Uncertainty of the One-Gram Averaged Spatial Peak SAR in Human Head for Portable Telephones due to Average Procedures
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- Wang Jianqing
- Nagoya Institute of Technology
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- Joukou Takahiro
- Nagoya Institute of Technology
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- Fujiwara Osamu
- Nagoya Institute of Technology
Bibliographic Information
- Other Title
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- Uncertainty of the One-Gram Averaged Spatial Peak SAR in Human Head for Portables Telephones due to Average Procedures
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Abstract
The U. S. Federal Communication Commission (FCC) has required the routine specific absorption rate (SAR) evaluation of portable telephones since 1997. The applicable SAR limit is 1.6W/kg as averaged over any one gram of tissue, defined as a tissue volume in the shape of a cube. Because of the irregular surface of the human head and tissue heterogeneity, computing the one-gram averaged spatial peak SAR in the shape of a cube is not so easy. A lack of standardized procedure for computing the one-gram averaged spatial peak SAR is resulting in confusion in the SAR assessment. In this paper, the SAR in an anatomically based human head model is computed using the finite-difference time-domain (FDTD) method, and the uncertainties of different four kinds of one-gram average procedures are evaluated numerically. The results show that an uncertainty up to 2.4 times may exists at 900 MHz. A nearly 1×1×1 cm cube with a mass of just one gram, but not containing the air cells, seems to be reasonable for the one-gram average of SARs.
Journal
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- IEEJ Transactions on Electronics, Information and Systems
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IEEJ Transactions on Electronics, Information and Systems 119 (1), 2-8, 1999
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390282679585112448
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- NII Article ID
- 130006844164
- 10002815836
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- NII Book ID
- AN10065950
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- ISSN
- 13488155
- 03854221
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- NDL BIB ID
- 971195
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed