最小失配网络的理论研究

项目名称： 最小失配网络的理论研究

项目编号： No.50877004

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 电工技术

项目作者： 朱义胜

作者单位： 大连海事大学

项目金额： 32万元

中文摘要： 双端接载滤波器或匹配网络的设计必须考虑传输特性对负载变化的灵敏度，能否设计出对终端阻抗变化不灵敏的匹配网络，我们称之为"最小失配网络的理论研究"。研究工作包括：如何定义最小失配网络，有没有解？在什么样的条件下有解析解，如何去解？宽带匹配问题的负载是频变的（frequency dependent），最小失配网路研究的负载是时变的。在此意义上可以把最小失配网络看成宽带匹配理论的延伸和发展。最小失配网络设计用到数字优化技术，该问题可以处理为二维空间的优化问题：假定优化的电路拓扑结构给定，（以后的研究可开拓到不同的网络拓扑结构）, 优化的目标函数是输入端口反射系数的模,被优化参数是归一化网络参数g1,g2,…gn ；优化的频率区间是[f1,f2]，负载的变化范围是[z1,z2] ，设计最小匹配网络是一科学问题，有理论研究的可能；其成果也有广泛的应用价值。

中文关键词： 最小失配网络；宽带匹配；多维系统；最优化算法

英文摘要： The design of a two-port networks, filter and matching network must take into account of the sensitivity of transducer power gain (TPG) with respect to the load. This project studies the variation of load affects TPG, and to design an impedance matching network insensitive to the load change, we call it "the minimum mismatch network theoretical research." Research includes: How to define the minimum mismatch network, is there solution? In what conditions are there analytical solutions and how to design a minimum mismatching network? In broadband matching theory, it is required to design a network which yields a prescript TPG when its ports are terminated in frequency dependent load. While the terminated loads are time varying in the minimum mismatching network. In this meaning, the design of a minimum mismatching network is the extension of the broadband matching theory. The design of minimum mismatch network may use digital technology, the problem can be dealt with the optimization problem in two-dimensional space: the assumption that the optimized structure of a given circuit topology, (after the study could open up to a different network topology), the objective function is the modulus of the input reflection coefficient, the parameters to optimize are normalized network parameters [g1, g2,… gn]; the frequency range of searching is [f1, f2], the load range is [z1, z2]. The study of the matching the minimum mismatching network has scientific significant and the results have wide application.

英文关键词： minimum matching network; broadband matching network; multi-dimensional system; optimization;