IEC/IEEE 62704-2:2017
(Main)Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz - Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas
Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz - Part 2: Specific requirements for finite difference time domain (FDTD) modelling of exposure from vehicle mounted antennas
IEC/IEEE 62704-2:2017 establishes the concepts, techniques, validation procedures, uncertainties and limitations of the finite difference time domain technique (FDTD) when used for determining the peak spatial-average and whole-body average specific absorption rate (SAR) in a standardized human anatomical model exposed to the electromagnetic field emitted by vehicle mounted antennas in the frequency range from 30 MHz to 1 GHz, which covers typical high power mobile radio products and applications. This document specifies and provides the test vehicle, human body models and the general benchmark data for those models. It defines antenna locations, operating configurations, exposure conditions, and positions that are typical of persons exposed to the fields generated by vehicle mounted antennas. The extended frequency range up to 6 GHz will be considered in future revisions of this document. This document does not recommend specific peak spatial-average and whole-body average SAR limits since these are found in other documents, e.g. IEEE C95.1-2005, ICNIRP (1998).
Key words: Electromagnetic Field, Finite-Difference Time Domain (FDTD), Spatial-Average Specific Absorption Rate (SAR), vehicle mounted antennas
Détermination du débit d'absorption spécifique (DAS) maximal moyenné dans le corps humain, produit par les dispositifs de communications sans fil, 30 MHz à 6 GHz - Partie 2: Exigences spécifiques relatives à la modélisation de l'exposition des antennes sur véhicule, à l'aide de la méthode des différences finies dans le domaine temporel (FDTD)
IEC/IEEE 62704-2:2017 définit les concepts, les techniques, les procédures de validation, les incertitudes et les limitations de la technique des différences finies dans le domaine temporel (FDTD) appliqués pour déterminer le débit d’absorption spécifique (DAS) maximal moyenné et le débit d’absorption spécifique global moyen. Cette détermination est réalisée au moyen d'un modèle normalisé de corps humain, exposé au champ électromagnétique émis par des antennes sur véhicule, dans la plage de fréquences de 30 MHz à 1 GHz, qui concerne les produits et les applications typiques de radio mobile haute puissance. La présente partie de l'IEC/IEEE 62704 définit et fournit les données relatives aux véhicules d’essai, aux modèles de corps humains et les données générales de référence pour ces modèles. Elle définit les emplacements des antennes, les configurations de fonctionnement, les conditions d’exposition et les positions typiques des personnes exposées aux champs générés par des antennes sur véhicule. La plage de fréquences étendue jusqu’à 6 GHz sera prise en compte dans les futures révisions du présent document. Le présent document ne recommande pas de limites spécifiques de DAS maximal moyenné et de DAS global moyen, celles-ci étant disponibles dans d’autres documents, par exemple, l’IEEE C95.1-2005, ICNIRP (1998).
Mots clés: champ électromagnétique, technique des différences finies dans le domaine temporel (FDTD), maximal moyenné, débit d’absorption spécifique (DAS), antennes sur véhicule
General Information
Buy Standard
Standards Content (Sample)
IEC/IEEE 62704-2 ®
Edition 1.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Determining the peak spatial-average specific absorption rate (SAR) in the
human body from wireless communications devices, 30 MHz to 6 GHz –
Part 2: Specific requirements for finite difference time domain (FDTD) modelling
of exposure from vehicle mounted antennas
Détermination du débit d’absorption spécifique (DAS) maximal moyenné dans le
corps humain, produit par les dispositifs de communications sans fil, 30 MHz à
6 GHz –
Partie 2: Exigences spécifiques relatives à la modélisation de l’exposition des
antennes sur véhicule, à l’aide de la méthode des différences finies dans le
domaine temporel (FDTD)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing being
secured. Requests for permission to reproduce should be addressed to either IEC at the address below or IEC’s
member National Committee in the country of the requester or from IEEE.
IEC Central Office Institute of Electrical and Electronics Engineers, Inc.
3, rue de Varembé 3 Park Avenue
CH-1211 Geneva 20 New York, NY 10016-5997
Switzerland United States of America
Tel.: +41 22 919 02 11 stds.ipr@ieee.org
Fax: +41 22 919 03 00 www.ieee.org
info@iec.ch
www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About the IEEE
IEEE is the world’s largest professional association dedicated to advancing technological innovation and excellence for
the benefit of humanity. IEEE and its members inspire a global community through its highly cited publications,
conferences, technology standards, and professional and educational activities.
About IEC/IEEE publications
The technical content of IEC/IEEE publications is kept under constant review by the IEC and IEEE. Please make sure
that you have the latest edition, a corrigendum or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets languages. Also known as the International
and iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, IEC publications issued since 2002. Some entries have
replaced and withdrawn publications. been collected from earlier publications of IEC TC 37, 77,
86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer
Service Centre: csc@iec.ch.
