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M. K. A. Rahim
Universiti Teknologi Malaysia, Johor, Malaysia
Computer Science & IT Electrical & Electronics Engineering

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SAR Levels for Irradiation by a Crumpled 900 MHz Flexible Diamond Dipole N. A. Elias; N. A. Samsuri; M. K. A. Rahim; C. J. Panagamuwa; W. Whittow
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (629.361 KB) | DOI: 10.11591/ijece.v7i3.pp1546-1553

Abstract

In this work, the antenna performance and Specific Absorption Rate (SAR) levels in a homogeneous phantom exposed to 900 MHz flexible diamond dipole antenna are investigated under different crumpling deformation conditions. The numerical simulations of the realistic complex two dimensional crumpling are performed by using Finite Integration Technique (FIT) which is applied in Computer Simulation Technology (CST) Microwave Studio. The validation of results with the industry standard DASY4 robot SAR measurement system is made possible with the use of homogenous phantom model. The 1 g, 10 g and point SAR are enhanced by 28.33 %, 36.75 % and 9.55 % respectively due to the antenna crumpling deformation. The short length ripple investigated in this paper shows the highest relative SAR increment.
Embroidery Leaf Shape Dipole Antenna Performances and Characterisation N. J. Ramly; M. K. A. Rahim; N. A. Samsuri; H. A. Majid
International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.726 KB) | DOI: 10.11591/ijece.v7i3.pp1467-1472

Abstract

In this paper, leaf shape textile antenna in ISM band has been chosen to study. The operating frequency of the dipole antenna is 2.45GHz. The effect of conductive threads with three different types of sewing has been analysed. The first type of sewing leaf shape dipole antenna is to stitch around itself and embroidered into a fleece fabric with circular follow by vertical and horizontal stitch respectively. From measured return loss, the antenna with circular stitch shows better performances with optimum resonances compared with the two types of stitching. The measured results confirm that the circular stitch is more suitable for leaf shape dipole antenna design. Thus it can be concluded that different stitch gives different results for leaf shape dipole antenna.
Co-Authors C. J. Panagamuwa H. A. Majid N. A. Elias N. A. Samsuri N. J. Ramly W. Whittow