Comparative Study of SAR from Mobile Phones With and Without Headset

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Abstract— Mobile phone have become the most commonly used electronic gadget. A world without mobile phone is now almost unimaginable. The radiofrequency signals produced by mobile phones are transferred as electromagnetic radiation (EMR). EMR has the ability to penetrate through semi solid substances especially human body's tissues and caused dielectric heating. This effect can be classified as thermal and non thermal radiation. The skin near ear skull region is very thin compare to other part of human body. When using mobile phone for a longer period of time, this area absorbs EMR easily that can affects human immune systems. This paper is mainly focused on the study about signal absorption rate under various circumstances. Already there are various methods to measure this radiation rate, but International standard is not yet available. Here I measured the radiation power from the mobile phone and study has been done under various situations. Further work is being done on the measurement of SAR when mobile phones are used with headset and without headset. Index Terms— Radiation, Base station, SAR, Antenna, Radiated Power, Conical Log Spiral Antenna I. INTRODUCTION Cell phone technology has revolutionized the telecommunication scenario in India. Due to its several advantages, cell phone technology has grown exponentially in the last decade. Currently, there are more than 50 crore cell phone users and nearly 4.4 lakh cell phone towers to meet the communication demand. The numbers of cell phones and cell towers are increasing without giving due respect to its disadvantages. Because of this, scientists worldwide are concerned about the potential health risks associated with the use of mobile phones. As we all know, the radia... ... middle of paper ... ...d as IEEEC95.1-1991). Copyright1992 by the Institute of Electrical and Electronics Engineers, Inc.(IEEE), NewYork, N.Y.10017. [3] Balzano,Q., GarayO. And Manning,T.J. " Electromagnetic energy exposure of simulated users of portable cellular telephones," IEEE Transactions on Vehicular Technology, Vol.44 (3), pp.390-403(1995). [4] Chou,C.K.etal.," Radio frequency Electromagnetic Exposure: Tutorial Review on Experimental Dosimetry." Bioelectromagnetics, 17:195- 208 (1996). [5] Foster, K.R., and A.W.Guy, "The Microwave Problem," Scientific American, 255(3):32 (September1986). [6] Gandhi, O.P., G.Lazzi and C.M.Furse, " EM Absorption in the Human Head and Neck for Mobile Telephones at 835 and 1900MHz," IEEE Trans.on Microwave Theory and Techniques ,44(10), pp.1884-1897 (1996). [7] Girish Kumar, “ Cell Tower Radiation”, Report submitted to DOT, Delhi (December 2010)

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