Abstract

The specific absorption rate (SAR) induced by wireless radiofrequency (RF) systems depends on different parameters. Previously, SAR was mainly assessed under conditions of a single frequency and technology and for a limited number of localized RF sources. The current and emerging mobile systems involve a wider range of usage scenarios and are frequently used simultaneously, leading to combined exposures for which almost no exposure evaluation exists. The aim and novelty of this study is to close this gap of knowledge by developing new methods to rapidly evaluate the SAR induced by RF systems in such scenarios at frequencies from 50 MHz to 5.5 GHz. To this aim, analytical methods for SAR estimation in several usage scenarios were derived through a large-scale numerical study. These include subject-specific characteristics, properties of the RF systems and provide an estimation of the SAR in the whole body, tissues and organs, and different brain regions.

中文翻译：

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射频辐射综合评估远场，近场和近场区域中特定吸收率的评估

摘要

无线射频（RF）系统引起的比吸收率（SAR）取决于不同的参数。以前，SAR主要是在单一频率和技术条件下以及有限数量的本地RF源下进行评估的。当前和新兴的移动系统涉及更广泛的使用场景，并且经常同时使用，从而导致几乎没有暴露评估的组合暴露。这项研究的目的和新颖性是通过开发新的方法来快速评估RF系统在50 MHz至5.5 GHz频率下在这种情况下引起的SAR来弥合这一知识鸿沟。为此，通过大规模的数值研究得出了几种使用场景下的SAR估计分析方法。这些包括特定学科的特征，