Electromagnetic Exposure Dosimetry Study on Two Free Rats at 1.8 GHz via Numerical Simulation

Abstract

Overview

The research primarily assesses the impact of electromagnetic fields on health through an animal model study. Specifically, the study focuses on the biological effects of radio frequency (RF) electromagnetic exposure on rats.

Findings

• The study used infrared thermography to monitor the activity of two free rats in a cage within a microwave darkroom over 48 hours.
• A key focus was on the variation of Specific Absorption Rate (SAR) caused by the proximity of another rat.
• Three parameters influenced the average whole-body SAR (WB-avgSAR): relative distance (d), direction angle (α), and orientation angle (β).
• Numerical simulations using XFdtd 7.3 software were employed to explore these effects.
• The resulting data revealed that the relative posture and position of the two rats affected their WB-avgSAR, causing fluctuations in different positions.
• A key finding was that the variation rate of the 48-hour average WB-avgSAR was only 10.3%, suggesting that the WB-avgSAR of a single free rat can approximately represent that of multiple rats.

Conclusion

While the study indicates low variation in SAR over time, suggesting minimal risk in controlled conditions, the inherent complexities of electromagnetic field exposure on biological systems underscore the need for precisely controlled dosimetric studies to fully understand health implications.