Design of miniaturized double-negative material for specific absorption rate reduction in human head

In this study, a double-negative triangular metamaterial (TMM) structure, which exhibits a resounding electric response at microwave frequency, was developed by etching two concentric triangular rings of conducting materials. A finite-difference time-domain method in conjunction with the lossy-Drude...

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Bibliographic Details
Published in:PloS one 2014-10, Vol.9 (10), p.e109947-e109947
Main Authors: Faruque, Mohammad Rashed Iqbal, Islam, Mohammad Tariqul
Format: Article
Language:English
Subjects:
Absorption
Algorithms
Alzheimer's disease
Biology and Life Sciences
Cellular telephones
Cheek
Computer simulation
Efficiency
Electromagnetism
Engineering and Technology
Etching
Finite difference method
Humans
Medicine and Health Sciences
Metamaterials
Models, Theoretical
Permeability
Physical Sciences
Propagation
Reduction
Reproducibility of Results
Time domain analysis
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Summary:In this study, a double-negative triangular metamaterial (TMM) structure, which exhibits a resounding electric response at microwave frequency, was developed by etching two concentric triangular rings of conducting materials. A finite-difference time-domain method in conjunction with the lossy-Drude model was used in this study. Simulations were performed using the CST Microwave Studio. The specific absorption rate (SAR) reduction technique is discussed, and the effects of the position of attachment, the distance, and the size of the metamaterials on the SAR reduction are explored. The performance of the double-negative TMMs in cellular phones was also measured in the cheek and the tilted positions using the COMOSAR system. The TMMs achieved a 52.28% reduction for the 10 g SAR. These results provide a guideline to determine the triangular design of metamaterials with the maximum SAR reducing effect for a mobile phone.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0109947