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Wireless Electromagnetic Radiation Assessment Based on the Specific Absorption Rate (SAR): A Review Case Study

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TLDR
In this paper , the authors present a useful insight into the interaction of electromagnetic fields with biological media that is defined by the heat generation due to induced currents and dielectric loss, and summarise the most common techniques utilised between 1978 and 2021, in terms of the operational frequency spectrum, bandwidth, and SAR values.
Abstract
Employing electromagnetic fields (EMFs) in new wireless communication and sensing technologies has substantially increased the level of human exposure to EMF waves. This paper presents a useful insight into the interaction of electromagnetic fields with biological media that is defined by the heat generation due to induced currents and dielectric loss. The specific absorption rate (SAR) defines the heating amount in a biological medium that is irradiated by an electromagnetic field value. The paper reviews the radio frequency hazards due to the SAR based on various safety standards and organisations, including a detailed investigation of previously published work in terms of modelling and measurements. It also summarises the most common techniques utilised between 1978 and 2021, in terms of the operational frequency spectrum, bandwidth, and SAR values.

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Citations
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Journal ArticleDOI

Four-Element/Eight-Port MIMO Antenna System With Diversity and Desirable Radiation for Sub 6 GHz Modern 5G Smartphones

TL;DR: In this article , a multiple-input multiple-output (MIMO) antenna array system with identical compact antenna elements providing wide radiation and diversity function is introduced for sub 6 GHz fifth-generation (5G) cellular applications.
Journal ArticleDOI

Assessment and Categorization of Biological Effects and Atypical Symptoms Owing to Exposure to RF Fields from Wireless Energy Devices

Adel Razek
- 17 Jan 2023 - 
TL;DR: In this paper , the consequences of non-ionizing electromagnetic fields emitted by radiofrequency devices are analyzed and reviewed, as well as their evaluation techniques in the case of wireless digital communication tools.
Journal ArticleDOI

Investigation of Microwave Electromagnetic Fields in Open and Shielded Areas and Their Possible Effects on Biological Structure

TL;DR: In this article , the authors focus on actual measurements, especially in shielded spaces frequently used in everyday life, such as elevator cabins and cars, and evaluate the distribution of specific vector quantities of the electromagnetic field and a comparison with the currently valid hygiene standards.
Proceedings ArticleDOI

Electromagnetic Radiation Exposure from Mobile Phone Under Different Operational Scenarios

TL;DR: In this paper , a mobile phone is tested in different operational scenarios and analyzes the E field, H field and power intensity using an electrosmog meter (PC-EM-29).
Proceedings ArticleDOI

Microwave Profiling Inside Wood Beams using Computed SAR Images

TL;DR: In this article , the specific absorption rate (SAR) was used to estimate the power absorbed by living tissues and can be determined by numerical modeling, which can be used to image microwave radiation inside isotropic wood beams with a square crosssection with a density ranging from 60 to 1000 kg/m.
References
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Book

Wireless Communications: Principles and Practice

TL;DR: WireWireless Communications: Principles and Practice, Second Edition is the definitive modern text for wireless communications technology and system design as discussed by the authors, which covers the fundamental issues impacting all wireless networks and reviews virtually every important new wireless standard and technological development, offering especially comprehensive coverage of the 3G systems and wireless local area networks (WLANs).
Journal Article

Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz)

A Ahlbom
- 01 Jan 1998 - 
TL;DR: The International Commission on Non-Ionizing Radiation Protection (ICNIRP)—was established as a successor to the IRPA/INIRC, which developed a number of health criteria documents on NIR as part of WHO’s Environmental Health Criteria Programme, sponsored by the United Nations Environment Programme (UNEP).
Book

IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3kHz to 300 GHz

TL;DR: In this paper, the induced and contact current limits of IEEE C95.1-1991 are modified in this edition, and field strengths below which induced and current do not have to be measured are specified, spatial averaging and measurement distance requirements are clarified, and more precise definitions for averaging volume and radiated power are provided.
Journal ArticleDOI

Electromagnetic absorption in the human head and neck for mobile telephones at 835 and 1900 MHz

TL;DR: In this paper, the authors used the finite-difference time-domain method and a new millimeter-resolution anatomically based model of the human to study electromagnetic energy coupled to the head due to mobile telephones at 835 and 1900 MHz.
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