IEC/IEEE 62704-2 ®
Edition 1.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Determining the peak spatial-average specific absorption rate (SAR) in the
human body from wireless communications devices, 30 MHz to 6 GHz –
Part 2: Specific requirements for finite difference time domain (FDTD) modelling
of exposure from vehicle mounted antennas
Détermination du débit d’absorption spécifique (DAS) maximal moyenné dans le
corps humain, produit par les dispositifs de communications sans fil, 30 MHz à
6 GHz –
Partie 2: Exigences spécifiques relatives à la modélisation de l’exposition des
antennes sur véhicule, à l’aide de la méthode des différences finies dans le
domaine temporel (FDTD)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-4259-9
– 2 – IEC/IEEE 62704-2:2017
© IEC/IEEE 2017
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Abbreviated terms . 9
5 Exposure configuration modelling . 10
5.1 General considerations . 10
5.2 Vehicle modelling . 10
5.3 Communications device modelling . 11
5.4 Exposed subject modelling . 14
5.5 Exposure conditions . 15
5.6 Accounting for variations in population relative to the standard human body
model. 18
5.6.1 Whole-body average SAR adjustment factors . 18
5.6.2 Peak spatial-average SAR adjustment factors . 20
6 Validation of the numerical models . 22
6.1 Validation of antenna model . 22
6.1.1 General . 22
6.1.2 Experimental antenna model validation . 22
6.1.3 Numerical antenna model validation . 23
6.2 Validation of the human body model . 24
6.3 Validation of the vehicle numerical model . 26
6.3.1 General . 26
6.3.2 Vehicle model validation for bystander exposure simulations . 27
6.3.3 Vehicle model validation for passenger exposure simulations . 28
7 Computational uncertainty . 30
7.1 General considerations . 30
7.2 Contributors to overall numerical uncertainty in standard test configurations . 31
7.2.1 General . 31
7.2.2 Uncertainty of the numerical algorithm . 31
7.2.3 Uncertainty of the numerical representation of the vehicle and
pavement. 31
7.2.4 Uncertainty of the antenna model . 32
7.2.5 Uncertainty of SAR evaluation in the standard bystander and passenger
models. 33
7.3 Uncertainty budget . 33
8 Benchmark simulation models . 34
8.1 General . 34
8.2 Benchmark for bystander exposure simulations . 35
8.3 Benchmark for passenger exposure simulations . 36
9 Documenting SAR simulation results . 38
9.1 General . 38
9.2 Test device . 38
9.3 Simulated configurations . 38
9.4 Software and standard model validation . 38
© IEC/IEEE 2017
9.5 Antenna numerical model validation . 38
9.6 Results of the benchmark simulation models . 38
9.7 Simulation uncertainty . 39
9.8 SAR results . 39
Annex A (normative) File format and description of the standard human body models . 40
A.1 File format . 40
A.2 Tissue parameters . 42
Annex B (informative) Population coverage . 47
Annex C (informative) Peak spatial-average SAR locations for the validation and the
benchmark simulation models . 51
Bibliography . 52
Figure 1 – Antenna feed model . 12
Figure 2 – Voltage and current at the matched antenna feed-point . 13
Figure 3 – Bystander model (left) and passenger/driver model (right) for the SAR
simulations . 15
Figure 4 – Passenger and driver positions in the vehicle for the SAR simulations . 17
Figure 5 – Bystander positions relative to the vehicle for the SAR simulations . 17
Figure 6 – Experimental setup for antenna model validation . 23
Figure 7 – Benchmark configuration for bystander model exposed to a front or back
plane wave . 25
Figure 8 – Benchmark configuration for passenger model exposed to a front or back
plane wave . 26
Figure 9 – Configuration for vehicle numerical model validation . 27
Figure 10 – Side view (top) and rear view (bottom) benchmark validation configuration
for bystander and trunk mount antenna . 35
Figure 11 – Benchmark validation configuration for passenger and trunk mount
antenna . 37
Table 1 – Pavement model parameters . 14
Table 2 – Whole-body average SAR adjustment factors for the bystander and trunk
mount antennas . 19
Table 3 – Whole-body average SAR adjustment factors for the bystander and roof
mount antennas . 19
Table 4 – Whole-body average SAR adjustment factors for the passenger and trunk
mount antennas . 19
Table 5 – Whole-body average SAR adjustment factors for the passenger and roof
mount antennas . 20
Table 6 – Peak spatial-average SAR adjustment factors for the bystander mod
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.