A Compact Negative Group Delay Microstrip Diplexer with Low Losses for 5G Applications

Design and Analysis

  • Leila Nouri (1) Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; (2) School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam https://orcid.org/0000-0003-0506-0478
  • Salah I. Yahya (1) Department of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Kurdistan region – F.R. Iraq; (2) Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, Kurdistan region – F.R. Iraq http://orcid.org/0000-0002-2724-5118
  • Abbas Rezaei Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran http://orcid.org/0000-0003-0642-6726
  • Fawwaz A. Hazzazi Department of Electrical Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, AlKharj 11492, Saudi Arabia https://orcid.org/0000-0002-9925-673X
  • Binh N. Nhu (1) Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; (2) School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam https://orcid.org/0000-0001-5209-9055
DOI: https://doi.org/10.14500/aro.11237
Keywords: 5G, Bandpass filter, Group delay, Microstrip diplexer, Negative-group-delay

Abstract

Microstrip Diplexers play an important role in modern wireless communication systems. In this paper, a novel compact microstrip diplexer based on spiral cells is presented. The proposed resonator primarily consists of two spiral thin lines connected to a pair of coupled lines. This novel resonator is analyzed mathematically to find its behavior and tune the dimensions of the final layout easily. Using the analyzed resonator, two bandpass filters (BPFs) are designed. Then, a novel high-performance microstrip diplexer is obtained by designing and integrating these two BPFs. The center frequencies of the first and second channels of the proposed diplexer are 1.86 GHz and 4.62 GHz, respectively. The proposed diplexer boasts a remarkably small size of 0.004 λg2 and features flat channels with low insertion losses of only 0.048 dB and 0.065 dB for the first and second channels, respectively. The maximum group delays of S21 and S31 are 0.31 ns, 0.86 ns, respectively, which are good values for a modern communication system. Meanwhile, inside its passbands for some frequency ranges, its group delays are negative. Thus, using this diplexer can decrease the signal dispersion. The 1st and 2nd passbands are wide with 47.3% and 47.1% fractional bandwidths (FBW), respectively. Therefore, this diplexer can be easily and successfully used in designing high-performance RF communication systems.

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Author Biographies

Leila Nouri, (1) Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; (2) School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam

Leila Nouri received her B.Sc. and M.Sc. degrees in electronic engineering from Razi University, Kermanshah, Iran in 2005 and 2009 respectively. She received her Ph.D. in electronic engineering at the Shiraz University of Technology. She is the author of one books, more than 60 articles, and more than 5 research and industrial projects. Her research interests focus on microstrip coupler, microstrip filter, neural networks and LNAs.

Salah I. Yahya, (1) Department of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Kurdistan region – F.R. Iraq; (2) Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, Kurdistan region – F.R. Iraq

Salah I. Yahya is a Professor, joined the Department of Software Engineering at Koya University in 2010. He has a B.Sc. degree in Electrical Engineering, M.Sc. degree in Electronics and Communication Engineering and Ph.D. degree in Communication and Microwave Engineering. He is a Consultant at the Iraqi Engineering Union. Dr. Yahya is a senior member of the IEEE-USA and a member of AMTA-USA, SDIWC-Hong Kong. His research interest include; Antenna, Microwaves, EMW propagation, Numerical Dosimetry, Microwave passive components design, ANN.

Abbas Rezaei, Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran

Abbas Rezaei is an Assistance Professor of Electrical Engineering in Kermanshah University of Technology. He received the B.Sc., M.Sc. and Ph.D. degrees in Electronics Engineering from Razi University, Kerman-shah, Iran, in 2005, 2009 and 2013, respectively. His current research interests include RF and microwave circuits, computational intelligence and nanotechnology.

Fawwaz A. Hazzazi , Department of Electrical Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, AlKharj 11492, Saudi Arabia

Fawwaz H. Hazzazi got his Bachelor of Science (B.S.) degree in Electrical engineering at the Prince Sattam Bin Abdulaziz University-affiliated College of Engineering in Kharj, Saudi Arabia. He earned an M.S. degree in Electrical and Computer Engineering from the University of Maine in Orono, United States. He completed his Ph.D. degree in Electrical Engineering at Louisiana State University in Baton Rouge, Louisiana, United States. He has both industry and academic experience. His current research focuses on the characterization and fabrication of nanomaterials for the production of nanoscale electronic applications, electronic sensors of the next generation.

Binh N. Nhu, (1) Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; (2) School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam

B.N. Nhu (Binh Nguyen Le) is a dedicated researcher and academic in the field of Engineering. She obtained her B.Sc. and M.Sc. degrees in Engineering from Da Nang University of Technology in 2011 and 2016, respectively. She is pursuing her Ph.D. in Engineering, further expanding her knowledge and expertise in the field. As a member of the Research and Development Institute at Duy Tan University, Le Nhu Binh actively contributes to the advancement of knowledge and innovation in engineering. Her research focuses on the applications of artificial intelligence in engineering, as well as exploring sustainable solutions in the field of engineering.

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Published
2023-08-25
How to Cite
Nouri, L., Yahya, S. I., Rezaei, A., Hazzazi , F. A. and Nhu, B. N. (2023) “A Compact Negative Group Delay Microstrip Diplexer with Low Losses for 5G Applications: Design and Analysis”, ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, 11(2), pp. 17-24. doi: 10.14500/aro.11237.
Issue
Vol. 11 No. 2 (2023): Issue Twenty One
Section
Articles

Copyright (c) 2023 Leila Nouri, Salah I. Yahya, Abbas Rezaei, Fawwaz A. Hazzazi , Binh N. Nhu

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