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首页> 外文期刊>Journal of Emerging Technologies in Web Intelligence >Effects of Substrate Material and Dielectric Properties on Electromagnetic Energy Absorption Over GSM Bands
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Effects of Substrate Material and Dielectric Properties on Electromagnetic Energy Absorption Over GSM Bands

机译：衬底材料和介电性能对GSM频段电磁能量吸收的影响

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—This paper analyzes the effects of electromagnetic (EM) absorption towards human head with variations of human head dielectric properties. The human head exposed to 900, 1800 and 1900 MHz operational frequencies. Specific absorption rate (SAR) was the parameter used to measure the interactions of EM waves towards human head. The mobile phone attached with helical antenna together with human head simulated through finite-difference time-domain (FDTD) method using Computer Simulated Technology (CST) Microwave Studio. The human head dielectric properties were varied with increment and decrement of 10 % and 20 % of each of the properties. Through this study, it was found out that conductivity was directly proportional to SAR values while permittivity was inversely proportional with SAR values. In all frequency exposures, helical antenna with substrate of FR4 resulted in the highest SAR values. It was found that, helical antenna with substrate of Rogers RO3006 (loss free) had contributed the lowest SAR values in all operational frequencies exposed.
机译：—本文分析了人头电介质特性变化对人体的电磁（EM）吸收的影响。人体头部暴露于900、1800和1900 MHz的工作频率。比吸收率（SAR）是用于测量电磁波对人头的相互作用的参数。使用计算机模拟技术（CST）Microwave Studio通过有限差分时域（FDTD）方法模拟了带有螺旋天线和人体头部的手机。人头的介电特性随每种特性的10％和20％的增减而变化。通过这项研究，发现电导率与SAR值成正比，而介电常数与SAR值成反比。在所有频率暴露中，带有FR4衬底的螺旋天线产生的SAR值最高。结果发现，在所有暴露的工作频率中，带有Rogers RO3006（无损）衬底的螺旋天线贡献了最低的SAR值。

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