Hostname: page-component-848d4c4894-mwx4w Total loading time: 0 Render date: 2024-07-04T02:09:12.948Z Has data issue: false hasContentIssue false
  • English
  • Français

Compact microstrip bandpass filter using dual closed-loop stepped impedance resonator

Published online by Cambridge University Press:  22 March 2018

Salif N. Dembele Open the ORCID record for Salif N. Dembele [Opens in a new window] ,
Ting Zhang ,
Jingfu Bao  and
Denis Bukuru
Salif N. Dembele
Affiliation:
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
Ting Zhang
Affiliation:
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
Jingfu Bao*
Affiliation:
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
Denis Bukuru
Affiliation:
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
*
Author for correspondence: Jingfu Bao, E-mail: baojingfu@uestc.edu.cn
Get access Rights & Permissions [Opens in a new window]

Abstract

A dual closed-loop stepped impedance resonator (DCLSIR) is investigated and used in designing a compact microstrip bandpass filter (BPF). The proposed DCLSIR is symmetrical; as a result, the symmetric characteristics of the resonator have been used. The design equations are derived and used to support the circuit design. The center frequency, position of transmission zeros, and fractional bandwidth (FBW) are easily tuned by changing the physical dimensions of the resonator. Three transmission zeros are generated to improve the performance in the upper stopband. A DCLSIR prototype BPF is fabricated with a center frequency of 9.3 GHz, and evaluated to validate the design concept. The measured FBW is 9.25%, the insertion loss is 1.58 dB, and the return loss is over 17 dB. The measurement results agree well with the simulation results.

Keywords

EM field theoryfilters
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 4 , May 2018 , pp. 405 - 411
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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.)

References

1.Gan, D-C, He, S-B, Sun, M-J, Wei, X-B, Tang, W and Shi, Y (2016) Compact dual-layer bandpass filter using novel stepped-impedance resonators. Electromagnetics 36(1), 17–23.Google Scholar
2.Xu, H-X, Wang, G-M, Xu, Z-M, Chen, X, Yu, Z and Geng, L (2012) Dual-shunt branch circuit and harmonic suppressed device application. Applied Physics A: Solids and Surfaces 108(2), 497–502.CrossRefGoogle Scholar
3.Mezaal, YS and Ali, JK (2016) Investigation of dual-mode microstrip bandpass filter based on SIR technique. PLoS ONE 11(10), e0164916.Google Scholar
4.Jantree, J and Akkaraekthalin, P (2007) A compact open-loop resonator filter with a wide stopband response. AEU – International Journal of Electronics and Communication 61(4), 249–254.CrossRefGoogle Scholar
5.Xu, H-X, Wang, G-M and Liang, J-G (2011) Novel composite right/left handed transmission lines using fractal geometry and compact microwave devices application. Radio Science 46(RS5008), 1–11.Google Scholar
6.Xu, HX, Wang, GM and Zhang, CX (2010) Fractal-shaped UWB bandpass filter based on composite right/left handed transmission line. Electronics Letters 46(4), 285–287.Google Scholar
7.Luo, S, Zhu, L and Sun, S (2010) A dual-band ring-resonator bandpass filter based on two pairs of degenerate mode. IEEE Transactions on Microwave Theory and Techniques 58(12), 3427–3432.Google Scholar
8.Makimoto, M (2000) Microwave Resonators and Filters for Wireless Communication. New York: Springer.Google Scholar
9.Sun, S and Zhu, L (2005) Compact dual-band microstrip bandpass filter without external feeds. IEEE Microwave and Wireless Components Letters 15(10), 644–646.Google Scholar
10.Chiou, YC, Hsieh, PY and Kuo, JT (2008) Compact stepped-impedance resonator bandpass filter with two wide spread passbands. Microwave Conference, Asia-Pacific.Google Scholar
11.Zhang, S and Zhu, L (2013) Synthesis design of dual-band filters with lambda/4 stepped-impedance resonators. IEEE Transactions on Microwave Theory and Techniques 61(5), 1812–1819.CrossRefGoogle Scholar
12.Xiao, J-K, Li, Y, Zhu, M, Zhao, W, Tian, L and Zhu, W-J (2015) High selective bandpass filter with mixed electromagnetic coupling and source-load coupling. AEU – International Journal of Electronics and Communication 69(4), 753–758.Google Scholar
13.Xu, H-X, Wang, G-M, Zhang, C-X and Peng, Q (2011) Hilbert-shaped complementary single split ring resonator and low-pass filter with ultra-wide stopband, excellent selectivity and low insertion-loss. AEU – International Journal of Electronics and Communication 65(11), 901–905.Google Scholar
14.Chin, K-S and Chen, D-J (2009) Novel microstrip bandpass filters using direct-coupled triangular stepped-impedance resonators for spurious suppression. Progress in Electromagnetics Research Letters 12, 11–20.CrossRefGoogle Scholar
15.Won, YS, Bae, KU and Myung, NH (2012) Design method for bandpass filter with enhanced stopband rejection using spiral SIRs. Electronics Letters 48(17), 1067–1068.CrossRefGoogle Scholar
16.Lin, W-J, Li, J-Y, Lin, D-B, Chen, L-S and Houng, M-P (2010) Multi-suppression of microstrip bandpass filter using split-mode excitations. Journal of Electromagnetic Waves and Applications 24(11–12), 1501–1510.CrossRefGoogle Scholar
17.Li, Z and Wu, K-L (2017) Direct synthesis and design of wideband bandpass filter with composite series and shunt resonators. IEEE Transactions on Microwave Theory and Techniques 65(10), 3789–3800.Google Scholar
18.Liu, H, Lei, J, Wan, J, Wang, Y, Yang, F and Peng, S (2013) A miniaturized dual-mode bandpass filter using slot spurline technique. International Journal of Antennas and Propagation 2013, 1–6.Google Scholar
19.Chu, R, Mao, J-F and Zhou, L (2010) A meandering dual-mode bandpass filter with rectangular-loop perturbation. Microwave and Optical Technology Letters 52(10), 2356–2359.Google Scholar
20.Li, YC, Zhang, XY and Xue, Q (2010) Bandpass filter using discriminating coupling for extended out-of-band suppression. IEEE Microwave and Wireless Components Letters 20(7), 369–371.Google Scholar
21.Yu, C-C and Chang, K (1997) Transmission-line analysis of a capacitively coupled microstrip-ring resonator. IEEE Transactions on Microwave Theory and Techniques 45(11), 2018–2024.Google Scholar
22.Hong, J-S and Lancaster, MJ (2000) Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies. IEEE Transactions on Microwave Theory and Techniques 48(7), 1098–1107.CrossRefGoogle Scholar
23.Hong, J-S and Lancaster, MJ (1996) Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters. IEEE Transactions on Microwave Theory and Techniques 44(11), 2099–2109.Google Scholar
24.Hunter, I (2001) Theory and Design of Microwave Filters. Institution of Engineering and Technology, London, UK.Google Scholar