Estimation of SAR Average in Rats during 5G NR Chronic Exposure

Abstract

Overview

This study explores the physiological responses of higher mammals' brain and skin when exposed to chronic radiofrequency radiation by determining the specific absorption ratio (SAR). It encompasses the development of a lab setup to imitate the operations of a 5G New Radio base station.

Methods

• The paper introduces a modified method for theoretical SAR estimation in one-sided irradiation and absorption scenarios.
• Utilizes CST Microwave Studio simulation software for numerical modeling in primitive rat models.
• Compares theoretical estimates with numerical simulations for SAR distributions, noting discrepancies.

Findings

Numerical calculations of SAR align qualitatively with theoretical estimates despite using rough rat phantom approximations in simulations. The acceptable variance in these estimates was highlighted, showing a discrepancy of 7-10% between methods.

• Whole-body average SAR values recorded were 0.0431, 0.0076, and 0.0059 W/kg for three different rat groups.
• Ambient conditions complicate accurate dosimetry, with multiple factors like ambient illumination and reflections affecting measurements.

Conclusion

The study concludes that while the waveguide method may offer the most accurate SAR measurement, it's unsuitable for long-term experiments. Adjustments should factor in animal mobility and other experimental conditions. Notably, SAR exposure levels potentially linked to temperature rises in animals underline critical health risks associated with prolonged EMF exposure.