Effects of a brain tumor in a human head on SAR and temperature rise due to RF sources at 4G and 5G frequencies

Abstract

Overview

This paper investigates the effects of a brain tumor in a dispersive human head model on the specific absorption rate (SAR) and temperature rise distributions due to different types of RF sources at 4G and 5G cellular frequencies. A comprehensive multiphysics model is employed to analyze these effects.

Methodology

• A multiphysics model is used to analyze the SAR and temperature rise in a dispersive human head with a brain tumor.
• The model incorporates both near-field exposure from an adjacent antenna and far-field exposure from base station radiations at 4G and 5G frequencies.
• Simulations are realized at frequencies of 2.1 and 3.6 GHz.

Findings

The presence of the brain tumor slightly alters SAR and temperature rises. Notably, the areas around the brain tumor exhibited higher SAR1g values and temperature rise compared to healthy tissue, highlighting diverse electromagnetic and thermal properties in tumor-affected zones.

Conclusion

The study confirms that brain tumors can influence the distribution of SAR and temperature rise due to RF exposure at cellular frequencies. Both the frequency and the type of RF source play significant roles in this modulation. Continuous research is essential to understand the full impact of such changes, especially with the global escalation towards 5G technology.