SAR affected by shapes and electrical properties of the human head exposed to a cellular phone

Chen, Hsing‐Yi; Yang, Han-Peng

doi:10.1002/mop.20189

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…It is found that, the highest SAR value is obtained in the region of the skin near the handset. In addition, some other issues should be noted as well, as suggested by a comparison of the SARs induced in the realistic human-head model for the homogeneous and the inhomogeneous cases [30]. It is found that the constitutive parameters of a human head significantly affect the result of the SAR induced in homogeneous or inhomogeneous head models where the local maximum SAR induced in the homogeneous human-head model is larger than that induced in the inhomogeneous human head model.…”

Section: Interaction Between Handset and Human Hand-headmentioning

confidence: 95%

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An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

Montaser¹,

Mahmoud²,

Elmikati³

2012

PIER B

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Abstract-In this paper, the interaction of a planar inverted-F antennas array, mounted on a mobile handset, with a human hand-head phantom is investigated in the 1.9 GHz band. The hybrid approach involving the particle swarm optimization (PSO) and Nelder-Mead (NM) algorithm is considered to optimize the complex excitations of the adaptive array elements in a mutual coupling environment for different beamforming synthesis. Firstly, the effect of the human handhead on the handset radiation characteristics is studied. Then, the spatial-peak specific absorption rate (SAR) values of 2-and 4-element PIFA arrays for mobile handset in the vicinity of a human handhead are evaluated numerically for different scenarios. The antenna is analyzed completely using finite difference time domain (FDTD) method while the interaction is performed using the CST Microwave Studio software.

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Section: Interaction Between Handset and Human Hand-headmentioning

confidence: 95%

“…A study of how the SAR is affected by different shapes and electrical properties of the human head exposed to a cellular phone have been reported [30]. The results showed that the shape of the human head plays a minor role in calculating the SAR induced in human head models.…”

Section: Introductionmentioning

confidence: 99%

An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

Montaser¹,

Mahmoud²,

Elmikati³

2012

PIER B

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“…The results obtained in Figure 6 indicate that, the resulting SAR values for the smart handset in different scenarios are under the limits set by IEEE C95.1: 2005 or ICNIRP standards. In addition, some other issues should be noted as well, as suggested by a comparison of the SARs induced in the realistic human-head model for the homogeneous and the inhomogeneous cases [24]. It is found that the constitutive parameters of a human head significantly affect the result of the SAR induced in homogeneous or inhomogeneous head models where the local maximum SAR induced in the homogeneous human-head model is larger than that induced in the inhomogeneous human head model.…”

Section: The Impact Of the Handset On Sarmentioning

confidence: 95%

“…A study of how the SAR is affected by different shapes and electrical properties of the human head exposed to a cellular phone has been reported [24]. The results showed that the shape of the human head plays a minor role in calculating the SAR induced in humanhead models.…”

Section: Introductionmentioning

confidence: 99%

Mobile communication systems

Parsons¹,

Gardiner²

2002

Choice Reviews Online

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In this paper we evaluate the potential of a 5-element monopole array incorporated into a handheld device for beamforming in the 5.0-GHz band. The geometry of the handset consists of a 5-element array: four elements located at the handset corners and the fifth-element located at the center. Also, the interaction of the antenna array, mounted on a mobile handset, with a human head phantom is investigated. Firstly, the spatial peak specific absorption rate (SAR) values of 5-element array antennas for mobile handsets in the vicinity of a spherical phantom of a human head are evaluated numerically as a function of the distance between the handset and the head phantom for two different scenarios. Next, the effect of the human head on the handset radiation pattern is studied. The effect of different handset positions on the radiation pattern is also considered. The particle swarm optimization (PSO) algorithm is used to optimize the complex excitations of the adaptive arrays elements in a mutual coupling environment for beamforming synthesis. All numerical simulations are performed using the FEKO Suite 5.3

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“…According to Chen and Yang (2004), the local SAR was lowered by approximately 40% when distance increased from 1 to 2 cm at 900 MHz and by about 60% at 1800 MHz. The size of reduction was the same with the homogeneous phantom.…”

Section: Sources Of Error In Epidemiological Studiesmentioning

confidence: 97%

Epidemiological risk assessment of mobile phones and cancer: where can we improve?

Auvinen¹,

Toivo²,

Tokola³

2006

European Journal of Cancer Prevention

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This paper aims to provide an overview of factors affecting the validity of epidemiological studies on health effects of mobile phone use. A qualitative review of published studies is presented, covering both risk assessment and exposure assessment. Considerable random error is likely to have occurred in studies carried out so far, primarily related to exposure assessment. Self-reported use of mobile phone appears to be imprecise. The relationship between the amount of mobile phone use and the radio-frequency field is unclear. Several factors affect the strength of the radio-frequency field emitted by the phone, and accommodating their effect has the potential to improve exposure assessment. The major opportunity to improve the quality of evidence is, however, through prospective studies. The major limitation of epidemiological studies addressing the health effects of mobile phone use is related to exposure assessment. These limitations are inherent in case-control studies. Quality of evidence can be improved by conducting prospective cohort studies.

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SAR affected by shapes and electrical properties of the human head exposed to a cellular phone

Abstract: ABSTRACT:The local maximum specific absorption rate (SAR)

Cited by 10 publications

References 9 publications

An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

Mobile communication systems

Epidemiological risk assessment of mobile phones and cancer: where can we improve?

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