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Paper Abstract and Keywords
Presentation 2021-03-05 13:55
Distance dependence of power absorption ratio in a 3-layer half-space model exposed to an E-dipole in millimeter waves
Kenta Someya, Yoshitsugu Kamimura (Utsunomiya Univ.), Ken Sato (NITHC) EMCJ2020-79
Abstract (in Japanese) (See Japanese page) 
(in English) In the next-generation mobile communication system 5G, it is expected that the chance of radiating
millimeter-wave band radio waves near the human body will increase.
At that time, it is important how the power absorption ratio to the human body changes depending
on the distance between the antenna and the human body.
The authors previously applied Sommerfeld's half-space problem to theoretically analyze this problem
with a single-layer planar model in which small dipoles are placed vertically or horizontally
on the surface of the human body.
However, the actual surface of the human body has a multi-layered structure.
In order to have a more realistic discussion, the authors have constructed a theory using a three-layer model
and examined the difference from the single-layer model.
As a result, a clear difference was confirmed in the calculation of the power absorption ratio at 6 to 10 GHz,
but it was found that the single layer model can be sufficiently approximated at 20 GHz and above.
Keyword (in Japanese) (See Japanese page) 
(in English) multilayer / planar model / small dipole / absorption enery flow / RF protection guidelines / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 420, EMCJ2020-79, pp. 35-39, March 2021.
Paper # EMCJ2020-79 
Date of Issue 2021-02-26 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
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Conference Information
Committee EMCJ MICT  
Conference Date 2021-03-05 - 2021-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2021-03-EMCJ-MICT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Distance dependence of power absorption ratio in a 3-layer half-space model exposed to an E-dipole in millimeter waves 
Sub Title (in English)  
Keyword(1) multilayer  
Keyword(2) planar model  
Keyword(3) small dipole  
Keyword(4) absorption enery flow  
Keyword(5) RF protection guidelines  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Kenta Someya  
1st Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
2nd Author's Name Yoshitsugu Kamimura  
2nd Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
3rd Author's Name Ken Sato  
3rd Author's Affiliation National Institute of Technology, Hachinohe College (NITHC)
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Speaker Author-1 
Date Time 2021-03-05 13:55:00 
Presentation Time 20 minutes 
Registration for EMCJ 
Paper # EMCJ2020-79 
Volume (vol) vol.120 
Number (no) no.420 
Page pp.35-39 
#Pages
Date of Issue 2021-02-26 (EMCJ) 


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