双模谐振器设计超宽带滤波器

上海大学学报(自然科学版) ›› 2009, Vol. 15 ›› Issue (5): 461-463.

双模谐振器设计超宽带滤波器

上海大学通信与信息工程学院,上海 200072

收稿日期:2008-04-27 出版日期:2009-10-30 发布日期:2009-10-30
通讯作者: 肖中银(1964～)，男，副教授，博士,研究方向为微波电路. E-mail:zhyxiao@staff.shu.edu.cn
基金资助:
上海市重点学科建设资助项目(S30108)

Design of Ultra-Wideband Filter with Dual-Mode Resonator

School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China

Received:2008-04-27 Online:2009-10-30 Published:2009-10-30

摘要/Abstract

摘要：

利用双模谐振器设计一个结构新颖紧凑的超宽带(UWB)滤波器,该滤波器的通带为3.9~11.6 GHz，通带最低频率(FBW)达99%.两个衰减极点分别产生在靠近通带的两边,提高了通带频率的选择性.另外两个衰减极点产生在通带高频端的阻带内,抑制双模谐振器二次谐振产生的谐振模式,很好地改进了阻带性能.仿真和测量结果表明,通带内插入损耗低于1.0 dB(3.9~11.6 GHz),高阻带内插入损耗大于15.0 dB (12.0~19.5 GHz),整个通带内群延迟小于0.5 ns.仿真和测量结果很好地吻合,表明此超宽带滤波器的有效性.

关键词: 双模谐振器;超宽带(UWB);衰减极点;滤波器

Abstract:

An ultra-wideband (UWB) filter with a novel compact structure using dual-mode resonators is proposed. The passband ranges from 3.9~11.6 GHz, achieving about 99% fractional bandwidth (FBW). Two sharp attenuation poles can be located close to either side of the desired pass-band to improve the frequency selectivity. The other two attenuation poles can be set in the stopband of upper frequencies so as to reject the third resonant modes of dualmode resonators. The measured results demonstrate that the insertion loss is below 1.0 dB in the passband, and higher than 15.0 dB in the upper-stopband (12.0~19.5 GHz). Group delay variation in the passband is less than 0.5 ns. The measured result agrees well with the electromagnetic (EM) simulated result, demonstrating validity of the filter.

Key words: dual-mode resonator; ultra-wideband (UWB); attenuation pole; filter

中图分类号:

TN 822.4

胡红虹肖中银高山. 双模谐振器设计超宽带滤波器[J]. 上海大学学报(自然科学版), 2009, 15(5): 461-463.

HU Hong-Hong, XIAO Zhong-Yin, GAO Shan. Design of Ultra-Wideband Filter with Dual-Mode Resonator[J]. Journal of Shanghai University（Natural Science Edition）, 2009, 15(5): 461-463.