University of Oulu

Elias, Bashar Bahaa Qas; Soh, Ping Jack; Al-Hadi, Azremi Abdullah (2022) Design and evaluating bendability of a flexible scorpion antenna using CMA and MoM for WBAN applications. International journal of microwave and optical technology 17(4), 347-354.

Design and evaluating bendability of a flexible scorpion antenna using CMA and MoM for WBAN applications

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Author: Elias, Bashar Bahaa Qas1,2; Soh, Ping Jack1,3; Al-Hadi, Azremi Abdullah1
Organizations: 1Advanced Communication Engineering (ACE) CoE, Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis (UniMAP), Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
2Department of Communications Technology Engineering, College of Information Technology, Imam Ja’afar AlSadiq University, Baghdad 10052, Iraq
3Centre for Wireless Communications (CWC), University of Oulu, P.O. Box 4500, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.7 MB)
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Language: English
Published: International Academy of Microwave and Optical Technology, 2022
Publish Date: 2023-03-09


This paper presents a low-profile textile scorpion patch antenna for wearable applications. The modal behaviors of the proposed antenna are investigated by using the theory of characteristic modes analysis (CMA). Four characteristic modes with the same resonant frequencies and orthogonal current distributions are chosen for operation. The proposed antenna has a simple structure with an overall size of 0.74 λg × 0.74 λg × 0.06 λg (guided wavelength at 5.5 GHz). This work characterizes and estimates the final shape of the patch using the CMA method aimed at obtaining the required resonant frequency. The shape optimization is simplified, as the substrates’ influence and excitation are first excluded. This optimizes the needed time and resources in the design process, in contrast to the conventional optimization approaches made using full-wave “trial and error” simulations on a complete antenna structure. A systematic investigation of the effects of bending applied on wearable patch antennas over cylindrical surfaces is presented via extensive simulations performed using FEKO software based on both the CMA and the Method of Moments (MoM). The measurement results show that the proposed antenna has -10 dB impedance bandwidth of from 4.8 to 5.59 GHz. Moreover, the simulation results indicate that the antenna gain of 3 dBi over the whole operating bandwidth.

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Series: International journal of microwave and optical technology
ISSN: 1553-0396
ISSN-E: 1553-0396
ISSN-L: 1553-0396
Volume: 17
Issue: 4
Pages: 347 - 354
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2022 International Academy of Microwave and Optical Technology. Published in this repository with the kind permission of the publisher.