Analyzing the SAR in Human Head Tissues under Different Exposure Scenarios

Abstract

Overview

This paper explores the specific absorption rate (SAR) in human models under varying exposure scenarios. It combines laboratory measurements with simulations to offer comprehensive insights into electromagnetic field effects on human tissues.

Findings

• Measurement Techniques: Initial SAR values were obtained using a standardized SAR laboratory and phantom models for RF-EMF sources at frequencies 900 MHz and 1800 MHz. A computer simulation technology (CST) program was later utilized for meticulous SAR calculation.
• SAR Evaluation: Simulations with CST assessed average SAR values for the head, brain, muscles, and fat. The study also considered variables like gender, age, and tissue type using realistic computational human models.
• Impact of Frequency: Notably, SAR values at 1800 MHz were significantly higher than at 900 MHz across all models, with variations detailed for different demographics such as babies, children, and adults.
• Health Implications: Despite electromagnetic field levels being below general public reference levels, some localized SAR values surpassed the safe limits set by the International Commission of Non-Ionizing Radiation Protection, particularly at 1800 MHz.

Conclusion

The findings underscore the importance of considering SAR metrics in the assessment of wireless technology safety, enhancing public health standards, and guiding technological and regulatory decisions.