| Presentation | 2003/7/18 Age Effect on Spatial Peak SAR of Dielectric Properties of Head Tissues for Portable Telephones Hiroki KODAMA, Jianqing WANG, Osamu FUJIWARA, Soichi WATANABE, Yukio YAMANAKA, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In evaluating the electromagnetic dosimetry of children head for portable telephones, the dielectric properties of biological tissues for adults are so far being used due to the lack of children's ones. In this paper, based on the data measured by Peyman et al for complex permittivity of rats, we derived an approximated formula for the complex permittivity of various tissues as a function of age. Applying the formula to the dielectric properties of 7-year-old and 3-year-old children head models, we analyzed numerically the spatial peak SAR for a 900 MHz portable telephone with respect to the age. As a result, we found that the dielectric properties for the children head models do not affect significantly the one-gram or ten-gram averaged spatial peak SAR, and they decrease the ten-gram averaged spatial peak SAR in the brain. The latter finding was validated via calculating the SAR penetration depth, and the former finding could be explained as an offset effect of the SAR increase at surface tissues and the rapid SAR decrease in depth tissues due to the higher dielectric properties of children than those of adults. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Portable telephone / dielectric property / age dependence / SAR / penetration depth / FDTD analysis |
| Paper # | EMCJ2003-42 |
| Date of Issue |
| Conference Information | |
| Committee | EMCJ |
|---|---|
| Conference Date | 2003/7/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Age Effect on Spatial Peak SAR of Dielectric Properties of Head Tissues for Portable Telephones |
| Sub Title (in English) | |
| Keyword(1) | Portable telephone |
| Keyword(2) | dielectric property |
| Keyword(3) | age dependence |
| Keyword(4) | SAR |
| Keyword(5) | penetration depth |
| Keyword(6) | FDTD analysis |
| 1st Author's Name | Hiroki KODAMA |
| 1st Author's Affiliation | Nagoya Institute of Technology() |
| 2nd Author's Name | Jianqing WANG |
| 2nd Author's Affiliation | Nagoya Institute of Technology |
| 3rd Author's Name | Osamu FUJIWARA |
| 3rd Author's Affiliation | Nagoya Institute of Technology |
| 4th Author's Name | Soichi WATANABE |
| 4th Author's Affiliation | Communication Research Laboratory |
| 5th Author's Name | Yukio YAMANAKA |
| 5th Author's Affiliation | Communication Research Laboratory |
| Date | 2003/7/18 |
| Paper # | EMCJ2003-42 |
| Volume (vol) | vol.103 |
| Number (no) | 223 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |