Hostname: page-component-76c49bb84f-l6pkv Total loading time: 0 Render date: 2025-07-13T17:45:31.781Z Has data issue: false hasContentIssue false
  • English
  • Français

High-selectivity ultra-wideband balanced bandpass filter with harmonic suppression

Published online by Cambridge University Press:  03 March 2025

Shipeng Zhao ,
Zhongbao Wang Open the ORCID record for Zhongbao Wang [Opens in a new window] ,
Hongmei Liu Open the ORCID record for Hongmei Liu [Opens in a new window]  and
Shaojun Fang
Shipeng Zhao
Affiliation:
School of Information Science and Technology, Dalian Maritime University, Dalian, Liaoning, China
Zhongbao Wang*
Affiliation:
School of Information Science and Technology, Dalian Maritime University, Dalian, Liaoning, China Liaoning Key Laboratory of Radio Frequency and Big Data for Intelligent Applications, Liaoning Technical University, Huludao, Liaoning, China
Hongmei Liu
Affiliation:
School of Information Science and Technology, Dalian Maritime University, Dalian, Liaoning, China
Shaojun Fang
Affiliation:
School of Information Science and Technology, Dalian Maritime University, Dalian, Liaoning, China
*
Corresponding author: Zhongbao Wang; Email: wangzb@dlmu.edu.cn
Get access Rights & Permissions [Opens in a new window]

Abstract

A novel high-selectivity ultra-wideband (UWB) balanced bandpass filter (BPF) with harmonic suppression characteristics is proposed. The differential-mode UWB passband is constructed using quarter-wavelength asymmetrical parallel-coupled transmission lines, resulting in sharp filtering selectivity, while common-mode noises are suppressed by loading the T-type stubs. A simple design method of integrating bandstop filter branches into the BPF for third harmonic suppression without increasing the circuit size is described and confirmed. A planar high-selectivity balanced BPF prototype is manufactured and measured at 2.6 GHz with a measured 3-dB fractional bandwidth of 108% to validate the framework principle. More importantly, with third harmonic suppression characteristics, the measured out-of-band rejection is more than 20 dB, spanning 4.35 GHz until 12.4 GHz.

Keywords

Balanced bandpass filtercommon-mode suppressionharmonic suppressionUWB

Information

Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 17 , Issue 1 , February 2025 , pp. 55 - 64
Check for updates
Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Wang, M, Sun, S, Ma, HF and Cui, TJ (2020) Supercompact and ultrawideband surface plasmonic bandpass filter. IEEE Transactions on Microwave Theory and Techniques 68, 732–740.CrossRefGoogle Scholar
Ghazali, AN, Sazid, M and Pal, S (2018) A dual notched band UWB-BPF based on microstrip-to-short circuited CPW transition. International Journal of Microwave and Wireless Technologies 10, 794–800.CrossRefGoogle Scholar
Ghazali, AN and Sazid, M (2024) A planar BPF for UWB communication systems with single/multiple interference rejection bands. International Journal of Microwave and Wireless Technologies 16, 55–62.CrossRefGoogle Scholar
Zheng, Y, Wang, W and Wu, YL (2023) Synthesis of high-selectivity ultra-wideband reflective/absorptive bandpass filters with unequal-width three-coupled line sections. IEEE Transactions on Circuits and Systems II: Express Briefs 70, 1961–1965.Google Scholar
Bandyopadhyay, A, Sarkar, P and Ghatak, R (2022) A bandwidth reconfigurable bandpass filter for ultra-wideband and wideband applications. IEEE Transactions on Circuits and Systems II: Express Briefs 69, 2747–2751.Google Scholar
Verma, RP, Sahu, B and Gupta, A (2023) A miniaturized UWB bandpass filter with tunable cut-off frequencies employing rectangular open-loop defected ground structure. International Journal of Microwave and Wireless Technologies 15, 1689–1697.CrossRefGoogle Scholar
Gao, X, Feng, WJ and Che, WQ (2017) Compact ultra-wideband bandpass filter with improved upper stopband using open/shorted stubs. IEEE Microwave and Wireless Components Letters 27, 123–125.CrossRefGoogle Scholar
Jiao, L, Wu, YL, Zhuang, Z, Liu, YA and Kishk, AA (2018) Planar balanced-to-unbalanced in-phase power divider with wideband filtering response and ultra-wideband common-mode rejection. IEEE Transactions on Circuits and Systems I: Regular Papers 65, 1875–1886.Google Scholar
Bai, L, Zhuang, Y and Zeng, Z (2021) Compact quintuple notched-band UWB BPF with high selectivity and wide bandwidth. International Journal of Microwave and Wireless Technologies 13, 435–441.CrossRefGoogle Scholar
Saxena, G, Jain, P and Awasthi, YK (2021) Design and analysis of a planar UWB bandpass filter with stopband characteristics using MMR technique. International Journal of Microwave and Wireless Technologies 13, 999–1006.CrossRefGoogle Scholar
Jung, M and Min, BW (2018) A highly selective UWB bandpass filter using stepped impedance stubs. International Journal of Microwave and Wireless Technologies 10, 301–307.CrossRefGoogle Scholar
Wu, XH and Chu, QX (2012) Compact differential ultra-wideband bandpass filter with common-mode suppression. IEEE Microwave and Wireless Components Letters 22, 456–458.CrossRefGoogle Scholar
Zhu, HT, Feng, WJ, Che, WQ and Xue, Q (2011) Ultra-wideband differential bandpass filter based on transversal signal-interference concept. Electronics Letters 47, 1033–1035.CrossRefGoogle Scholar
Wang, XH, Zhang, H and Wang, BZ (2013) A novel ultra-wideband differential filter based on microstrip line structures. IEEE Microwave and Wireless Components Letters 23, 128–130.CrossRefGoogle Scholar
Shi, J, Shao, C, Chen, JX, Lu, QY, Peng, YJ and Bao, ZH (2013) Compact low-loss wideband differential bandpass filter with high common-mode suppression. IEEE Microwave and Wireless Components Letters 23, 480–482.CrossRefGoogle Scholar
Sun, J and Li, GR (2021) A balanced ultra-wideband bandpass filter based on H-type sandwich slotline. International Journal of RF and Microwave Computer-Aided Engineering 31, 1–7.CrossRefGoogle Scholar
Vélez, P, Mata-Contreras, J, Bonache, J and Martín, F (2014) Ultra-wideband (UWB) balanced bandpass filters with wide stop band and intrinsic common-mode rejection based on embedded capacitive electromagnetic bandgaps (EBG). 2014 IEEE MTT-S International Microwave Symposium (IMS2014), Tampa, FL, USACrossRefGoogle Scholar
Lu, D and Tang, XH (2017) Analysis and design of compact wide bandpass filter with ultra-wide stopband using multi-stub loaded resonator. International Journal of Microwave and Wireless Technologies 9, 591–598.CrossRefGoogle Scholar
Chai, YQ, Zhang, X, Song, XW, Hu, SB, Liu, BG, Liu, S and Wei, SS (2023) Synthesis design of wideband bandpass filter with high selectivity and harmonic suppression. IEEE Access 11, 4173–4179.CrossRefGoogle Scholar
Feng, WJ, Che, WQ, Gu, LM and Xue, Q (2023) High-selectivity wideband balanced bandpass filters using symmetrical multi‐mode resonators. IET Microwaves, Antennas & Propagation 7, 1005–1015.CrossRefGoogle Scholar
Chu, QX and Qiu, LL (2015) Wideband balanced filters with high selectivity and common-mode suppression. IEEE Transactions on Microwave Theory and Techniques 63, 3462–3468.CrossRefGoogle Scholar
Feng, WJ and Che, WQ (2012) Novel wideband differential bandpass filters based on T-shaped structure. IEEE Transactions on Microwave Theory and Techniques 60, 1560–1568.CrossRefGoogle Scholar
Wu, YL, Cui, LW, Zhang, WW, Jiao, LX, Zhuang, Z and Liu, YA (2017) High performance single-ended wideband and balanced bandpass filters loaded with stepped-impedance stubs. IEEE Access 5, 5972–5981.CrossRefGoogle Scholar
Wang, JQ and Wei, F (2024) Mode control of slotline resonator and its application to the design of balanced BPF with ultra-wide stopband. Progress In Electromagnetics Research Letters 122, 9–14.CrossRefGoogle Scholar
Liu, HW, Wang, ZB, Zhang, QF, Ma, HF, Ren, B and Wen, P (2019) Design wideband differential bandpass filter using slotline surface plasmon polaritons. IEEE Access 7, 44212–44218.CrossRefGoogle Scholar
Tseng, YC, Weng, PY and Wu, TL: Compact wideband balanced filter for eliminating radio-frequency interference on differentially-fed antennas. 2015 IEEE International Symposium on Electromagnetic Compatibility (EMC), Dresden, Germany, 2015.Google Scholar
Li, YL, Chen, JX, Chen, J, Zhang, SB and Bao, ZH (2017) Balanced bandpass filter with spurious mode suppression. Microwave and Optical Technology Letters 59, 1188–1190.CrossRefGoogle Scholar
Tripathi, VK (1975) Asymmetric coupled transmission lines in an inhomogeneous medium. IEEE Transactions on Microwave Theory and Techniques 23, 734–739.CrossRefGoogle Scholar
Tripathi, VK and Chang, CL (1978) Quasi-TEM parameters of nonsymmetrical coupled microstrip lines. International Journal of Electronics 45, 215–223.CrossRefGoogle Scholar
Huang, XD and Cheng, CH (2006) A novel microstrip dual-mode bandpass filter with harmonic suppression. IEEE Microwave and Wireless Components Letters 16, 404–406.CrossRefGoogle Scholar
Dong, G, Wang, W, Zhang, B and Liu, Y (2019) Wideband filtering power dividers with wide stopband rejection. International Journal of Microwave and Wireless Technologies 11, 7–14.CrossRefGoogle Scholar
Qiu, LL and Zhu, L (2021) Wideband filtering differential phase shifter with enhanced harmonic suppression. IEEE Microwave and Wireless Components Letters 31, 445–448.CrossRefGoogle Scholar
Wu, YL, Zhuang, Z, Liu, YA, Deng, L and Ghassemlooy, Z (2016) Wideband filtering power divider with ultra-wideband harmonic suppression and isolation. IEEE Access 4, 6876–6882.CrossRefGoogle Scholar