FDTD analysis of human head-mobile phone interaction in terms of specific absorption rate calculations and antenna design

2002 ◽  
Author(s):  
F. Akleman ◽  
L. Sevgi
Keyword(s):  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Human Head ◽  
Antenna Design ◽  
Specific Absorption

scholarly journals Reduction of Specific Absorption Rate using Carbon foam Inside Enclosures

2020 ◽  
Vol 9 (3) ◽  
pp. 1684-1688
Keyword(s):  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Human Head ◽  
Carbon Foam ◽  
Uniform Mesh ◽  
Specific Absorption ◽  
Quarter Wavelength ◽  
Novel Method ◽  
Rf Safety

The interaction of a mobile antenna and a passenger is analyzed inside a metallic enclosure. The specific absorption rate (SAR) of the passenger in the elevator using a mobile phone is calculated. A standardized model of human head is filled with liquid that simulates the RF absorption characteristics. The non-uniform mesh technique in frequency domain is employed to obtain 1g SAR [Specific Absorption Rate] and other important parameters. The mobile phone is modeled as a quarter wavelength Planar Inverted F Antenna (PIFA), and it is of .01m from the head. PIFA is operated at frequencies of 900 and 1800MHz with transmitting power .3 W . It is observed that the values of SAR inside the metallic enclosure exceeds the RF safety limits. Therefore, this project proposes a novel method to reduce the SAR by using carbon foam which absorbs microwave radiation. Simulated results have evidenced the efficiency of the proposed technique of SAR reduction inside the enclosures.

Application of Auxiliary Antenna Elements for SAR Reduction in the Human Head

2014 ◽  
Vol 974 ◽  
pp. 288-292 ◽  
Author(s):  
M.I. Hossain ◽  
Rashed Iqbal Faruque Mohammad ◽  
M.T. Islam ◽  
N.H.M. Hanafi
Keyword(s):  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Cellular Phone ◽  
Human Head ◽  
Reduction Technique ◽  
Health Hazards ◽  
Bandwidth Efficiency ◽  
Specific Absorption ◽  
Reduction Methods

The aim of this paper is to review various techniques smeared in the last decade for the elevation of low Specific Absorption Rate (SAR) of cellular phone using auxiliary antenna elements. Considering health hazards of EM radiation from mobile phone, it is discernible that a mobile phone antenna must have low SAR characteristics which can be achieved by imposing SAR reduction methods. There are some abridgments for every reduction technique which restrain the extensive use of available mobile phone considering bandwidth, efficiency, size, cost and easy implementation. Among all of SAR reduction methods metamaterial technique may be more satisfying considering all aspects. Along with, we can consider SAR affecting parameters and make optimization for better response.

Numerical Analysis of Specific Absorption Rate and Heat Transfer in Human Head Subjected to Mobile Phone Radiation: Effects of User Age and Radiated Power

2012 ◽  
Vol 134 (12) ◽  
Author(s):  
Teerapot Wessapan ◽  
Phadungsak Rattanadecho
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Human Head ◽  
Head Model ◽  
Specific Absorption ◽  
Radiated Power ◽  
Mobile Phone Radiation

The human head is one of the most sensitive parts of the human entire body when exposed to electromagnetic radiation. This electromagnetic radiation interacts with the human head and may lead to detrimental effects on human health. However, the resulting thermophysiologic response of the human head is not well understood. In order to gain insight into the phenomena occurring within the human head with temperature distribution induced by electromagnetic field, a detailed knowledge of absorbed power distribution as well as temperature distribution is necessary. This study presents a numerical analysis of specific absorption rate and heat transfer in the heterogeneous human head model exposed to mobile phone radiation. In the heterogeneous human head model, the effects of user age and radiated power on distributions of specific absorption rate and temperature profile within the human head are systematically investigated. This study focuses attention on organs in the human head in order to investigate the effects of mobile phone radiation on the human head. The specific absorption rate and the temperature distribution obtained by numerical solution of electromagnetic wave propagation and unsteady bioheat transfer equation in various tissues in the human head during exposure to mobile phone radiation are presented.

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