Design and Fabrication of a Novel Ultra Compact Microstrip Diplexer Using Interdigital and Spiral Cells

  • Salah I. Yahya (1) Department of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Iraq; (2) Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, 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
DOI: https://doi.org/10.14500/aro.10819
Keywords: Compact size, Diplexer, Low-loss, Microstrip, Harmonics, Group delay

Abstract

A dual-band bandpass-bandpass microstrip diplexer with very small size and good performance is designed in this work. The proposed diplexer has a novel structure which is introduced for the first time in this paper. In comparison with the previously reported diplexers, it occupies the most compact size of 0.002 λg2 (226.7 mm2), fabricated on 0.787 mm dielectric substrate height. The resonance frequencies of the presented diplexer are located at 0.76 GHz and 1.79 GHz making it suitable for the global system for mobile communications (GSM) applications. It has a wide flat channels with two fractional bandwidths (FBWs) of 41.1% and 50%. Another feature of the proposed diplexer is its ability to suppress the harmonics. It can attenuate the 1st to 7th harmonics. Moreover, it has low insertion losses and low group delays at both channels while the isolation and return losses are acceptable. Finally, the proposed diplexer is fabricated and measured to verify the simulation results, where a good agreement between the simulation and measurement results is obtained.

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Author Biographies

Salah I. Yahya, (1) Department of Communication and Computer Engineering, Cihan University-Erbil, Erbil, Iraq; (2) Department of Software Engineering, Faculty of Engineering, Koya University, Koya KOY45, 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 has many scientific publications; (2) books [1] and [2], (13) Journal Articles and more than (31) conference papers. He is a senior member of the IEEE-USA and a member of AMTA-USA, SDIWC-Hong Kong. Dr. Yahya is a regular reviewer of the Electromagnetics Academy, Cambridge, USA, PIERS Journals publications, since 2009, Science and Engineering of Composite Materials journal and International Journal of Applied Electromagnetics and Mechanics, as well as, a regular reviewer of SDIWC conferences. His h-index is (7). (see TAP). [e-mail: salah.ismaeel@koyauniversity.org]

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. Abbas Rezaei received the B.Sc., M.Sc. and Ph.D. 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.

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ARO Journal: Volume 9, No. 1 (2021)
Published
2021-06-30
How to Cite
Yahya, S. I. and Rezaei, A. (2021) “Design and Fabrication of a Novel Ultra Compact Microstrip Diplexer Using Interdigital and Spiral Cells”, ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, 9(1), pp. 103-108. doi: 10.14500/aro.10819.
Issue
Vol. 9 No. 1 (2021): Issue Sixteen
Section
Articles

Copyright (c) 2021 Salah I. Yahya, Abbas Rezaei

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