Numerical Analysis of Specific Absorption Rate and Temperature Distribution in Human Eye due to Moving Electromagnetic Source

Deepshikha Bhargava

Phadungsak RattanadechoEmail

Department of Mechanical Engineering, Faculty of Engineering, Thammasat University (Rangsit Campus), 99 moo 18, Klong Luang, Pathum Thani 12120, Thailand. 

Abstract

The study presents a numerical analysis of the absorption of electromagnetic (EM) radiation in human eye due to moving EM source. A two-dimensional eye model consisting of six types of tissues is exposed to a moving EM source operating at 900 and 1800 MHz frequencies for a time period of 10 minutes. Electric field intensity, specific absorption rate (SAR), and temperature distribution in the eye for both the frequencies have been calculated by solving a coupled model of electromagnetic wave and bio-heat transfer module. From the results it is concluded that the EM source’s position, and the dielectric and thermal properties of the eye highly influence the absorption of EM radiation in the eye layers. SAR and temperature in the eye do not seem to correlate with each other. Effect of the size of the EM source on the EM absorption in the eye layers has also been investigated. The resultant SAR values in some cases exceeded the limited value whereas the temperature increase is found to be below the safety levels. 


Numerical Analysis of Specific Absorption Rate and Temperature Distribution in Human Eye due to Moving Electromagnetic Source