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Paper Abstract and Keywords
Presentation 2013-01-23 16:40
Study on the Helmet Antenna for Disaster
Takuma Nakao, Tsutomu Ito, Noriyuki Kagiyama, Hisashi Morishita (National Defense Academy)
Abstract (in Japanese) (See Japanese page) 
(in English) When we use a radio transceiver for a disaster (150 MHz band), one hand is detained by a talk so far. In fact, there are major restrictions of rescue operations in such a case. Therefore, we propose the structure that a transceiver, antenna and microphone are mounted on the helmet for disaster prevention which has already been served. In particular, since the wavelength is 2 m for 150 MHz, it is difficult to configure the antenna on the limited space of the helmet. Thus, we focus a folded dipole antenna that has the wideband characteristic and can be easily installed on the helmet, and fundamental characteristic is analyzed. Moreover, since the antenna is placed in the vicinity of the human head, we consider the restraint of radiation to the head direction using the human head model. As a result, we have established the method to lower the resonant frequency in the limited space of the helmet. Moreover, by loading the conductor plate inside of the helmet, we have confirmed that the radio wave toward the head is restricted.
Keyword (in Japanese) (See Japanese page) 
(in English) Folded dipole antenna / Helmet for disaster prevention / lower the resonant frequency / Restraint of radiation / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 384, AP2012-134, pp. 69-74, Jan. 2013.
Paper # AP2012-134 
Date of Issue 2013-01-16 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP  
Conference Date 2013-01-23 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Hotel Merieges (Miyazaki City) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Progation 
Paper Information
Registration To AP 
Conference Code 2013-01-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on the Helmet Antenna for Disaster 
Sub Title (in English)  
Keyword(1) Folded dipole antenna  
Keyword(2) Helmet for disaster prevention  
Keyword(3) lower the resonant frequency  
Keyword(4) Restraint of radiation  
1st Author's Name Takuma Nakao  
1st Author's Affiliation National Defense Academy (National Defense Academy)
2nd Author's Name Tsutomu Ito  
2nd Author's Affiliation National Defense Academy (National Defense Academy)
3rd Author's Name Noriyuki Kagiyama  
3rd Author's Affiliation National Defense Academy (National Defense Academy)
4th Author's Name Hisashi Morishita  
4th Author's Affiliation National Defense Academy (National Defense Academy)
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Date Time 2013-01-23 16:40:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2012-134 
Volume (vol) IEICE-112 
Number (no) no.384 
Page pp.69-74 
#Pages IEICE-6 
Date of Issue IEICE-AP-2013-01-16 

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