短开路耦合谐振器加载的宽带带通滤波电路  

Wideband Bandpass Circuit Based on the Shorted/Open Coupled Line Resonators

作　　者：陈荻 Chen Di(Nanjing Electronic Devices Institute,Nanjing 210016,China)

机构地区：[1]南京电子器件研究所,江苏南京210016

出　　处：《南京师范大学学报（工程技术版）》2021年第2期22-26,共5页Journal of Nanjing Normal University(Engineering and Technology Edition)

摘　　要：提出了一种基于短开路耦合器加载的宽带带通滤波电路.该滤波电路通过在输入和输出端口之间,并连加载短路耦合微带谐振器和开路耦合微带谐振器实现5个传输极点和3个传输零点的带通选择特性.对所提出的短开路耦合谐振器进行了奇偶模理论分析,揭示了其传输零极点形成的物理机理.最后,对所提出的滤波电路进行了加工测试.测试结果表明,所提出的宽带滤波电路能够在2.0~4.2 GHz频率范围内实现3 d B带通传输,工作相对带宽为73%,仿真和实测结果吻合较好.A wideband bandpass filter circuit is proposed in the paper by loading the shorted/open coupled line resonators.Five transmission poles and three transmission zeros are obtained by parallel loading the shorted and open coupled line resonators.To give a physical insight,the shorted and open coupled line resonators are analyzed with the even-/odd-mode theory.Finally,the designed bandpass circuit is fabricated and measured.The measured results show that a 3 d B fractional bandwidth of 73%is obtained and its operating frequency range is from 2.0 GHz to 4.2 GHz,which suggests a good agreement with the simulated one.

关 键 词：短开路耦合线谐振器 多模谐振 带通滤波电路 

分 类 号：TN61[电子电信—电路与系统]