宽带匹配网络中参量法与盖维茨法的数值误差研究  

Numerical error study on parametric approach and Gewertz procedure in designing broadband matching network

作　　者：郭世桦 阎敬业[1,2] 吴季[2] 

机构地区：[1]中国科学院微波遥感技术重点实验室,北京100190 [2]中国科学院国家空间科学中心,北京100190 [3]中国科学院大学,北京100190

出　　处：《电子设计工程》2016年第24期119-121,126,共4页Electronic Design Engineering

摘　　要：在宽带电路以及宽带天线设计中经常需要设计宽带匹配网络,传统解析方法只针对简单负载有效。与解析方法不同,数值方法可以在知道负载实频数据的条件下进行宽带化设计。本文对数值方法中常用的参量法与盖维茨法来构成最小函数的问题进行了理论分析与数值编程,比较了两者在生成最小阻抗函数上的误差大小,且分析了两者产生误差的原因。结果表明,对于阶数比较低的情况,采用参量法和盖维茨法均可行且两者误差几乎相等;但是对于阶数比较高的情况,参量法比盖维茨法的数值误差小几个数量级,这对于设计宽带匹配网络具有很大的指导意义。In broadband circuits design and broadband antenna design,there often occurs problem like designing a broadband matching network.There are usually two methods,traditional analysis method and numerical method.For analysis method,it is only apply for simple load effectively.However,we always need to design a broadband networks under the condition that we have several impedence values at some specfic frequency,numerical method can easy deal with it. In numerical method ,there is a need to generate a minimal function based on the odd part, parameter approach and Gewertz procedure are usually used. In this paper, we carry on the theoretical analysis and numerical programming ,the error between those two methods are compared,and causes of the error are also analyzed.Results show that in the case of low order, two methods are both feasible and almost equal error.But in the case of high order,the error caused by parametric approach is several orders of magnitude smaller than Gewertz procedure.This result has great guiding significance in designing broadband matching network.

关 键 词：宽带匹配网络 参量法 盖维茨法 网络分析与综合 

分 类 号：TN711[电子电信—电路与系统]