REDUCTION OF SPECIFIC ABSORPTION RATE (SAR) IN THE HUMAN HEAD WITH FERRITE MATERIAL AND METAMATERIAL

The electromagnetic interface between the antenna and the human head is reduced with ferrite materials and metamaterials. The reduction of Speciflc Absorption Rate (SAR) with materials and metamaterials is performed by the flnite-difierence time-domain method with Lossy-Drude model by CST Microwave Studio. The metamaterials can be achieved by arranging split ring resonators (SRRs) periodically. The SAR value has been observed by varying the distances between head model to phone model, difierent widths, difierent thicknesses, and difierent heights of materials and metamaterial design. Materials have achieved 47.68% reduction of the initial SAR value while metamaterials achieved a reduction of 42.12%. These results can endow with supportive information in designing the wireless communications equipments for safety compliance.