多节λ/4阻抗变换器的频率特性与变换比  

Frequency Characteristics and Conversion Ratio of Multi-sectionλ/4 Impedance Converter

作　　者：贺昌辉[1] 张迪 陈一畅 肖慧 HE Changhui;ZHANG Di;CHEN Yichang;XIAO Hui(Air Force Early Warning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《电气电子教学学报》2023年第6期224-226,共3页Journal of Electrical and Electronic Education

基　　金：国家自然科学基金青年基金(62201614)。

摘　　要：多节λ/4阻抗变换器是微波工程中一种常用的匹配元件,能很好地改善频率特性,且变换比不同,改善的程度也不同,但一般教材却没有详细分析这一结论,容易引起读者的困惑。基于此,对两节λ/4阻抗变换器的频率特性与变换比进行了理论推导与仿真分析,在验证其频率特性的同时,找到仅与负载有关的最佳变换比使得多节λ/4阻抗变换器具有最佳频率特性,为宽带阻抗变换器的快速设计提供依据。Multi-section λ/4 impedance converter is a common matching element in microwave engineering,which can improve the frequency characteristics very well,and the degree of improvement varies with the conversion ratio.However,this characteristic is not analyzed in detail in general textbooks,which is easy to cause confusion for readers.Based on this,the frequency characteristics and conversion ratio are theoretically deduced and simulated for a two-sectionλ/4 impedance converter.While verifying its frequency characteristics,an optimal conversion ratio related to load is also found to make the impedance converter have the best frequency characteristic,which provides the basis for the fast design of broadband impedance converter.

关 键 词：多节 λ /4阻抗变换器 频率特性 变换比 

分 类 号：TN624[电子电信—电路与系统]