新型三阶SIR高阻带抑制双通带滤波器

doi:10.3969/j.issn.1007-2861.2015.01.019

上海大学学报(自然科学版) ›› 2017, Vol. 23 ›› Issue (1): 147-154.doi: 10.3969/j.issn.1007-2861.2015.01.019

• 研究论文 • 上一篇

新型三阶SIR高阻带抑制双通带滤波器

姜逸飞^1,2, 孟令琴^1,2, 杨广立¹

1．上海大学特种光纤与光接入网省部共建重点实验室, 上海200072;
2. 东南大学毫米波国家重点实验室, 南京210096

收稿日期:2015-02-03 出版日期:2017-02-28 发布日期:2017-02-28
通讯作者: 孟令琴(1965—), 女, 副教授, 博士, 研究方向为微波及毫米波新技术. E-mail: menglq@shu.edu.cn
作者简介:孟令琴(1965—), 女, 副教授, 博士, 研究方向为微波及毫米波新技术. E-mail: menglq@shu.edu.cn
基金资助:
上海市科委重点实验室资助项目(08DZ2231100); 上海市重点学科建设资助项目(S30108); 毫米波国家重点实验室开放课题经费资助项目(K201324)

A novel tri-section SIR dual-band filter with high stopband rejection

JIANG Yifei^1,2, MENG Lingqin^1,2, YANG Guangli¹

1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China;
2. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

Received:2015-02-03 Online:2017-02-28 Published:2017-02-28

摘要/Abstract

摘要：

采用三阶信噪比(signal to interference ratio, SIR)干扰谐振器作为基本谐振单元, 通过调整阻抗比控制主频和第一杂散频率的位置, 设计了一种新型高阻带抑制双通带滤波器. 滤波器第一通带由主谐振频率产生, 第二通带由第一杂散频率产生. 运用三角耦合结构作为该滤波器的拓扑结构, 使得整体滤波器呈现出带外传输零点和阻带的高抑制度. 使用交指型耦合结构实现输入/输出端的强耦合, 得到较高的外部品质因数. 该滤波器的两个通带中心频率分别为1.57 GHz (GPS)和2.5 GHz (4G), 3 dB带宽分别为4.0%和2.4%. 结果表明, 测量结果和仿真结果基本吻合.

关键词: 高抑制度, 传输零点, 三角耦合结构, 三阶SIR谐振器

Abstract:

A dual-band filter with high stopband rejection is designed using a tri-section signal to interference ratio (SIR) resonator. The center frequencies and first spurious frequencies of resonators can be controlled independently to design aspecific dual-band filter. The tri-section coupling structure is aimed at transmission zeros and high stopbands rejection. To get a high external quality factor, an inter-digital finger coupling structure is introduced. The filter has dual passband center frequencies of 1.57 GHz (GPS) and 2.5 GHz (4G), with 3 dB fractional bandwidths of 4.0% and 2.4%, respectively. Measured results well agree with simulations.

Key words: high stopband rejection , transmission zero, tri-section coupling structure , tri-section signal to interference ratio (SIR) resonator

姜逸飞1,2, 孟令琴1,2, 杨广立1. 新型三阶SIR高阻带抑制双通带滤波器[J]. 上海大学学报(自然科学版), 2017, 23(1): 147-154.

JIANG Yifei1,2, MENG Lingqin1,2, YANG Guangli1. A novel tri-section SIR dual-band filter with high stopband rejection[J]. Journal of Shanghai University（Natural Science Edition）, 2017, 23(1): 147-154.

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新型三阶SIR高阻带抑制双通带滤波器

A novel tri-section SIR dual-band filter with high stopband rejection

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