Abstract
— The objective of the present study is to evaluate the Specific Absorption Rate (SAR) within the human head model exposed to the radiation of planar monopole antenna with T-shaped coupling feed and an inductive shorting strip. The presented design has a compact structure, a planar configuration and occupying a small size of 36×20mm 2 . Two wide bands can be generated by the proposed antenna 546 MHz (734-1280 MHz) and 1066 MHz (1934-3000 MHz) for the LTE/WWAN/WLAN internal mobile phone. The antenna performance parameters comprising return loss, radiation patterns, and gain are discussed. In this research work four different human head models have been implemented: homogenous spherical head, spherical seven layer model, Specific Anthropomorphic Mannequin (SAM) phantom and HUGO human head model. On the other hand the effects of operating frequency and gap distance between the mobile phone antenna and the human head model on distributions of the SAR inside the human head are investigated. All the simulations are done for three different distances between the antenna and the head model (5 mm, 10 mm and 20 mm). Moreover, the SAR levels for the head tissues are calculated in accordance to the two currently accepted standards: Federal Communications Commission (FCC) and International Commission on Non-Ionizing Radiation Protection (ICNIRP).
Highlights
The antennas used for mobile telephony have experienced well recess of transformations to adapt to the needs of the market
The aim of this work is to examine the effects of electromagnetic radiation measured in terms of specific absorption rate (SAR) in a human head exposed to the radiation of a planar monopole antenna with a coupling feed and an inductive shorting strip for LTE/WWAN/WLAN internal mobile phone
The dielectric properties of the seven-layer human head model used in the simulations are listed in Table II [24].The third model is a Specific Anthropomorphic Mannequin (SAM) phantom head provided by CST MWS, which is composed of two layers namely shell and fluid Fig.11(f)
Summary
The antennas used for mobile telephony have experienced well recess of transformations to adapt to the needs of the market. The aim of this work is to examine the effects of electromagnetic radiation measured in terms of specific absorption rate (SAR) in a human head exposed to the radiation of a planar monopole antenna with a coupling feed and an inductive shorting strip for LTE/WWAN/WLAN internal mobile phone. Fig. plots the simulated return loss for the proposed antenna as a function of the length L varied from 70 to 100 mm Large effects on both the antenna’s lower and upper bands are seen. The dielectric properties of the seven-layer human head model used in the simulations are listed in Table II [24].The third model is a Specific Anthropomorphic Mannequin (SAM) phantom head provided by CST MWS, which is composed of two layers namely shell and fluid Fig.11(f).
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