Radiation analysis in human brain and skull exposed at 915 MHz, 1900 MHz and 2450 MHz frequencies and radiation minimization methods

In India, cell phone use is increasing day by day with very high growth of 50 million in 2005 to approximately 530 million now and the number is increasing more. When the mobile phone comes in close proximity to the human body then it is quite harmful due to the fact that it emits electromagnetic radiation. Now, 4G is in existence and it offers a huge variety of features. The dependence on mobile phones increases with 4G which is an alarming factor because continuous slow radiation is affecting the health. When RF products came into public use, there was a requirement for fixing emission standards. These standards were set by ICNIRP, FCC, IEEE, etc. regulating committees. The harmful radiation is described in terms of the successive approximation rate (SAR). The SAR limit is specified as 1.6 Watts/kilogram for part of the body(head exposure) and 0.08 Watts/kilogram for the whole body. In this paper, the SAR measurement is observed up to 5 mm inside the brain and skull at different distances between the human brain/skull vs mobile phone through a wide variety of radiation prone devices. The objective of the paper is to investigate the thermal radiation of the electromagnetic waves inside the human head through statistical calculations. The close distance up to which SAR may be harmful to the human brain has been tried to found out so that a safe distance could be predicted. Paper also investigates possible methods to minimize mobile phone radiation on exposed tissues.