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2010-12-24
A New Low SAR Antenna Structure for Wireless Handset Applications
By
Progress In Electromagnetics Research, Vol. 112, 23-40, 2011
Abstract
This paper proposes a new mobile handset antenna structure to reduce the value of the specific absorption rate (SAR). The antenna is based on the PIFA structure and operates at dual-bands of 0.9 GHz and 1.8 GHz. The chassis current is reduced using a metallic shim-layer inserted between the patch and chassis. This shim-layer is connected to the handset chassis through posts whose number and positions are determined using optimization techniques. Sidewalls are attached to increase the gain of the antenna and reduce the radiation towards human head. Simulations in the cheek mode show that the SAR reduction factor (SRF) of the proposed structure averaged over 10-g is more than 75% at 0.9 GHz and 46% at 1.8 GHz. The SRF values obtained using simulations and measurements are found to be better than 51% and 76% at 0.9 GHz and 1.8 GHz, respectively.
Citation
Andi Hakim Kusuma, Abdel-Fattah Sheta, Ibrahim Elshafiey, Zeeshan Siddiqui, Majeed Alkanhal, Saeed Aldosari, Saleh A. Alshebeili, and Samir Mahmoud, "A New Low SAR Antenna Structure for Wireless Handset Applications," Progress In Electromagnetics Research, Vol. 112, 23-40, 2011.
doi:10.2528/PIER10101802
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