Recent development of ultra-wideband (UWB) bandpass filters using distributed stub transmission line structures

H. Shaman, Jiasheng Hong
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引用次数: 2

Abstract

A brief review and recent progress in developing ultra-wideband (UWB) filters using distributed stub transmission line structures is reported in this paper. Several advanced UWB filters are demonstrated with electromagnetic (EM) simulated and experimental results. The filters are based on a circuit model for an optimum distributed highpass filter consisting of short-circuited stubs separated by non-redundant connecting lines. It is shown that a cross-coupling between non-adjacent resonators or between the input and output (I/O) feed lines can be implemented to generate new transmission zeros which improve the performance of the stub filters. It is also demonstrated that the uniform connecting lines of the stub filter can be replaced by stepped-impedance lines to suppress the spurious harmonic passbands. In addition, stepped-impedance resonators (SIRs) are implemented to generate a narrow notched band inside the UWB passband to avoid interference with existing radio signals.
采用分布式短线传输线结构的超宽带(UWB)带通滤波器的最新发展
本文综述了采用分布式短线传输线结构的超宽带滤波器的研究进展。通过电磁仿真和实验结果对几种先进的超宽带滤波器进行了验证。该滤波器基于由非冗余连接线分隔的短路存根组成的最佳分布式高通滤波器的电路模型。结果表明,非相邻谐振器之间或输入/输出馈线之间的交叉耦合可以产生新的传输零点,从而提高了存根滤波器的性能。结果表明,用阶跃阻抗线代替存根滤波器的均匀连接线可以有效地抑制杂散谐波。此外,实现了阶跃阻抗谐振器(SIRs),在UWB通带内产生窄陷波带,以避免对现有无线电信号的干扰。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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