摘要:
本文介绍一种简便、快速、直观的检验支撑杆型衰减器匹配性能的方法。它的基本原理是在微波频率上测绘被测衰减器的相对衰减量分布曲线,再用相移法测量反映衰减器渐变段匹配程度的电压驻波比S,对比分析所得曲线和S值,确定对曲线的形状及其起始段斜率的要求。此要求确定后,在检验衰减器时,只需测绘它的微波相对衰减量分布曲线看是否符合要求即可。采用这种方法大大提高了测试速度。实践证明,这种方法不仅在研制行波管中起了一定作用,还可以作为小批量生产工艺流程中检验衰减器的有用手段。
Abstract:
A simple, rapid, directly observable method for examining the supporting rod type attenuator s matching property is discussed. The fundamental principle employed is to measure and work out the relative attenuation distribution curve of the attenuator at microwave frequencies, and then by phase shift method to measure the VSWR S, value as an indication of matching quality of the attenuator in its region of slow variation in attenuation, compare and analyse the obtained curve and the S value in order to determine required form of the curve and slope of the starting section. When these are established, in further examination work on attenuators all one needs to do is just to measure and work out an attenuator's microwave relative attenuation distribution curve to see if it meets the requirement established. By adopting this method, one increases greatly the rapidity of measurement. From experimence, we can say that this method is not only useful in the development research work on TMT, but is useful on a small scale manufacturing of TMT's .