Abstract
This paper presents the investigation influence of the common metallic loop like accessory on Specific Absorption Rate (SAR) averaged over 10g and 1 g tissue.The simulations were made by means CST Microwave Studio software at frequencies 2.45GHz and 2.6GHz. Numerical analysis conducted using broadband textile monopole antenna (TM) with variations of orientation and distance showed that the SAR value increased when the antenna horizontally polarized.This is up to 80% more than vertically polarized TM placed closest item to 2mm.
Highlights
The growing usage of mobile phones and electronic devices has raised public concerns about the possible health effects of electromagnetic (EM) radiation of these devices on user [1]
It can been clearly seen that the S11 variation depends on the distance of the antenna from the metallic loop like accessory .The worst case of S11 is observed when textile monopole antenna (TM) is horizontal polarization, which is parallel to the human body model with the distance to the metallic item, i.e, 8 mm and 12 mm
The results presented in this paper are solely based on computer simulation using commercially software CST Microwave Studio
Summary
The growing usage of mobile phones and electronic devices has raised public concerns about the possible health effects of electromagnetic (EM) radiation of these devices on user [1]. A more recent study [4] found that the values of the SAR on the existence of antenna ground plane besides antenna-to-phantom is seen to be quite linearly decrease with increasing distances. It was hypothesized that the presence of metallic body accessories may affect the SAR values when the on-body wearable antenna was mounted in the close proximity to the human body. Numerous studies reported that significant changes in obtained SAR values were observed when placing the metallic implant within the tissue [1, 5,6,7]. It was reported that 1g SAR was increased by approximately 7.4 times from 0.50 to 3.70W/kg when circular metallic jewelry is placed in-between the phantom and the RF source [8]
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