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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。
This article presents a simple, fast and intuitive way to test the matching performance of a support rod attenuator. Its basic principle is to plot the relative attenuation distribution curve of the measured attenuator on the microwave frequency and measure the VSWR S that reflects the matching degree of the attenuator gradual change section by the phase shift method to compare and analyze the obtained curve and the S value, The shape of the curve and its initial segment slope requirements. After this requirement is confirmed, when testing the attenuator, it is only necessary to measure its microwave relative attenuation distribution curve to see if it meets the requirements. This method greatly improves the test speed. Practice has proved that this method not only in the development of traveling wave tube played a role, but also can be used as a small batch production process test attenuator useful tool.