Design and analysis of a metamaterial shielding chip for mobile phones to reduce EM radiation in Human Head

Abstract

This study focuses on the development and evaluation of a shielding chip made from metamaterials, designed to decrease the absorption of electromagnetic (EM) radiation by the human head from mobile phones. As public concern rises regarding long-term exposure to radiofrequency (RF) emissions, effective personal protection technologies are increasingly important. The proposed shield uses a custom-engineered metamaterial pattern to absorb and deflect EM waves, which lowers the Specific Absorption Rate (SAR) in cranial tissues. Simulations using the Finite Element Method (FEM) were performed across various 5G frequencies. These simulations utilized a detailed, multi-layered anatomical model of the head, including skin, fat, bone, dura, cerebrospinal fluid (CSF), and brain tissues. The analysis assessed critical metrics under realistic conditions, including SAR distribution, electric field attenuation, penetration depth, reflection coefficient (S11), and induced temperature changes. The findings show that the metamaterial chip substantially reduces SAR levels, especially in tissues with high water content. Both the 1-gram and 10-gram averaged SAR results stayed under the 1.6 W/kg regulatory limit set by the Federal Communications Commission (FCC). The shield exhibited strong wave-absorbing properties, with a notable performance at 2.4 GHz characterized by low reflection and no substantial thermal increase in head tissues. The research concludes that the metamaterial-based shielding chip presents a practical and effective approach for mitigating EM radiation exposure from mobile phone usage.