直角耦合结构的宽阻带SIW 滤波器

doi:10.3969/j.issn.1007-2861.2013.07.033

上海大学学报(自然科学版) ›› 2014, Vol. 20 ›› Issue (4): 466-471.doi: 10.3969/j.issn.1007-2861.2013.07.033

直角耦合结构的宽阻带SIW 滤波器

任龙1,2, 孟令琴1,2, 祝君豪1, 周景超1, 刘洁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:2013-07-24 出版日期:2014-08-25 发布日期:2014-08-25
通讯作者: 孟令琴(1965—), 女, 副教授, 博士, 研究方向为微波、毫米波新技术. E-mail: menglq@shu.edu.cn 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、毫米波新技术. E-mail: menglq@shu.edu.cn
基金资助:
上海市重点学科建设资助项目(S30108); 上海市科委重点实验室资助项目(08DZ2231100); 毫米波国家重点实验室开放课题经费资助项目(K201324)

Wide Stopband SIW Filter with Right-Angle Coupling Structure

REN Long1,2, MENG Ling-qin1,2, ZHU Jun-hao1, ZHOU Jing-chao1, LIU Jie1

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:2013-07-24 Online:2014-08-25 Published:2014-08-25

摘要/Abstract

摘要： 提出一种新型的宽阻带基片集成波导(substrate integrated waveguide, SIW)滤波器. 该滤波器采用直角耦合结构, 在上阻带产生两个传输零点(transmission zeros, TZs), 分别位于两个不同的二次模(TE102/TE201) 谐振频率附近. 为了进一步提高滤波器的阻带特性, 在SIW的上层金属面蚀刻两个矩形槽. 测量结果表明, 该滤波器中心频率10 GHz处的插入损耗为1.9 dB, 通带内回波损耗大于20 dB. 阻带抑制大于20 dB 的频段为10.518.8 GHz, 有效抑制了二次谐波响应. 相比传统SIW 带通滤波器, 阻带宽度增加了48%. 实测结果与仿真结果吻合良好.

关键词: 传输零点, 基片集成波导, 宽阻带, 直角耦合, 带通滤波器

Abstract: A wide stopband filter based on substrate integrated waveguide (SIW) is proposed. Using a right-angle coupling structure, the filter has two transmission zeros (TZs) in the upper stopband. These TZs are located near the resonant frequencies of the two different second-order modes (TE102/TE201), respectively. To further improve the stopband performance, two rectangular slots are etched on the top metal layer of the SIW. The insertion loss is approximately 1.9 dB at the center frequency of 10 GHz. The return loss in the passband is more than 20 dB. The stopband attenuation within 10.518.8 GHz is better than 20 dB, and the second harmonic response is effectively inhibited. Compared with the traditional bandpass filter based on SIW, the stopband bandwidth of this filter is widened by 48%. Measured results well agree with numerical simulations.

Key words: right-angle coupling, substrate integrated waveguide (SIW), transmission zeros (TZs), bandpass filter, wide stopband

中图分类号:

TN 713

任龙1,2, 孟令琴1,2, 祝君豪1, 周景超1, 刘洁1. 直角耦合结构的宽阻带SIW 滤波器[J]. 上海大学学报(自然科学版), 2014, 20(4): 466-471.

REN Long1,2, MENG Ling-qin1,2, ZHU Jun-hao1, ZHOU Jing-chao1, LIU Jie1. Wide Stopband SIW Filter with Right-Angle Coupling Structure[J]. Journal of Shanghai University（Natural Science Edition）, 2014, 20(4): 466-471.

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直角耦合结构的宽阻带SIW 滤波器

Wide Stopband SIW Filter with Right-Angle Coupling Structure

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