Reduction of SAR in a human-head model wrapped in clothing materials

✍ Scribed by Hsing-Yi Chen; Kun-Yi Shen

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 872 KB
• Volume: 37
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.10902

✦ Synopsis

Abstract

An analysis of clothing material for reducing RF energy absorption in a human‐head model has been studied using the finite‐difference time‐domain (FDTD) method. The local maximum specific absorption ratio (SAR) induced in the human head model is used for the evaluation of the clothing material's shielding effectiveness for EM exposure. It is found that clothing material with a dielectric constant close to that of human skin will induce higher RF energy absorption in the human‐head model. On the other hand, clothing material with a higher relative dielectric constant and permeability can greatly reduce RF energy absorption. If the clothing material is mixed with conducting materials or magnetic materials, a remarkable reduction of RF energy absorption in the human‐head model will be obtained. These preliminary results provide valuable knowledge to help in the manufacture of anti‐electromagnetic wave clothing. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 305–308, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10902