Reduction of Specific Absorption Rate using carbon foam inside enclosures
Daniel Nareshkumar.M1, J.Janish Blessy2, Darwin Nesakumar A3, Sadagopal Venugopal4

1Daniel Nareshkumar.M*, Assistant Professor, Department of ECE, R.M.K. Engineering College. Gummidipoondi, Tamil Nadu, India.
2J.Janish Blessy, Assistant Professor, Department of ECE, Velammal Institute of Technology. Chennai, Tamil Nadu, India.
3Darwin Nesakumar A, Assistant Professor, Department Of ECE, R.M.K. Engineering College, Gummidipoondi, Tamil Nadu, India.
4Sadagopal Venugopal, Principal Engineer at Microchip Technology (India) Pvt Ltd, Chennai, India.
Manuscript received on December 16, 2019. | Revised Manuscript received on December 22, 2019. | Manuscript published on January 10, 2020. | PP: 1683-1688 | Volume-9 Issue-3, January 2020. | Retrieval Number: B6544129219/2020©BEIESP | DOI: 10.35940/ijitee.B6544.019320
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Abstract: 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. 
Keywords: SAR, PIFA, Carbon Foam, Enclosure
Scope of the Article:  Application specific ICs (ASICs)