微波自动阻抗匹配系统的研究

匹配问题是微波系统中的一个重要环节.传统微波阻抗匹配技术很难对动态负载做到实时、快速、稳定的匹配,限制了微波系统在很多领域的应用.本文构建了一个能为大功率微波系统的动态负载提供匹配的自动阻抗匹配系统.此系统可以为负载尤其是动态负载提供快速、稳定、可重复的匹配,自动将反射系数稳定在工程理想值,从而实现微波功率的最佳传输.在构建了自动阻抗匹配系统的基础上,本文提出了一种快速匹配方法.通过仿真将销钉插入位置的深度与端口面上的等效阻抗联系起来,使得不同销钉插入深度值与端口阻抗值形成对应关系.在微波系统中,利用该对应关系可以快速实现阻抗匹配.

Research on microwave automatic impedance matching system

Matching is a significant aspect in the microwave systems.It is difficult for traditional microwave impedance matching technique to provide a simultaneous,rapid and stable matching,which largely limits the application of the microwave system in many fields.In this paper,it introduces an automatic impedance matching system that can accomplish matching for the dynamic load impedance in high-power microwave system.The system can accomplish simultaneous,rapid,stable and repeatable matching for the load impedance,especially for the dynamic load impedance.At the same time,it maintains the reflection coefficient at the desired value so that the microwave transmission is at its best.Based on the automatic impedance matching system mentioned,this paper puts forward a rapid matching approach.Choosing simulation method,depth of the penetration position of the dowels and equivalent impedance of the surface of the port are related,and form a coincidence relation between different depth value of penetration and impedance value of the port.Especially,the coincidence relation could be used to accomplish impedance matching rapidly in the microwave system.