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本文对微波宽带阶梯阻抗变换器,在规定的带宽内,采用最优化计算方法,以快速电子计算机作为工具,使阻抗变换器最大输入反射系数最小化,从而获得最佳宽带多级阶梯阻抗变换器优化设计的通用计算程序。该程序可作为一般级联无补偿传输线网络的优化设计程序。在阶梯长度等于1/4波长的特殊情形下,所得结果即成为切比雪夫型设计。本文改进了一维搜索的DSC法,克服了现有算法的弊病,使迭代过程稳定地收敛。作为例子,本文还具体给出阻抗变换比为R=10:1,工作频带为1500MHz～4500MHz的二～五节阶梯阻抗变换器优化设计的数值结果。
In this paper, the microwave broadband ladder impedance converter, within the specified bandwidth, the use of optimal calculation method to fast electronic computer as a tool to minimize the maximum input impedance of the impedance converter, so as to obtain the best broadband multi-stage ladder impedance converter Optimized design of the general calculation procedures. The program can be used as a general cascade of uncompensated transmission line network optimization design process. In the special case where the step length is equal to 1/4 wavelength, the result becomes Chebyshev type design. This paper improves the one-dimensional search of the DSC method to overcome the shortcomings of the existing algorithms, the convergence of the process of convergence. As an example, the numerical results of two-five-step ladder impedance converter with impedance conversion ratio of R = 10: 1 and operating frequency band of 1500MHz ~ 4500MHz are given.