Slotline-Based Balanced Filter With Ultra-Wide Stopband and High Selectivity

被引：25
作者：
Bi, Xiaojun [1 ,2 ]
Zeng, Xing [1 ,2 ]
Xu, Qinfen [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Shenzhen Inst, Shenzhen 518000, Peoples R China
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2020年 / 67卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Slotline-based; pi-type slotline structure; stopband suppression; insertion loss; split-ring slotline resonator (SRSR); selectivity; BAND BANDPASS FILTER; COMMON-MODE;
D O I：
10.1109/TCSII.2019.2914072
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Slotline-based balanced filter with ultra-wide stopband is proposed in this brief. The proposed balanced filter integrates split-ring slotline resonators (SRSRs) and pi-type slotline structures, which not only increase the selectivity, but also enhance suppression in a stopband range of 7.1 times as large as center frequency. The SRSRs are implemented by two symmetrically folded stepped-impedance resonators and used as a second-order resonant circuit to obtain high-selectivity bandpass response. Moreover, the pi-type slotline structure enhances harmonic rejection significantly. The fabricated balanced filter demonstrates an insertion loss of 1.07 dB (3.5 GHz), a differential-mode (DM) stopband suppression of 20 dB @ up to 7.1, a common-mode (CM) suppression of 40.5 dB over the passband. To the best of the authors' knowledge, with maintaining competitive in-band performances, the proposed balanced filter achieves the widest stopband suppression.
引用
收藏
页码：460 / 464
页数：5
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共 18 条
[1]   Differential-mode bandpass filter on microstrip line with wideband common-mode suppression [J].
Chen, Dong ;
Zhu, Lei ;
Bu, Huizheng ;
Cheng, Chonghu .
ELECTRONICS LETTERS, 2017, 53 (03) :163-U44
[2]   Wideband Balanced Filters With High Selectivity and Common-Mode Suppression [J].
Chu, Qing-Xin ;
Qiu, Lei-Lei .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2015, 63 (10) :3462-3468
[3]   Strip-Loaded Slotline Resonator for Compact Differential-Mode Bandpass Filters with Improved Upper Stopband Performance [J].
Feng, Lin-Ping ;
Zhu, Lei .
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2017, 27 (02) :108-110
[4]   Multi-Functional Balanced-to-Unbalanced Filtering Power Dividers With Extended Upper Stopband [J].
Feng, Wenjie ;
Ma, Xueke ;
Gomez-Garcia, Roberto ;
Shi, Yongrong ;
Che, Wenquan ;
Xue, Quan .
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2019, 66 (07) :1154-1158
[5]   High Selectivity Wideband Balanced Filters With Multiple Transmission Zeros [J].
Feng, Wenjie ;
Gao, Xin ;
Che, Wenquan ;
Yang, Wanchen ;
Xue, Quan .
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2017, 64 (10) :1182-1186
[6]   High-Selectivity Wideband Balanced Filters Using Coupled Lines With Open/Shorted Stubs [J].
Gao, Xin ;
Feng, Wenjie ;
Che, Wenquan .
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2017, 27 (03) :260-262
[7]   Multi-Stub-Loaded Differential-Mode Planar Multiband Bandpass Filters [J].
Gomez-Garcia, Roberto ;
Loeches-Sanchez, Raul ;
Psychogiou, Dimitra ;
Peroulis, Dimitrios .
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2018, 65 (03) :271-275
[8]   Optimized Design of Differential Moderate-Band BPF on Coupled Slotline Resonators [J].
Guo, Xin ;
Zhu, Lei ;
Wu, Wen .
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2017, 27 (03) :263-265
[9]   Strip-Loaded Slotline Resonators for Differential Wideband Bandpass Filters With Intrinsic Common-Mode Rejection [J].
Guo, Xin ;
Zhu, Lei ;
Wu, Wen .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2016, 64 (02) :450-458
[10]   S-Shaped Complementary Split Ring Resonators and Their Application to Compact Differential Bandpass Filters With Common-Mode Suppression [J].
Horestani, Ali K. ;
Duran-Sindreu, Miguel ;
Naqui, Jordi ;
Fumeaux, Christophe ;
Martin, Ferran .
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2014, 24 (03) :149-151
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