An  Area-efficient Microstrip Diplexer with a Novel Structure and Low Group Delay for Microwave Wireless Applications

Salah I. Yahya; Abbas Rezaei

doi:10.14500/aro.10753

Salah I. Yahya (1) Department of Communication and Computer Engineering, Cihan University-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. https://orcid.org/0000-0003-0642-6726

Keywords: Fractional bandiwdth, Group delay, Harmonics, Microstrip diplexer, Wireless applications

Abstract

In this work, a novel structure of a microstrip diplexer consisting of coupled patch cells is presented. It works at 2.5 GHz and 4.7 GHz for wireless applications. The proposed structure is well miniaturized with a compact area of 0.015 λ_g², fabricated on 0.787 mm substrate height. It has two wide fractional bandwidths (FBWs) of 28% and 17.9% at the lower and upper channels, respectively. Another feature of the proposed design is the low group delays, which are better than 0.4 ns for both channels. Moreover, the designed diplexer can suppress the harmonics up to 10 GHz. Meanwhile, the insertion losses at both channels are low. The design method is based on proposing an approximated equivalent LC circuit of a novel basic resonator. The information about the resonator behavior is extracted from the even and odd modes analysis of the proposed equivalent LC circuit. Finally, our introduced diplexer is fabricated and measured to verify the simulation results, where the simulated and measured results are in good agreement.

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Author Biographies

Salah I. Yahya, (1) Department of Communication and Computer Engineering, Cihan University-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 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, S cience 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.

References

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An Area-efficient Microstrip Diplexer with a Novel Structure and Low Group Delay for Microwave Wireless Applications

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