On the general energy-absorption mechanism in the human tissue

✍ Scribed by Outi Kivekäs; Tuukka Lehtiniemi; Pertti Vainikainen

• Book ID: 102948337
• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 750 KB
• Volume: 43
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20418

✦ Synopsis

Abstract

In this paper, the general energy‐absorption mechanism in human tissue is investigated. The purpose is to increase the understanding of this process, which is important, for example, when designing mobile handset antennas with minimized user interaction. The behavior of the electric fields of small antennas located near a lossy dielectric half‐space, which consists of several material layers, is studied by numerical simulations. Two different RF sources operating at 900 MHz are used: a half‐wave dipole and a patch antenna on a mobile handset chassis. The results show that the peak specific absorption rate (SAR) is not actually related to the antenna current, as has been commonly believed. Instead, the location of the SAR maximums can be explained by inspecting the boundary conditions of the quasi‐static electric near‐fields of the antenna at the air‐tissue interface. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 195–201, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20418