Polarization and human body effects on the microwave absorption in a human head exposed to radiation from handheld devices

A multigrid finite-difference time-domain code was used to calculate specific absorption rate (SAR) distribution in a human head exposed to microwave radiation from handheld antennas. The effect of the human body was taken into account and different antennas and polarization conditions were consider...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2000-11, Vol.48 (11), p.1979-1987
Hauptverfasser: Iskander, M.E., Zhengqing Yun, Quintero-Illera, R.
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container_end_page 1987
container_issue 11
container_start_page 1979
container_title IEEE transactions on microwave theory and techniques
container_volume 48
creator Iskander, M.E.
Zhengqing Yun
Quintero-Illera, R.
description A multigrid finite-difference time-domain code was used to calculate specific absorption rate (SAR) distribution in a human head exposed to microwave radiation from handheld antennas. The effect of the human body was taken into account and different antennas and polarization conditions were considered, The distance between the antenna and human head were varied to examine the effect of the human body on the SAR distribution, From the numerical results, it is shown that the human body plays a significant role on the SAR value and its distribution in the head [as high as 53% monopole, 41% planar inverted F antenna (PIFA)]. It is also shown that the effect of the body is more dominant at lower frequencies (monopole 900 MHz versus 1.9 GHz). For the monopole case, effect of body is particularly important at larger separation distances from the head, e.g., at d=4 cm versus d=0.5 cm. Effect of body is particularly important for the vertical orientation cases for both the monopole and PIFA.
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The effect of the human body was taken into account and different antennas and polarization conditions were considered, The distance between the antenna and human head were varied to examine the effect of the human body on the SAR distribution, From the numerical results, it is shown that the human body plays a significant role on the SAR value and its distribution in the head [as high as 53% monopole, 41% planar inverted F antenna (PIFA)]. It is also shown that the effect of the body is more dominant at lower frequencies (monopole 900 MHz versus 1.9 GHz). For the monopole case, effect of body is particularly important at larger separation distances from the head, e.g., at d=4 cm versus d=0.5 cm. 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The effect of the human body was taken into account and different antennas and polarization conditions were considered, The distance between the antenna and human head were varied to examine the effect of the human body on the SAR distribution, From the numerical results, it is shown that the human body plays a significant role on the SAR value and its distribution in the head [as high as 53% monopole, 41% planar inverted F antenna (PIFA)]. It is also shown that the effect of the body is more dominant at lower frequencies (monopole 900 MHz versus 1.9 GHz). For the monopole case, effect of body is particularly important at larger separation distances from the head, e.g., at d=4 cm versus d=0.5 cm. Effect of body is particularly important for the vertical orientation cases for both the monopole and PIFA.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/22.884186</doi><tpages>9</tpages></addata></record>
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subjects Antennas
Electromagnetic wave absorption
Finite difference methods
Frequency
Handheld computers
Human
Human body
Humans
Mathematical analysis
Microwave antennas
Microwave devices
Microwaves
Monopoles
Polarization
Specific absorption rate
Studies
Synthetic aperture radar
Time domain analysis
title Polarization and human body effects on the microwave absorption in a human head exposed to radiation from handheld devices
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