An mmWave Dual-Band Integrated Substrate Gap Waveguide Single Cavity Filter with Frequency Selectivity

作     者：Qiuhua Lin Dongya Shen Lihui Wang Zhiyong Luo Qiuhua Lin;Dongya Shen;Lihui Wang;Zhiyong Luo

作者机构：School of Electronics and Communication EngineeringSun Yat-sen UniversityShenzhen 518107China School of Information Science and EngineeringYunnan UniversityKunming 650091China Pengcheng LaboratoryShenzhen 518107China Shenzhen Key Laboratory of Navigation and Communication IntegrationShenzhen 518107China 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2024年第21卷第1期

页      面：188-199页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the National key research and development program of China(No.2021YFB2900401) by the National Natural Science Foundation of China(No.61861046) the key Natural Science Foundation of shenzhen(No.JCYJ20220818102209020) the key research and development program of shenzhen(No.ZDSYS20210623091807023) 

主　　题：coupling topology frequency selectivity non-resonating node(NRN) out-of-band suppression single ISGW cavity filter 

摘      要：A novel dual-band ISGW cavity filter with enhanced frequency selectivity is proposed in this paper by utilizing a multi-mode coupling *** cavity is designed to control the number of modes,and then the ports are determined by analyzing the coupling relationship between these selected *** synthesizing the coupling matrix of the filter,a nonresonating node(NRN)structure is introduced to flexibly tune the frequency of modes,which gets a dualband and quad-band filtering response from a tri-band filter no the ***,a frequency selective surface(FSS)has been newly designed as the upper surface of the cavity,which significantly improves the bad out-of-band suppression and frequency selectivity that often exists in most traditional cavity filter designs and *** results show that its two center frequencies are f01=27.50 GHz and f02=32.92GHz,*** with the dual-band filter that there is no the FSS metasurface,the out-of-band suppression level is improved from measured 5 dB to18 dB,and its finite transmission zero(FTZ)numbers is increased from measured 1 to 4 between the two designed *** with the tri-band and quadband filter,its passband bandwidth is expanded from measured 1.17%,1.14%,and 1.13% or 1.31%,1.50%,0.56%,and 0.57% to 1.71% and 1.87%.In addition,the filter has compact,small,and lightweight characteristics.