某型X波段行波管慢波结构进行对比测试.结果表明,实验获得的温差曲线可准确判别慢波结构夹持性能的优劣,且不破坏器件结构与性能.Abstract: In this paper, a novel testing method for the assembled performances of the helix slow-wave structure (SWS) with a supported rod is proposed based on heat distribution of SWS. A distributed temperature testing platform using fiber Bragg grating (FBG) and thermocouple is designed, and the influence of thermal sensors on the heat dissipation capability of the SWS is analyzed means of ANSYS. The experimental system including a distributed micro FBG sensor array is set up to test the assembled performance of SWS of the X-band TWT. The results show that the assembled performances of the SWS can be effectively obtained by the tested curve of temperature difference.
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