In this article, we present a new generic reflectionless filter topology that can be used in designing not only a filter having zero reflection at one port but also a filter having zero reflection at both ports. Detailed mathematical analysis of the presented reflectionless filter topology is provided. The three unique features, which will be described throughout this article, allow us to straightforwardly synthesize a reflectionless filter with ease. Hence, the synthesis procedure does not necessitate using either an optimization technique or a numerical method. This article also presents a rigorous design methodology involving closed-form design formulas for distributed-element filters using the proposed topology. The presented filter topology and design methodology have been verified by designing and fabricating bandpass filters.

中文翻译：

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通用和多功能无反射滤波器拓扑结构及其在分布式元件无反射带通滤波器中的应用

在本文中，我们提出了一种新的通用无反射滤波器拓扑结构，它不仅可用于设计一个端口为零反射的滤波器，还可以用于设计两个端口均为零反射的滤波器。提供了所提出的无反射滤波器拓扑的详细数学分析。这三个独特的功能将在本文通篇介绍，使我们能够轻松地直接合成无反射滤波器。因此，合成过程不需要使用优化技术或数值方法。本文还介绍了一种严格的设计方法，包括使用所提出的拓扑结构的分布式元件滤波器的封闭式设计公式。所提出的滤波器拓扑和设计方法已经通过设计和制造带通滤波器得到验证。