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This paper presents a study of the absorption of electromagnetic waves in the human head while using a mobile phone. This absorption is presented in the form of thermal effects of exposure to radiofrequency electromagnetic fields for long period or in the form of non-thermal effect for short period exposure. The authors, therefore, present the levels of absorption of electromagnetic waves in the human head executed by patch antenna, using the heat equation, the Specific Absorption Rate (SAR) and the increase in temperature.
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