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

Authors: Makhmanazarov R, Tseplyaev I, Shipilov S, Krivova N

Year: 2024

Category: Biophysics

Journal: Applied Sciences

DOI: 10.3390/app14010208

URL: https://www.mdpi.com/2076-3417/14/1/208

Abstract

Overview

This study addresses the need to understand physiological reactions in the brain and skin of higher mammals chronically exposed to radiofrequency radiation. Specifically, it focuses on estimating the specific absorption ratio (SAR) in rats using innovative methodologies.

Methodology

The research involved developing a laboratory setup simulating a 5G New Radio (NR) base station operation characterized by a 15 MHz signal bandwidth and a 2.4 GHz carrier frequency. A modified method for theoretical SAR estimation was introduced, emphasizing one-sided irradiation and distributed absorption.

  • Utilization of the CST Microwave Studio simulation software (2020) to model SAR values.
  • Employment of dielectric parameters from the software's library.
  • Application of the IEEE/IEC 62704-1 algorithm for detailed investigations in numerical simulations.

Findings

The paper presents comparative analyses between theoretical estimates and results obtained from numerical simulations using primitive rat models. The observed discrepancies in SAR distributions were 7% and 10% for distributed and non-distributed absorptions, respectively. These results underscore the efficacy of the proposed method under conditions of decreasing power flux density.

Conclusion

The modified method presented provides a viable approach to approximate whole-body SAR during chronic exposure to electromagnetic fields in rats, promising significant implications for safety protocols relating to 5G technology deployments.

5G NR SAR rats chronic exposure radiofrequency radiation electromagnetic fields numerical simulation
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