Dual-Band Folded Monopole MIMO Antennas with Enhanced Isolation

Authors

  • Likaa S. Yahya Institute of Technology Northern Technical University, Mosul, Iraq
  • Loay S. Yahya Institute of Technology Northern Technical University, Mosul, Iraq
  • Khalil H. Sayidmarie College of Electronics Engineering Ninevah University, Mosul, Iraq

DOI:

https://doi.org/10.13052/2021.ACES.J.361208

Keywords:

Dual-band antennas, Folded monopoles, L-slots, mutual coupling, U-slot

Abstract

In this paper, a compact dual-band multiple-input multiple-output (MIMO) diversity antenna is proposed. Each of the two MIMO antennas consists of two folded strips working as radiating elements that are fed by a microstrip line. The antennas operate in three WLAN bands: ISM 2.45 GHz, 5.25 GHz, and ISM 5.775 GHz. To improve the isolation at WLAN (2.4–2.48 GHz), two L-shaped slots are etched in the ground plane while a U-shaped slot is cut in the ground plane to enhance isolation at WLAN (5.15–5.35 GHz and 5.725–5.825 GHz). Three slots on the substrate between radiating patches are also employed for an extra reduction in the mutual coupling at 2.45 GHz. The antenna performance was examined by simulation employing CST Microwave Studio Software. The proposed antenna offers minimum isolation of more than 19.5 dB, a low envelope correlation coefficient (ECC) of less than 0.0016, and good radiation efficiency (∼∼80%) through the operating frequency bands. The antenna is compact, thin, and suitable for portable devices.

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Author Biographies

Likaa S. Yahya, Institute of Technology Northern Technical University, Mosul, Iraq

Likaa S. Yahya was born in Mosul, Iraq, in 1970. She received a B.Sc. degree in Electrical Engineering from the University of Mosul, Iraq, in 1992, and an M.Sc. degree in Communication Engineering from the University of Mosul, in 2002 and Ph.D. Degree in Communication Engineering from the University of Mosul, in 2017. She is currently a Lecturer at the Dept. of Electronic Techniques, Northern Technical University, Mosul, Iraq. Her interest includes multiband antenna design and antenna modeling.

Loay S. Yahya, Institute of Technology Northern Technical University, Mosul, Iraq

Loay S. Yahya was born in Mosul, Iraq, in 1963. He received a B.Sc. degree in Electrical Engineering from the University of Mosul, Iraq, in 1985, and an M.Sc. degree in Computer Engineering, University of Mosul, in 2005. He is currently an Assistant-Lecturer at the Dept. of Electronic Techniques, Northern Technical University, Mosul, Iraq. His interest includes Neural Network, Recognition Systems, and antenna design.

Khalil H. Sayidmarie, College of Electronics Engineering Ninevah University, Mosul, Iraq

Khalil H. Sayidmarie received a B.Sc. degree in Electronics and Communication Engineering from Mosul University, Iraq, in 1976, and Ph.D. Degree in Antennas and Propagation from Sheffield University, U.K. in 1981. Then he joined the College of Engineering at Mosul University in 1983 and was promoted to full professor in 1992. He worked as the head of the electrical engineering department for 9 years. Mr. Sayidmarie served as Prof. of communication engineering at the College of Engineering, University of Amman, Jordan from October 2006 to September 2009, and as the Dean of that college from September 2008 to September 2009. He has been Prof of communication engineering at the college of electronic engineering, Ninevah University since July 2002. He is now Professor Emeritus with the college of electronics engineering, Ninevah University. His research interests cover antennas, propagation, and microwaves, and he has published more than 130 papers in international journals and conferences.

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Published

2022-03-10

How to Cite

[1]
L. S. . Yahya, L. S. . Yahya, and K. H. . Sayidmarie, “Dual-Band Folded Monopole MIMO Antennas with Enhanced Isolation”, ACES Journal, vol. 36, no. 12, pp. 1569–1578, Mar. 2022.

Issue

2021: Vol 36 Iss 12

Section

Articles