Design and SAR Reduction of the Vest Antenna using Metamaterial for Broadband Applications
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Design and SAR Reduction of the Vest Antenna using Metamaterial for Broadband Applications摘要
One of the most important obstacles that portable antennas are facing is their harmful effect on the user’s body. In this paper, besides proposing a UWB vest antenna with a bandwidth of at least 500MHz, we try to reduce the specific absorption ratio (SAR) due to the proposed antenna on the human body. In order to achieve the mentioned goal, we modeled the human body after designing the antenna. In order to have simulation results closer to reality, we have used a 3-layer model of the human body instead of the 1- layer model. In our model of the human body, all of the body parts, except the torso, are modeled with three layers of bone, fat, and muscle. Since the torso has a different structure from other body parts and is close to the place of the antenna feed, we modeled it using four layers of air, bone, fat and muscle. As the next step in our simulation process, the antenna was installed on the human body and then the antenna parameters and its SAR were obtained again. In the last stage, SAR due to the proposed antenna is reduced using metamaterial
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