Enhancing antenna performance and SAR reduction by a conductive composite loaded with carbon-silica hybrid filler

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• 作者：Ahmed A. Al-Ghamdi^a ; ^{aghamdi90@hotmail.com}Author Vitae ; Omar A. Al-Hartomy^a ; ^{oalhartomy@hotmail.com}Author Vitae ; Falleh R. Al-Solamy^b ; ^{falleh@hotmail.com}Author Vitae ; Nikolay T. Dishovsky^c ; ^{dishov@uctm.edu}Author Vitae ; Nikolay T. Atanasov^d ; ^e ; ^{natanasov@windowslive.com} ; ^{natanasov@swu.bg}Author Vitae ; Gabriela L . Atanasova^d ; ^e ; ^{gatanasova@windowslive.com}Author Vitae
• 关键词：Antenna performance ; Conductive composite ; Radiation efficiency ; Specific absorption rate
• 刊名：AEU - International Journal of Electronics and Communications
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：72
• 期：Complete
• 页码：184-191
• 全文大小：1666 K
• 卷排序：72

文摘

In this paper, we describe a technique for reducing the specific absorption rate (SAR) and human effects on antenna performance, based on combined use of rubber conductive composite loaded with carbon-silica hybrid filler used like a single director and a resonant half wave dipole. The finite-difference time-domain method was used to evaluate SAR and antenna performance for different antenna-composite configurations and distances. Bandwidth, gain, and radiation efficiency for different antenna-composite configurations were compared. It was found that the presence of a conductive composite loaded with carbon-silica hybrid filler can effectively reduce maximum SAR value (up to 70%) in a human head model, increasing the radiation efficiency (up to 67%) and the bandwidth (up to 110%) of the antenna.