Presentation | 2003/11/13 Attenuation characteristics of SAR with an antenna close to a lossy media Shoichi KAJIWARA, Atsushi YAMAMOTO, Koichi OGAWA, Akihiro OZAKI, Yoshio KOYANAGI, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | In this paper, we have considered the attenuation characteristics of SAR in a lossy media with regard to the distance between an antenna and the media. Analysis and measurement were performed by using a dipole antenna at 900MHz and a COST 244 cube phantom. From this, we introduce an expression representing the attenuation characteristics of SAR, which takes a loss due to a spatial spread of electromagnetic energy into consideration. In the case where an antenna is set at a spacing of more than λ/2π from the media, the attenuation characteristics of SAR are obtained from those of plane waves in the lossy media. In the case where a half-wavelength dipole antenna is located close to the media at a distance of less λ/2π, the attenuation characteristics of SAR are calculated from an expression that includes a loss caused by a spread of energy as a cylindrical wave. Moreover, when the length of antenna becomes short, it is found that a spatial attenuation factor caused by a spherical wave should be taken into account. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | Lossy Media / SAR / Attenuation Characteristics / energy / dipole antenna |
Paper # | A・P2003-160,RCS2003-166 |
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Conference Information | |
Committee | AP |
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Conference Date | 2003/11/13(1days) |
Place (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Antennas and Propagation (A・P) |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Attenuation characteristics of SAR with an antenna close to a lossy media |
Sub Title (in English) | |
Keyword(1) | Lossy Media |
Keyword(2) | SAR |
Keyword(3) | Attenuation Characteristics |
Keyword(4) | energy |
Keyword(5) | dipole antenna |
1st Author's Name | Shoichi KAJIWARA |
1st Author's Affiliation | Matsuchita Electric Industrial Co., Ltd() |
2nd Author's Name | Atsushi YAMAMOTO |
2nd Author's Affiliation | Matsuchita Electric Industrial Co., Ltd |
3rd Author's Name | Koichi OGAWA |
3rd Author's Affiliation | Matsuchita Electric Industrial Co., Ltd |
4th Author's Name | Akihiro OZAKI |
4th Author's Affiliation | Matsuchita Electric Industrial Co., Ltd |
5th Author's Name | Yoshio KOYANAGI |
5th Author's Affiliation | Panasonic Mobile Communications Co., Ltd. |
Date | 2003/11/13 |
Paper # | A・P2003-160,RCS2003-166 |
Volume (vol) | vol.103 |
Number (no) | 456 |
Page | pp.pp.- |
#Pages | 6 |
Date of Issue |