Differences in RF energy absorption in the heads of adults and children

Abstract-This paper presents electromagnetic energy absorption in the homogeneous and layered human body models due to body-worn UWB antennas, at frequencies of 3, 6 and 8 GHz. Typical small planar UWB antennas are used in this study: printed UWB disc monopole and UWB slot antenna. Distances of 2, 5 and 10 mm (reactive near-field region) between antennas and human body were chosen, approximating realistic scenarios of operation in Wireless Body Area Networks. To approximate different parts of the human body, or body variations among different users, we compare results obtained for the planar homogeneous (muscle) model with those for three-layer body models (skin, fat and muscle), with different thicknesses of the skin (0.5-2 mm) and fat (1-9 mm) tissue. For these body models we investigate the electromagnetic energy absorption mechanism by examining the peak 1-g SAR and peak SAR (without mass averaging). Based on our results we present and discuss new finding concerning the general electromagnetic energy absorption mechanism in human tissues under reactive near-fields exposure conditions.

show abstract

“…In a case of mobile phones, of the main concern was the interaction between terminal antennas and a human head [8,9].…”

Section: Introductionmentioning

confidence: 99%

Em Energy Absorption in the Human Body Tissues Due to Uwb Antennas

Klemm¹,

Troester²

2006

PIER

110

View full text Add to dashboard Cite

show abstract

“…The first study dealt with electric fields. Various reports were presented on the reduction of pineal melatonin and N-acetyl transferee (NAT) and synthesis of melatonin enzyme, when exposed to electric fields for about for one month 22 hours a day [1][2][3][4][5][6][7]. Other studies did not find any biological effects because of exposure to electromagnetic field [8].…”

Section: Literature Reviewmentioning

confidence: 99%

“…The magnetic field is related to the current that flows through the electric wire. The magnetic field intensity is commonly expressed in microtesla (μT) [3].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Health Risks Resulting from Extending the 400kV High Voltage Transmission Lines on the Human

Dervish¹

2017

Tikrit j. eng. sci.

View full text Add to dashboard Cite

Although it is difficult to imagine life without electricity, there are compiling confirmations show that exposure to magnetic fields correlated electricity and radio frequencies pose magnificent hazards to human health. The most economist method to transfer electricity from power generation stations to users is by measures of high power transmission lines, buoyed by big transmission towers. The cables laced between the towers radiate magnetic and electric fields. In this research study, the magnetic field at ground level under 400 kV network lines extended in residential places have been conducted in two ways, mathematical calculation and practical measurement then the obtained results analyzed and compared with the international standards reference values. the reason of chose this type of transmission line is frequently using. The results indicate that they fall within the safe limiter commended by the World Health Organization. the strength of radiation increasing with high of sea level and moisture ratio because of air ionization Keywords: High voltage transmission lines, magnetic field, negative health effect.

show abstract

“…This is not supported by scientific facts. From the exposure point of view, carefully conducted theoretical dosimetry studies have shown that there is no evidence for a correlation between energy absorption and head size [16,17]. Other factors such as shape of the head, tissue distribution and antenna position are more important factors affecting specific absorption rate (SAR).…”

Section: Rf Energy and Central Nervous Systemmentioning

confidence: 99%

Recent Advances in Bioelectromagnetics Research on Mobile Telephony and Health - An Introduction

Lang¹

2006

PIERS Online

View full text Add to dashboard Cite

Abstract-It is not widely known that biological and health effects of radiofrequency (RF) energy have been studied for about 50 years. Currently, there are about 1500 published studies related to RF health research, covering various disciplines from biophysics to epidemiology, usually defined as bioelectromagnetics research. All these studies can be found at WHO EMF database (http://www.who.int/peh-emf/en/). Current international EMF safety guidelines, established by the International Commission on Nonionizing Radiation Protection (ICNIRP) and IEEE, are based on this extensive research database.Recent advances in multidisciplinary bioelectromagnetics research addressing mobile telephony and health issue have significantly increased our knowledge about fundamental scientific questions in this area. Improved dosimetry and exposure design have made it possible to conduct well-controlled biomedical experiments. Several carefully conducted theoretical biophysical analyses have also increased our understanding about the responses of cell macromolecules to RF energy. However, inconsistent molecular biological findings have raised questions whether the observed changes are real and whether they have any significance on human health. In this regard, part of the biomedical research community has forgotten a fundamental rule that an observed effect cannot be considered established if it has not been independently replicated and confirmed by other researchers. RF energy-cancer link has been rejected by recent carefully conducted animal studies. However, inconsistent epidemiological findings and misinterpretation of epidemiological data continue to create confusion in mobile telephony-cancer debate in many countries. Studies on other health endpoints than cancer have not either been able to confirm any adverse health effects in humans, such as effects on central nervous system (CNS) at low RF exposure levels. The weight of scientific evidence shows that RF energy does not cause adverse health effects in humans below the internationally accepted RF exposure guidelines, such as established by ICNIRP and IEEE.

show abstract

Differences in RF energy absorption in the heads of adults and children

Cited by 70 publications

References 52 publications

Em Energy Absorption in the Human Body Tissues Due to Uwb Antennas

Em Energy Absorption in the Human Body Tissues Due to Uwb Antennas

Analyzing the Health Risks Resulting from Extending the 400kV High Voltage Transmission Lines on the Human

Recent Advances in Bioelectromagnetics Research on Mobile Telephony and Health - An Introduction

Contact Info

Product

Resources

About