一种基于耦合线和环形微带线的负群时延电路  

A Negative Group Delay Circuit Based on Coupled Line and Ring-Shaped Microstrip Line

作　　者：王康挺 李宁东 万发雨[1] 王健 WANG Kang-ting;LI Ning-dong;WAN Fa-yu;WANG Jian(School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学电子与信息工程学院

出　　处：《微波学报》2019年第5期35-39,共5页Journal of Microwaves

基　　金：国家自然科学基金(61601233,61750110535);江苏省自然科学基金(BK20150918);北京东方计量测试研究所刘尚合院士专家工作站静电研究基金(BOIMTLSHJD20181003);江苏省双创团队人才计划(SRCB201526)

摘　　要：负群时延电路(NGDC)在微波系统中有着广泛应用,文中提出了一种基于有损耦合线和环形微带线的负群时延电路。该电路由耦合线和微带传输线组成。基于射频领域中偶模-奇模分析方法,分析该电路的偶模和奇模的输入导纳,得到电路的S参数。利用HFSS电磁仿真软件对该负群时延电路结构做了优化设计,实物加工并测试。测试结果表明:在中心频率2.36 GHz时,该电路的负群时延值约为-1.4 ns,插入损耗S21约为-3.9 dB,反射系数S11约为-9.5 dB,实测与仿真结果吻合。这种新颖的负群时延电路结构简单、信号损耗小、易于加工,可用于微波和无线通信等领域。Negative group delay circuit(NGDC)has a wide range of applications in microwave systems.Therefore,a NGDC based on lossy coupled line and ring-shaped microstrip line is proposed.The circuit consists of a coupled line and microstrip transmission line.Based on the even mode-odd mode analysis method in the RF field,the input admittances of the even and odd modes of the circuit are analyzed,and the S parameters of the circuit are obtained.The structure of the NGDC was optimized by HFSS electromagnetic simulation software,and the fabrication and test were carried out.The test results show that the negative group delay value of the circuit is about-1.4 ns,the insertion loss S21 is about-3.9 dB,and the reflection coefficient S11 is about-9.5 dB at the center frequency of 2.36 GHz.The measured results agree well with the simulation results.This novel NGDC has a simple structure,small signal loss and can be easily processed,which can be used in the fields of microwave and wireless communication.

关 键 词：负群时延电路 耦合微带线 偶模-奇模 S 参数 

分 类 号：TN7[电子电信—电路与系统]