Analisis Pengurangan Kadar Penyerapan Spesifik dalam Kepala Manusia Menggunakan Bahan Ferit dan Metabahan

This paper discusses the method to reduce electromagnetic wave interaction with the human head using ferrite and metamaterials. The measurement of Specific Absorption Rate (SAR) reduction with ferrite materials and metamaterials was performed using the finite-difference time-domain (FDTD) method with Lossy-Drude model via CST Microwave Studio software. The metamaterials was formed from a periodic arrangement of the split ring resonators (SRRs). The SAR values were measured at several distances between the head model and the phone, widths, thicknesses, and heights of the ferrite and metamaterial. The research results indicated that the SAR1g value has been reduced to a value of 1.043 W/kg using ferrite material and 1.161 W/kg using metamaterials. For SAR10g, the value decreases to 0.676 W/kg using ferrite material and 0.737 W/kg using metamaterials. Numerical results of the SAR values in a human head with the presence of SRRs as metamaterials are shown to validate the effect of SAR reduction. These results can provide useful information in the design of the wireless communication equipment for safety compliance.