University of Oulu

B. B. Q. Elias, A. A. Al-Radi and P. J. Soh, "Bandwidth Enhancement of Microstrip Antennas using Crossing Avoidance of Characteristic Modes," 2022 16th European Conference on Antennas and Propagation (EuCAP), 2022, pp. 1-5, doi: 10.23919/EuCAP53622.2022.9769640.

Bandwidth enhancement of microstrip antennas using crossing avoidance of characteristic modes

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Author: Elias, Bashar Bahaa Qas1,2; Al-Hadi, Azremi Abdullah1; Soh, Ping Jack1,3
Organizations: 1Advanced Communication Engineering (ACE) CoE, Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis (UniMAP), Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
2Imam Ja'afar Al-Sadiq University, Department of Communication Engineering Techniques, Baghdad 10052, Iraq
3Centre for Wireless Communications (CWC), University of Oulu, P.O. Box 4500, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2022-09-13


In this paper, a method of designing antennas by avoiding crossing between the modes is presented. This is aimed at enhancing antenna bandwidth using ground fragmentation techniques based on the characteristic modes analysis (CMA) approach. A compact and flexible Saxophone antenna and a conventional rectangular microstrip antenna both dimensioned at 30×30 mm 2 (0.66λg × 0.66λg) are designed to operate at 5.8 GHz to validate the proposed method. The proposed saxophone structure with a full ground enhances the bandwidth up to 170 MHz (2.97%) relative to the conventional antenna. This is then improved up to 890 MHz (14.67%) and 794 MHz (13.58%) when integrated with a fragmented and a partial ground plane, respectively. In comparison, the conventional antenna exhibited a bandwidth of 360 MHz (6.38%) and 410 MHz (7.25%) for these cases. Modeling is performed using FEKO software based on two approaches: the method of moments (MoM) and CMA. Results show a satisfactory agreement of the predicted resonant frequencies from simulations and measurements.

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ISBN: 978-88-31299-04-6
ISBN Print: 978-1-6654-1604-7
Article number: 9769640
DOI: 10.23919/eucap53622.2022.9769640
Host publication: 2022 16th European conference on antennas and propagation (EuCAP)
Conference: European Conference on Antennas and Propagation
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported in part by the Malaysian Ministry of Higher Education (grant no:FRGS/1/2020/TK0/UNIMAP/02/19) and in part by the Academy of Finland 6Genesis Flagship (grant no. 318927).
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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