宽带滤波电路中可重构限带结构的设计与分析
毕业论文关键词 十字型多模谐振器 可重构限带 超宽带带通滤波器
Title Design of Ultra-Wideband Bandpass Filters With
Fixed and Reconfigurable Notch Bands
Abstract
In this paper, a novel terminated cross-shaped resonator (TCSR) is analyzed and
used to design two ultra-wideband (UWB) bandpass filters (BPFs) with fixed and
reconfigurable notch bands. It is found that a TCSR can exhibit different numbers
of poles and zeros at different frequencies when open, shorted or capacitive
terminations are applied, respectively. The intrinsic zero is simply used for the
implementation of notch bands offering systematic design and flexible tuning
capabilities. Two UWB BPF prototypes, including a five-pole filter with 77.4 %
fractional bandwidth (FBW) and two reconfigurable notch bands relatively from 2.09
GHz to 2.48 GHz and 2.74 GHz to 3.22 GHz, and a five-pole filter with 90.0 4% FBW
and a notch band at 2.4 GHz and a reconfigurable notch band from 4.18 to 4.45 GHz
are designed and analyzed.
Keywords Cross-shaped resonator(TCSR), reconfigurable notch bands,
ultra-wideband (UWB), bandpass filters (BPFs)
目 次
1 引言 1
1.1 本课题的研究背景 1
1.2 超宽带通信系统简介 2
1.3 可重构滤波器研究现状 4
2 具有两个可调限带的超宽带带通滤波器 7
2.1 多模谐振器特性与分析 7
2.2 滤波器分析与设计 9
2.3 结果与讨论 16
3 具有一个固定限带一个可调限带的超宽带带通滤波器 22
3.1 滤波器结构分析与设计 22
3.2 测试结果与讨论 29
结论 32
致谢 33
参考文献 34
1 引言
1.1 本课题的研究背景
目前现代射频系统正在朝着全可调，多目标的方向发展，旨在实现一种通用的高频收发
模块。相应的例子有很多，例如新兴的基于软件的无线多功能有感知雷达。它可以在大范围
的射频段迅速调节工作频率，同时它具有动态频谱成像功能，可以最优化实现目标[1]–[3]
。因
此，可以更精细地控制频率以实现高标准的可重构射频器件再度成为研究热点。高频可重构
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