Reduction of the peak SAR in two models of human head using metamterial
Publish place: Third National Conference and First International Conference on Applied Research in Electrical, Mechanical and Mechatronics Engineering
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ELEMECHCONF03_1029
تاریخ نمایه سازی: 9 مرداد 1395
Abstract:
This essay is going to study the peak Specific Absorption Rate (SAR) in an average of 1 gr and 10 gr of the head tissue in the frequency of 900 MHz which is the operation frequency of the first generation of cellphones. The radiating element here will be a helix antenna. Two head models were used; a Specific Anthropomorphic Mannequin (SAM) phantom and an elliptical cylinder model including five layers of biological tissues. The effect of distance between the head model and the radiating element on the exposure ratio was studied. After that a metamaterial was modeled using the Drude model and the influence of that on SAR reduction was scrutinized. Finally SAR reduction in human head using Split Ring Resonator (SRR) was studied. Simulations were done by CST Microwave Studio which uses Finite Difference Time Domain (FDTD) method with hexahedral mesh to evaluate SAR.
Keywords:
Specific Absorption Rate (SAR) , Metamaterial (MTM) , Split Ring Resonator (SRR) , Finite Difference Time Domain (FDTD)
Authors
Ali Meghdadian
Department of electrical engineering, college of engineering, Azad Islamic University of Shiraz, Shiraz, Iran
Masoud Mahzoon
College of electrical and electronic engineering, Shiraz University of Technology, Shiraz, Iran