Afridi Adeel, Ullah Sadiq, Khan Shahbaz, Ahmed Aziz, Khalil Akhtar Hussain, Tarar Munir Ahmad
J Microw Power Electromagn Energy. 2013;47(2):126-37. doi: 10.1080/08327823.2013.11689852.
This paper presents two types of dual band (2.4 and 5.8 GHz) wearable planar dipole antennas, one printed on a conventional substrate and the other on a two-dimensional metamaterial surface (Electromagnetic Bandgap (EBG) structure). The operation of both antennas is investigated and compared under different bending conditions (in E and H-planes) around human arm and leg of different radii. A dual band, Electromagnetic Band Gap (EBG) structure on a wearable substrate is used as a high impedance surface to control the Specific Absorption Rate (SAR) as well as to improve the antenna gain up to 4.45 dBi. The EBG inspired antenna has reduced the SAR effects on human body to a safe level (< 2W/Kg). I.e. the SAR is reduced by 83.3% for lower band and 92.8% for higher band as compared to the conventional antenna. The proposed antenna can be used for wearable applications with least health hazard to human body in Industrial, Scientific and Medical (ISM) band (2.4 GHz, 5.2 GHz) applications. The antennas on human body are simulated and analyzed in CST Microwave Studio (CST MWS).
本文介绍了两种双频（2.4GHz和5.8GHz）可穿戴平面偶极天线，一种印制在传统基板上，另一种印制在二维超材料表面（电磁带隙（EBG）结构）。研究并比较了这两种天线在不同弯曲条件下（在E面和H面）围绕不同半径的人体手臂和腿部时的工作情况。可穿戴基板上的双频电磁带隙（EBG）结构用作高阻抗表面，以控制比吸收率（SAR）并将天线增益提高到4.45dBi。受EBG启发的天线已将对人体的SAR影响降低到安全水平（<2W/Kg）。即，与传统天线相比，低频段的SAR降低了83.3%，高频段降低了92.8%。所提出的天线可用于工业、科学和医疗（ISM）频段（2.4GHz、5.2GHz）应用中对人体健康危害最小的可穿戴应用。人体上的天线在CST微波工作室（CST MWS）中进行了模拟和分析。
