| Presentation | 2005-12-09 Double-humped Frequency Characteristics and Peak Value Estimation of Whole-body Average SAR Due to Far-field Exposure at ICNIRP Reference Level Sachiko KODERA, Akimasa HIRATA, Jianqing WANG, Osamu FUJIWARA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Electromagnetic absorption of the human body at the ICNIRP reference level shows the double-humped frequency characteristics : the first peak appears at several tens megahertz where whole-body resonance occurs and the second at 2GHz caused by the increased reference level. Absorption mechanism at these frequency bands is not well understood. Main purpose of this paper is to clarify the difference of absorption mechanism between resonance frequency and GHz bands in comparison of a whole-body average SAR for anatomically based model with those for a homogeneous anthoropomorphic model and cuboids. We employed a finite difference time domain (FDTD) algorithm incorporated with UPML(Uniaxial Perfectly Matched Layer) absorption boundary condition. As a result, we found that the electromagnetic absorption peak at resonance frequency bands greatly depends on the electric properties of tissue, while the peak absorption at GHz band is affected by the model surface area. It is also found that the calculated peak SAR for a 5-year-child model exceeds the safety limit specified in the guideline by 23%, and the cuboid model allows us to roughly predict the peak value of whole body average SAR. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ICNIRP reference level / whole-body human model / whole-body average SAR / FDTD computation / double-humped absorption mechanism |
| Paper # | EMCJ2005-116 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2005/12/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Double-humped Frequency Characteristics and Peak Value Estimation of Whole-body Average SAR Due to Far-field Exposure at ICNIRP Reference Level |
| Sub Title (in English) | |
| Keyword(1) | ICNIRP reference level |
| Keyword(2) | whole-body human model |
| Keyword(3) | whole-body average SAR |
| Keyword(4) | FDTD computation |
| Keyword(5) | double-humped absorption mechanism |
| 1st Author's Name | Sachiko KODERA |
| 1st Author's Affiliation | Nagoya Institute of Technology() |
| 2nd Author's Name | Akimasa HIRATA |
| 2nd Author's Affiliation | Nagoya Institute of Technology |
| 3rd Author's Name | Jianqing WANG |
| 3rd Author's Affiliation | Nagoya Institute of Technology |
| 4th Author's Name | Osamu FUJIWARA |
| 4th Author's Affiliation | Nagoya Institute of Technology |
| Date | 2005-12-09 |
| Paper # | EMCJ2005-116 |
| Volume (vol) | vol.105 |
| Number (no) | 454 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |