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Paper Abstract and Keywords
Presentation 2004-10-01 14:05
Hybrid analysis of SAR in human body for base station antennas in underground environment
Masayuki Komatsu, Jianqing Wang, Osamu Fujiwara (NIT), Yoshiaki Tarusawa, Shinji Uebayashi (NTT DoCoMo)
Abstract (in Japanese) (See Japanese page) 
(in English) In this study we have established an effective technique for dosimetric analyses of base-station antennas in an underground environment. The technique combined the ray-tracing method and the finite-difference time-domain (FDTD) method for the SAR calculation in human bodies. The ray-tracing method was used to evaluate the incident fields to the exposed subject, while the FDTD method was used to calculate the detailed SAR distributions in the human body. A scenario under an underground passage with the installation of a top loaded monopole antenna was analyzed to highlight the effectiveness of the hybrid technique together with the difference in SAR distributions from the uniform plane-wave exposure. The results showed higher whole-body averaged and peak SARs compared to a uniform plane-wave exposure with the same intensity of spatially averaged electric field. As for the SAR level due to the present base-station antenna, however, it should be much lower than the basic safety guidelines in view of the actual outputs of base-station antennas being installed in underground or indoor environments.
Keyword (in Japanese) (See Japanese page) 
(in English) Base-station antenna / SAR / ray tracing method / FDTD / safety evaluation / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 328, EMCJ2004-63, pp. 45-50, Oct. 2004.
Paper # EMCJ2004-63 
Date of Issue 2004-09-24 (EMCJ) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee EMCJ  
Conference Date 2004-10-01 - 2004-10-01 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EMCJ 
Conference Code 2004-10-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Hybrid analysis of SAR in human body for base station antennas in underground environment 
Sub Title (in English)  
Keyword(1) Base-station antenna  
Keyword(2) SAR  
Keyword(3) ray tracing method  
Keyword(4) FDTD  
Keyword(5) safety evaluation  
1st Author's Name Masayuki Komatsu  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Jianqing Wang  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
3rd Author's Name Osamu Fujiwara  
3rd Author's Affiliation Nagoya Institute of Technology (NIT)
4th Author's Name Yoshiaki Tarusawa  
4th Author's Affiliation NTT DoCoMo (NTT DoCoMo)
5th Author's Name Shinji Uebayashi  
5th Author's Affiliation NTT DoCoMo (NTT DoCoMo)
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Date Time 2004-10-01 14:05:00 
Presentation Time 25 
Registration for EMCJ 
Paper # IEICE-EMCJ2004-63 
Volume (vol) IEICE-104 
Number (no) no.328 
Page pp.45-50 
#Pages IEICE-6 
Date of Issue IEICE-EMCJ-2004-09-24 

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