基于枝节加载谐振器的新型三频带通滤波器设计
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摘要
提出了一种新型平面三频带通滤波器,该滤波器由一个加载短路枝节的阶梯阻抗谐振器,一对加载开路枝节的背靠背E型谐振器,以及包含源负载直接耦合的馈电结构组成.所采用的枝节加载谐振器的多模工作特性使滤波器的体积大大减小,同时每个通带的位置及其耦合特性都能够独立调谐.另外,通过源负载直接耦合引入通带两侧的传输零点,实现了滤波器良好的频率选择性.最后设计并加工了一款高选择性小型化三频带通滤波器,其三个通带的中心频率分别为2.0GHz,3.95GHz和6.35GHz,插入损耗均小于2.5dB,带内回波损耗均优于14dB,实验结果与仿真结果吻合良好.
A new microstrip tri-band bandpass filter is presented.The filter is composed of a stepped-impedance resonator loaded with short stub,a pair of E-shape resonators loaded with open stub,and the external coupling structure with input/output direct-coupling.Due to the multi-mode characteristics of the resonators,the filter size can be significantly miniaturized,and each passband can be separately controlled.In addition,the proposed filter can generate six transmission zeros on both sides of each passband,resulting in improved frequency selectivity.Such a demonstrative tri-band bandpass filter with center frequencies of 2.0 GHz,3.95 GHz and 6.35 GHz were designed and fabricated.The measured results show that the insertion loss is less than 2.5 dB,and the return loss is better than 14 dB for each passband,which is in agreement with the simulated ones.
A new microstrip tri-band bandpass filter is presented.The filter is composed of a stepped-impedance resonator loaded with short stub,a pair of E-shape resonators loaded with open stub,and the external coupling structure with input/output direct-coupling.Due to the multi-mode characteristics of the resonators,the filter size can be significantly miniaturized,and each passband can be separately controlled.In addition,the proposed filter can generate six transmission zeros on both sides of each passband,resulting in improved frequency selectivity.Such a demonstrative tri-band bandpass filter with center frequencies of 2.0 GHz,3.95 GHz and 6.35 GHz were designed and fabricated.The measured results show that the insertion loss is less than 2.5 dB,and the return loss is better than 14 dB for each passband,which is in agreement with the simulated ones.
引文
[1] WU Hung-wei,JIAN Li-yi,CHEN yung-wei,SU Yan-kui.New triple-passband bandpass filter using multipath stub loaded resonators[J].IEEE Microwave and Wireless Components Letters,2016,26(3):186-188.
[2] ZHOU Xiao-jun,ZHAO Yong-jiu,FU Yong,LIU Yan-yun.Compact dual-mode tri-band microstrip BPF with three sets of resonators[J].Progress in Electromagnetics Research Letters,2012,33(1):47-54.
[3] WENG Min-hang,WU Hung-wei,SHU Kevin,CHEN Jau-rung,YANG Ru-yuan,SU Yan-kuin.A novel triple-band bandpass filter using multilayer-based substrates for WiMAX[A].European Microwave Conference (EuMC)[C].US:IEEE,2007.325-328.
[4] LUO Sha,ZHU Lei,SUN Sheng.Compact dual-mode triple-band bandpass filters using three pairs of degenerate modes in a ring resonator[J].IEEE Transactions on Microwave Theory & Techniques,2011,59(5):1222-1229.
[5] WEI Feng,QIN Pei-yuan,GUO Y Jay,DING Chen,SHI Xiao-wei.Compact balanced dual- and tri-band BPFs based on coupled complementary split-ring resonators (C-CSRR)[J].IEEE Microwave and Wireless Components Letters,2016,26(2):107-109.
[6] MURMU Lakhindar,DAS Sushrut,BAGE Amit.A compact tri-band bandpass filter using multi-mode stub-loaded resonator[A].Asia-Pacific Microwave Conference (APMC)[C].New Delhi,India:IEEE,2016.1-4.
[7] GAO Li,ZHANG Xiu-yin,XUE Quan.Compact tri-band bandpass filter using novel eight-mode resonator for 5G WiFi application[J].IEEE Microwave and Wireless Components Letters,2015,25(10):660-662.
[8] 张德伟,王树兴,刘庆,周东方,张毅,吕大龙,吴瑛.基于奇偶模分析法的四模谐振器结构的双通带带通滤波器设计[J].电子学报,2018,46(2):387-392.ZHANG De-wei,WANG Shu-xing,LIU Qing,ZHOU Dong-fang,ZHANG Yi,LU Da-long,WU Ying.The design of dual band bandpass filter using novel quadruple mode resonator based on odd and even mode method[J].Acta Electronica Sinica,2018,46(2):387-392.(in Chinese)
[9] LIU Hai-wen,SONG Yi,REN Bao-ping,WEN Pin,GUAN Xue-hui,XU He-xiu.Balanced tri-band bandpass filter design using octo-section stepped-impedance ring resonator with open stubs[J].IEEE Microwave and Wireless Components Letters,2017,27(10):912-914.
[10] LAN Siang-wen,WENG Min-hang,CHANG Shoou-jinn,HUNG Cheng-yuan,LIU Shih-kun.A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators[J].IEEE Microwave and Wireless Components Letters,2015,25(1):19-21.
[11] GAO Li,ZHANG Xiu-yin,ZHAO Xiao-lan,ZHANG Yao,XU Jin-xu.Novel compact quad-band bandpass filter with controllable frequencies and bandwidths[J].IEEE Microwave and Wireless Components Letters,2016,26(6):395-397.
[12] XU Jin.Compact microstrip tri-band bandpass filter using new stubs loaded stepped-impedance resonator[J].IEEE Microwave and Wireless Components Letters,2016,26(4):249-251.
[13] LAI Xin,LIANG Chang-hong,DI Hao,WU Bian.Design of tri-band filter based on stub loaded resonator and DGS resonator[J].IEEE Microwave and Wireless Components Letters,2010,20(5):265-267.
[14] 王树兴,吴瑛,周东方,张德伟,张毅.基于微带贴片谐振器的高选择性双模双通带带通滤波器的研究[J].电子学报,2018,46(3):595-601.WANG Shu-xing,WU Ying,ZHOU Dong-fang,ZHANG De-wei,ZHANG Yi.Study of high-selectivity dual-mode dual-band bandpass filters based on microstrip patch resonator[J].Acta Electronica Sinica,2018,46(3):595-601.(in Chinese)
[15] 赵晖,崔铁军.基片集成波导中的混合左右手结构及其应用[J].电子学报,2007,35(6A):108-111.ZHAO Hui,CUI Tie-jun.Composite right/left handed structure realized by substrate integrated waveguide and its applications[J].Acta Electronica Sinica,2007,35(6A):108-111.(in Chinese)
[16] SHEN Guang-xu,CHE Wen-quan,XUE Quan.Novel tri-band bandpass filter with independently controllable frequencies,bandwidths,and return losses[J].IEEE Microwave and Wireless Components Letters,2017,27(6):560-562.
[17] MAKIMOTO Mitsuo,YAMASHITA Sadahiko.Microwave Resonators and Filters for Wireless Communication[M].Berlin:Springer,2000.11-18.
[18] ZHANG Xiu-yin,CHEN Jian-xin,XUE Quan,LI Si-min.Dual-band bandpass filters using stub-loaded resonators[J].IEEE Microwave and Wireless Components Letters,2007,17(8):583-585.
[19] 周春霞,夏侯海,左涛,何明,赵新杰,方兰,阎少林.自均衡双通带微带滤波器综合与设计[J].电子学报,2009,37(12):2783-2786.ZHOU Chun-xia,XIA Hou-hai,ZUO Tao,HE Ming,ZHAO Xin-jie,FANG Lan,YAN Shao-lin.Synthesis and design of self-equalized dual passband filters[J].Acta Electronica Sinica,2009,37(12):2783-2786.(in Chinese)
[20] Hong J S.Microstrip Filters for RF/Microwave Applications,2nd ed[M].New York:Wiley,2011.
[2] ZHOU Xiao-jun,ZHAO Yong-jiu,FU Yong,LIU Yan-yun.Compact dual-mode tri-band microstrip BPF with three sets of resonators[J].Progress in Electromagnetics Research Letters,2012,33(1):47-54.
[3] WENG Min-hang,WU Hung-wei,SHU Kevin,CHEN Jau-rung,YANG Ru-yuan,SU Yan-kuin.A novel triple-band bandpass filter using multilayer-based substrates for WiMAX[A].European Microwave Conference (EuMC)[C].US:IEEE,2007.325-328.
[4] LUO Sha,ZHU Lei,SUN Sheng.Compact dual-mode triple-band bandpass filters using three pairs of degenerate modes in a ring resonator[J].IEEE Transactions on Microwave Theory & Techniques,2011,59(5):1222-1229.
[5] WEI Feng,QIN Pei-yuan,GUO Y Jay,DING Chen,SHI Xiao-wei.Compact balanced dual- and tri-band BPFs based on coupled complementary split-ring resonators (C-CSRR)[J].IEEE Microwave and Wireless Components Letters,2016,26(2):107-109.
[6] MURMU Lakhindar,DAS Sushrut,BAGE Amit.A compact tri-band bandpass filter using multi-mode stub-loaded resonator[A].Asia-Pacific Microwave Conference (APMC)[C].New Delhi,India:IEEE,2016.1-4.
[7] GAO Li,ZHANG Xiu-yin,XUE Quan.Compact tri-band bandpass filter using novel eight-mode resonator for 5G WiFi application[J].IEEE Microwave and Wireless Components Letters,2015,25(10):660-662.
[8] 张德伟,王树兴,刘庆,周东方,张毅,吕大龙,吴瑛.基于奇偶模分析法的四模谐振器结构的双通带带通滤波器设计[J].电子学报,2018,46(2):387-392.ZHANG De-wei,WANG Shu-xing,LIU Qing,ZHOU Dong-fang,ZHANG Yi,LU Da-long,WU Ying.The design of dual band bandpass filter using novel quadruple mode resonator based on odd and even mode method[J].Acta Electronica Sinica,2018,46(2):387-392.(in Chinese)
[9] LIU Hai-wen,SONG Yi,REN Bao-ping,WEN Pin,GUAN Xue-hui,XU He-xiu.Balanced tri-band bandpass filter design using octo-section stepped-impedance ring resonator with open stubs[J].IEEE Microwave and Wireless Components Letters,2017,27(10):912-914.
[10] LAN Siang-wen,WENG Min-hang,CHANG Shoou-jinn,HUNG Cheng-yuan,LIU Shih-kun.A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators[J].IEEE Microwave and Wireless Components Letters,2015,25(1):19-21.
[11] GAO Li,ZHANG Xiu-yin,ZHAO Xiao-lan,ZHANG Yao,XU Jin-xu.Novel compact quad-band bandpass filter with controllable frequencies and bandwidths[J].IEEE Microwave and Wireless Components Letters,2016,26(6):395-397.
[12] XU Jin.Compact microstrip tri-band bandpass filter using new stubs loaded stepped-impedance resonator[J].IEEE Microwave and Wireless Components Letters,2016,26(4):249-251.
[13] LAI Xin,LIANG Chang-hong,DI Hao,WU Bian.Design of tri-band filter based on stub loaded resonator and DGS resonator[J].IEEE Microwave and Wireless Components Letters,2010,20(5):265-267.
[14] 王树兴,吴瑛,周东方,张德伟,张毅.基于微带贴片谐振器的高选择性双模双通带带通滤波器的研究[J].电子学报,2018,46(3):595-601.WANG Shu-xing,WU Ying,ZHOU Dong-fang,ZHANG De-wei,ZHANG Yi.Study of high-selectivity dual-mode dual-band bandpass filters based on microstrip patch resonator[J].Acta Electronica Sinica,2018,46(3):595-601.(in Chinese)
[15] 赵晖,崔铁军.基片集成波导中的混合左右手结构及其应用[J].电子学报,2007,35(6A):108-111.ZHAO Hui,CUI Tie-jun.Composite right/left handed structure realized by substrate integrated waveguide and its applications[J].Acta Electronica Sinica,2007,35(6A):108-111.(in Chinese)
[16] SHEN Guang-xu,CHE Wen-quan,XUE Quan.Novel tri-band bandpass filter with independently controllable frequencies,bandwidths,and return losses[J].IEEE Microwave and Wireless Components Letters,2017,27(6):560-562.
[17] MAKIMOTO Mitsuo,YAMASHITA Sadahiko.Microwave Resonators and Filters for Wireless Communication[M].Berlin:Springer,2000.11-18.
[18] ZHANG Xiu-yin,CHEN Jian-xin,XUE Quan,LI Si-min.Dual-band bandpass filters using stub-loaded resonators[J].IEEE Microwave and Wireless Components Letters,2007,17(8):583-585.
[19] 周春霞,夏侯海,左涛,何明,赵新杰,方兰,阎少林.自均衡双通带微带滤波器综合与设计[J].电子学报,2009,37(12):2783-2786.ZHOU Chun-xia,XIA Hou-hai,ZUO Tao,HE Ming,ZHAO Xin-jie,FANG Lan,YAN Shao-lin.Synthesis and design of self-equalized dual passband filters[J].Acta Electronica Sinica,2009,37(12):2783-2786.(in Chinese)
[20] Hong J S.Microstrip Filters for RF/Microwave Applications,2nd ed[M].New York:Wiley,2011.
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