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Ultra-wide stopband lowpass filters using ring resonators

Published online by Cambridge University Press:  08 March 2021

Mohsen Hayati Open the ORCID record for Mohsen Hayati [Opens in a new window] ,
Sajjad Mohanad Mustafa ,
Farzin Shama Open the ORCID record for Farzin Shama [Opens in a new window]  and
Hamed Abbasi
Mohsen Hayati
Affiliation:
Electrical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran
Sajjad Mohanad Mustafa
Affiliation:
Electrical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran
Farzin Shama*
Affiliation:
Electrical Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Hamed Abbasi
Affiliation:
Electrical Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
*
Author for correspondence: Farzin Shama, Email: f.shama@aut.ac.ir
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Abstract

A microstrip-based lowpass filter (LPF) containing modified ring structures has been presented. Ring resonators are used to form a sharp transition region. In addition, rectangular- and tapered-shaped suppressing cells are used to create an ultra-wide stopband region. By combining the designed ring resonator and suppressors, an LPF has been designed with −3 dB cut-off frequency at 1.83 GHz. A sharp transition region has been achieved from 1.83 (at −3 dB) to 2.1 GHz (at −60 dB). A stopband region has been concluded from 2 to 21 GHz (with the corresponding attenuation level of at least 20 dB). The measured insertion loss is better than 0.1 dB (equal to a return loss of 18.1 dB) in the passband region. The proposed circuit is fabricated and measured. The measured results have an appropriate adaption with the simulated results.

Keywords

Microstriplowpass filterring resonators
Type
Filters
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 9 , November 2021 , pp. 880 - 886
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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References

Hayati, M, Abbasi, H and Shama, F (2014) Microstrip lowpass filter with ultrawide stopband and sharp roll-off. Arabian Journal for Science and Engineering 39, 6249–6253. doi: 10.1007/s13369-014-1237-x.CrossRefGoogle Scholar
Xu, S, Ma, K-L, Meng, F and Yeo, KS (2012) DGS embedded transformed radial stub for ultra-wide stopband lowpass filter. Electronics Letters 48, 1473–1475. doi: 10.1049/el.2012.2568.CrossRefGoogle Scholar
Li, J-L, Qu, S-W and Xue, Q (2009) Compact microstrip lowpass filter with sharp roll-off and wide stop-band. Electronics Letters 45, 110–111. doi: 10.1049/el:20093246.CrossRefGoogle Scholar
Hayati, M, Shama, F and Abbasi, H (2013) Compact microstrip lowpass filter with wide stopband and sharp roll-off using tapered resonator. International Journal of Electronics 100, 1751–1759. doi: 10.1080/00207217.2013.769180.CrossRefGoogle Scholar
Velidi, VK and Sanyal, S (2011) Sharp roll-off lowpass filter with wide stopband using stub-loaded coupled-line hairpin unit. IEEE Microwave and Wireless Components Letters 21, 301–303. doi: 10.1109/LMWC.2011.2132120.CrossRefGoogle Scholar
Wei, F, Chen, L and Shi, X-W (2012) Compact lowpass filter based on coupled-line hairpin unit. Electronics Letters 48, 379–381. doi: 10.1049/el.2011.3811.CrossRefGoogle Scholar
Tu, W-H and Chang, K (2005) Compact microstrip low-pass filter with sharp rejection. IEEE Microwave and Wireless Components Letters 15, 404–406. doi: 10.1109/LMWC.2005.850479.Google Scholar
Zhang, CF (2009) Compact and wide stopband lowpass filter with novel comb CMRC. International Journal of Electronics 96, 749–754. doi: 10.1080/00207210902838610.CrossRefGoogle Scholar
Wang, J, Cui, H and Zhang, G (2012) Design of compact microstrip lowpass filter with ultra-wide stopband. Electronics Letters 48, 854–856. doi: 10.1049/el.2012.1362.CrossRefGoogle Scholar
Hayati, M, Khodadoost, M and Abbasi, H (2017) Microstrip lowpass filter with wide stopband and sharp roll-off using modified radial stub resonator. International Journal of Microwave and Wireless Technologies 9, 499–504. doi: 10.1017/S1759078716000556.CrossRefGoogle Scholar
Kolahi, A and Shama, F (2018) Compact microstrip lowpass filter with flat group-delay using triangle-shaped resonators. AEU-International Journal of Electronics and Communications 83, 433–438. doi: 10.1016/j.aeue.2017.10.022.CrossRefGoogle Scholar
Hiedari, B and Shama, F (2018) A harmonics suppressed microstrip cell for integrated applications. AEU-International Journal of Electronics and Communications 83, 519–522. doi: 10.1016/j.aeue.2017.11.009.CrossRefGoogle Scholar
Shama, F, Hayati, M and Ekhteraei, M (2018) Compact microstrip lowpass filter using meandered unequal T-shaped resonator with ultra-wide rejection band. AEU-International Journal of Electronics and Communications 85, 78–83. doi: 10.1016/j.aeue.2017.12.038.CrossRefGoogle Scholar
Ekhteraei, M, Hayati, M and Shama, F (2019 Jun 15) A compact lowpass filter with ultra-high figure-of-merit for integrating with class-F/F − 1 power amplifiers. Analog Integrated Circuits and Signal Processing 99, 655–667. doi: 10.1007/s10470-018-01387-6.CrossRefGoogle Scholar
Hayati, M, Shama, F and Ekhteraei, M (2016 Oct 1) Miniaturized microstrip suppressing cell with wide stopband. Applied Computational Electromagnetics Society Journal 31, 1244–1249.Google Scholar
Han, Y, Liu, Z, Zhang, C, Mei, C, Chen, Q, Hu, K and Yuan, S (2019) A flexible microstrip low-pass filter design using asymmetric Pi-shaped DGS. IEEE Access 7, 49999–50006. doi: 10.1109/ACCESS.2019.2910350.CrossRefGoogle Scholar
Moloudian, G. and Bahrami, S. (2019). Design and fabrication of a continuous tunable microstrip lowpass filter with wide stopband and sharp response. International Journal of RF and Microwave Computer-Aided Engineering, 29, e21759. https://doi.org/10.1002/mmce.21759CrossRefGoogle Scholar
Rekha, T. K., Abdulla, P., Jasmine, P. M. and Anu, A. R. (2020). Compact microstrip lowpass filter with high harmonics suppression using defected structures. AEU-International Journal of Electronics and Communications, 115, 153032. https://doi.org/10.1016/j.aeue.2019.153032CrossRefGoogle Scholar
Hong, JS and Lancaster, MJ (2001) Microstrip Filters for RF/Microwave Applications. New York: Wiley.CrossRefGoogle Scholar
Zhang, X., Ugurbil, K. and Chen, W. (2003). A microstrip transmission line volume coil for human head MR imaging at 4 T. Journal of Magnetic Resonance, 161, 242–251. https://doi.org/10.1016/S1090-7807(03)00004-1CrossRefGoogle Scholar
Benningshof, O. W. B., Mohebbi, H. R., Taminiau, I. A. J., Miao, G. X. and Cory, D. G. (2013). Superconducting microstrip resonator for pulsed ESR of thin films. Journal of Magnetic Resonance, 230, 84–87. https://doi.org/10.1016/j.jmr.2013.01.010CrossRefGoogle ScholarPubMed