Hostname: page-component-cb9f654ff-mwwwr Total loading time: 0 Render date: 2025-08-28T20:49:44.889Z Has data issue: false hasContentIssue false
  • English
  • Français

Design and analysis of a compact microstrip lowpass–bandpass diplexer with good performance for wireless applications

Published online by Cambridge University Press:  03 January 2023

Abbas Rezaei Open the ORCID record for Abbas Rezaei [Opens in a new window] ,
Salah I. Yahya Open the ORCID record for Salah I. Yahya [Opens in a new window]  and
Leila Nouri Open the ORCID record for Leila Nouri [Opens in a new window]
Abbas Rezaei
Affiliation:
Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran
Salah I. Yahya
Affiliation:
Department of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Iraq Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, Iraq
Leila Nouri*
Affiliation:
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam Faculty of Electrical – Electronic Engineering, Duy Tan University, Da Nang 550000, Vietnam
*
Author for correspondence: Leila Nouri, E-mail: leilanouri@duytan.edu.vn
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper presents the design of a novel lowpass–bandpass diplexer with compact size and good performance using microstrip cells. For this purpose, two microstrip lowpass and bandpass filters are separately designed and mathematically analyzed. The proposed microstrip diplexer has a novel and simple structure. It occupies a compact area of 0.037 λg2 (722 mm2), and its insertion loss and S11 at both channels are low. The insertion loss at the lower and upper channels is only 0.047 and 0.16 dB, respectively. Meanwhile, both channels are flat with the maximum group delay of 1.68 ns which is the lowest compared to the previously reported diplexers mentioned in this paper. To design the proposed diplexer, first, a lowpass diplexer with good performance is designed which has low losses and a good figure of merit. It has a flat passband with a sharp roll-off. Then, to achieve the proposed diplexer, a bandpass resonator is added to the lowpass filter without any extra matching circuit, which saves the overall size. The proposed diplexer is designed, simulated, and fabricated, where the simulation and measurement results are close.

Keywords

Group delayinsertion losslowpass–bandpassmicrostrip diplexerwireless

Information

Type
Filters
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1099 - 1107
Check for updates
Copyright
© The Author(s), 2023. 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

Elden, S and Gorur, AK (2021) Design of a compact lowpass-bandpass diplexer with high isolation. Progress in Electromagnetics Research Letters 97, 21–26.Google Scholar
Deng, P-H and Tsai, J-T (2013) Design of microstrip lowpass-bandpass diplexer. IEEE Microwave and Wireless Components Letters 23, 332–334.CrossRefGoogle Scholar
Hayati, M, Rezaei, A and Noori, L (2019) Design of a high-performance lowpass–bandpass diplexer using a novel microstrip structure for GSM and WiMAX applications. IET Circuits, Devices & Systems 13, 361–367.CrossRefGoogle Scholar
Heshmati, H and Roshani, S (2018) A miniaturized lowpass bandpass diplexer with high isolation. AEU – International Journal of Electronics and Communications 87, 87–94.CrossRefGoogle Scholar
Nouri, L, Yahya, S and Rezaei, A (2020) Design and fabrication of a low-loss microstrip lowpass-bandpass diplexer for WiMAX applications. China Communications 17, 109–120.CrossRefGoogle Scholar
Rezaei, A, Noori, L and Jamaluddin, MH (2019) Novel microstrip lowpass-bandpass diplexer with low loss and compact size for wireless applications. AEU-International Journal of Electronics and Communications 101, 152–159.Google Scholar
Yahya, SI, Rezaei, A and Nouri, L (2020) A novel miniaturized microstrip lowpass bandpass diplexer using patch and interdigital cells for wireless networks. AEU-International Journal of Electronics and Communications 126, 1434–8411.Google Scholar
Capstick, M-H (1999) Microstrip lowpass-bandpass diplexer topology. Electronics Letters 35, 1958–1960.CrossRefGoogle Scholar
Noori, L and Rezaei, A (2017) Design of a microstrip diplexer with a novel structure for WiMAX and wireless applications. AEU-International Journal of Electronics and Communications 77, 18–22.Google Scholar
Rezaei, A and Noori, L (2018) Compact low-loss microstrip diplexer using novel engraved semi patch cells for GSM and WLAN applications. AEU-International Journal of Electronics and Communication 87, 158–163.Google Scholar
Rezaei, A, Yahya, SI, Noori, L and Jamaluddin, MH (2019) Design of a novel wideband microstrip diplexer using artificial neural network. Analog Integrated Circuits and Signal Processing 101, 57–66.CrossRefGoogle Scholar
Majdi, KA and Mezaal, YS (2022) Microstrip diplexer for recent wireless communities. Periodicals of Engineering and Natural Sciences 10, 387–396.CrossRefGoogle Scholar
Hussein, HA, Mezaal, YS and Alameri, BM (2021) Miniaturized microstrip diplexer based on FR4 substrate for wireless communications. Elektronika Ir Elektrotechnika 27, 34–40.CrossRefGoogle Scholar
Yahya, SI, Rezaei, A and Nouri, L (2021) The use of artificial neural network to design and fabricate one of the most compact microstrip diplexers for broadband L-band and S-band wireless applications. Wireless Networks 27, 663–676.CrossRefGoogle Scholar
Yahya, SI, Rezaei, A and Yahya, RI (2022) A new ANFIS-based hybrid method in the design and fabrication of a high-performance novel microstrip diplexer for wireless applications. Journal of Circuits, Systems and Computers 31, 2250050.CrossRefGoogle Scholar
Hong, JS and Lancaster, MJ (2001) Microstrip Filters for RF/Microwave Applications. Hoboken, New Jersey, USA: John Wiley & Sons.CrossRefGoogle Scholar
Rezaei, A, Noori, L and Mohammadi, H (2017) Design of a novel compact microstrip diplexer with low insertion loss. Microwave and Optical Technology Letters 59, 1672–1676.CrossRefGoogle Scholar