Comparison of specific absorption rate (SAR) induced in child-sized and adult heads using a dual band mobile phone

2004 ◽  
Author(s):  
A. Hadjem ◽  
D. Lautru ◽  
C. Dale ◽  
Man Fai Wong ◽  
V.F. Hanna ◽  
...  
Keyword(s):  
Mobile Phone ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Dual Band ◽  
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.

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