Abstract
Textile diamond dipole and Artificial Magnetic Conductor (AMC) have been proposed and tested under wearable and body centric measurements. The proposed antenna and AMC sheet are entirely made of textiles for both the substrate and conducting parts, thus making it suitable for wearable communications. Directive radiation patterns with high gain are obtained with the proposed AMC sheet, hence minimizing the radiation towards the human body. In this study, wearable and body centric measurements are investigated which include bending, wetness and Specific Absorption Rate (SAR). Bending is found not to give significant effect to the antenna and AMC performance, as opposed to wetness that yields severe performance distortion. However, the original performance is retrieved once the antenna and AMC dried. Moreover, notable SAR reduction is achieved with the introduction of the AMC sheet, which is appropriate to reduce the radiation that penetrates into human flesh.
Highlights
Wearable antennas experience performance degradation such as frequency detuning, bandwidth reduction and radiation distortions when placed on human body [1]
This study explored the development of textile diamond dipole with Artificial Magnetic Conductor (AMC) sheet
It is shown that bending does not give significant impact to the S-parameter, radiation pattern and gain performances
Summary
Wearable antennas experience performance degradation such as frequency detuning, bandwidth reduction and radiation distortions when placed on human body [1]. The radiation that penetrates into the human cells is a major health concern [2] To overcome such issues, textile AMC sheet has been introduced which is flexible and suitable for wearable communications [3]. Wearable antennas that are mounted on human body are subjected to dynamic environment changes such as movements and exposure to nature, e.g. rain and snow. Such environment variation is a challenge for textile antennas to function effectively [1]. As mentioned earlier, wearable antennas that are placed very close to human body create health concerns regarding the penetration of electromagnetic radiation onto the human’s flesh [9]. SAR investigation will be presented at the end of this article
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