IEC/IEEE 62704-3:2017
(Main)Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz - Part 3: Specific requirements for using the finite difference time domain (FDTD) method for SAR calculations of mobile phones
Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz - Part 3: Specific requirements for using the finite difference time domain (FDTD) method for SAR calculations of mobile phones
IEC/IEEE 62704-3:2017 defines the concepts, techniques, benchmark phone models, validation procedures, uncertainties and limitations of the finite difference time domain (FDTD) technique when used for determining the peak spatial-average specific absorption rate (SAR) in standardized head and body phantoms exposed to the electromagnetic fields generated by wireless communication devices, in particular pre-compliance assessment of mobile phones, in the frequency range from 30 MHz to 6 GHz. It recommends and provides guidance on the numerical modelling of mobile phones and benchmark results to verify the general approach for the numerical simulations of such devices. It defines acceptable modelling requirements, guidance on meshing and test positions of the mobile phone and the phantom models.
This document does not recommend specific SAR limits since these are found in other documents, e.g. IEEE C95.1-2005 and ICNIRP
Key words: Mobile Phone, Spatial-Average Specific Absorption Rate, Finite-Difference Time-Domain, Human Body
Détermination du débit d'absorption spécifique (DAS) maximal moyenné dans le corps humain, produit par les dispositifs de communication sans fil, 30 MHz à 6 GHz - Partie 3: Exigences spécifiques pour l'utilisation de la méthode des différences finies dans le domaine temporel (FDTD) pour les calculs de DAS des téléphones mobiles
IEC/IEEE 62704-3:2017 définit les concepts, techniques, modèles de téléphones de référence, procédures de validation, incertitudes et limites de la méthode des différences finies dans le domaine temporel (FDTD) lorsqu'ils permettent de déterminer le débit d'absorption spécifique (DAS) maximal moyenné dans les fantômes normalisés de la tête et du corps exposés aux champs électromagnétiques engendrés par les dispositifs de communication sans fil, notamment l'évaluation de préconformité des téléphones mobiles, dans la plage de fréquences comprises entre 30 MHz et 6 GHz. Le présent document recommande et fournit un guide sur la modélisation numérique des téléphones mobiles, ainsi que des résultats de référence qui permettent de vérifier l'approche générale des simulations numériques de ces dispositifs. Il spécifie des exigences de modélisation et un guide acceptables sur le maillage et les positions d'essai des modèles de téléphones mobiles et de fantômes.
Le présent document ne recommande pas de valeurs limites de DAS spécifiques dans la mesure où celles-ci peuvent être consultées dans d'autres documents, par exemple, IEEE C95.1-2005[1] et ICNIRP[2].
Mots clés: téléphones mobiles, début d'absorption spécifique maximal moyenné, différences finies dans le domaine temporel, corps humain
General Information
Buy Standard
Standards Content (Sample)
IEC/IEEE 62704-3 ®
Edition 1.0 2017-10
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 3: Specific requirements for using the finite difference time domain (FDTD)
method for SAR calculations of mobile phones
Détermination du débit d'absorption spécifique (DAS) maximal moyenné dans
le corps humain, produit par les dispositifs de communication sans fil, 30 MHz
à 6 GHz –
Partie 3: Exigences spécifiques pour l'utilisation de la méthode des différences
finies dans le domaine temporel (FDTD) pour les calculs de DAS des téléphones
mobiles
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 62704-3 ®
Edition 1.0 2017-10
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 3: Specific requirements for using the finite difference time domain (FDTD)
method for SAR calculations of mobile phones
Détermination du débit d'absorption spécifique (DAS) maximal moyenné dans
le corps humain, produit par les dispositifs de communication sans fil, 30 MHz
à 6 GHz –
Partie 3: Exigences spécifiques pour l'utilisation de la méthode des différences
finies dans le domaine temporel (FDTD) pour les calculs de DAS des téléphones
mobiles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-4772-3
– 2 – IEC/IEEE 62704-3:2017
© IEC/IEEE 2017
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Abbreviated terms . 9
5 Simulation procedure . 10
5.1 General . 10
5.2 General considerations . 10
5.3 General mesh settings . 10
5.4 Simulation parameters . 10
5.5 DUT model . 10
5.5.1 General . 10
5.5.2 Antenna . 12
5.5.3 RF source . 12
5.5.4 PCB . 13
5.5.5 Screen . 13
5.5.6 Battery and other larger metallic components . 14
5.5.7 Casing . 14
5.6 SAR calculation using phantom models. 14
5.6.1 General . 14
5.6.2 Head phantom model . 15
5.6.3 Body phantom model . 18
5.6.4 Phantom mesh generation . 18
5.7 Recording of results . 18
5.8 Peak spatial-average SAR calculation . 19
6 Benchmark models . 19
6.1 General . 19
6.2 Generic metallic box phone for 835 MHz and 1 900 MHz . 19
6.3 GSM/UMTS mobile phone . 21
6.4 Generic multi-band patch antenna mobile phone . 22
6.5 Neo Free Runner mobile phone . 24
7 Computational uncertainty . 25
7.1 General considerations . 25
7.2 Uncertainty of the test setup with respect to simulation parameters . 26
7.3 Uncertainty of the developed numerical model of the DUT . 26
7.4 Validation of the developed numerical model of the DUT. 26
7.5 Uncertainty budget . 26
8 Reporting simulation results . 27
8.1 General considerations . 27
8.2 DUT . 27
8.3 Simulated configurations . 27
8.4 Numerical simulation tool . 28
8.5 Results of the benchmark models . 28
8.6 Uncertainties. 28
8.7 SAR results . 28
© IEC/IEEE 2017
Annex A (informative) Additional results for the generic mobile phone with integrated
multiband antenna . 29
Annex B (informative) Additional results for the Neo Free Runner mobile phone . 31
Bibliography . 35
Figure 1 – An example of a multi-band antenna consisting of two metallic elements for
the GSM and UMTS frequency bands . 12
Figure 2 – An example of a source gap position that is inserted in replacement of a
real-life feeding spring pin. 13
Figure 3 – An example of a microstrip feed line. 13
Figure 4 – Orientation of the mobile phone model prior to positioning against the head
or the body phantom . 15
Figure 5 – Orientation of the SAM phantom prior to positioning against the DUT shown
in Figure 4 . 16
Figure 6 – Suggested steps for the cheek position of the DUT against the SAM
phantom . 16
Figure 7 – Tilt position of the DUT against the SAM phantom . 17
Figure 8 – Example of the full model space that includes the DUT and the SAM
phantom for the numerical simulations for the right cheek position . 17
Figure 9 – Example of the model space for the DUT/body phantom calculation setup . 18
Figure 10 – The SAM head phantom and the generic metallic box phone . 19
Figure 11 – Physical dimensions of the generic metallic box phone . 20
Figure 12 – Generic GSM/UMTS mobile phone . 21
Figure 13 – Generic mobile phone with integrated multiband patch antenna . 23
Figure 14 – CAD model of the Neo Free Runner mobile phone . 24
Figure A.1 – Real part of the input impedance of the antenna obtained with three
different commercially available software products. 29
Figure A.2 – Imaginary part of the input impedance of the antenna obtained with three
different commercially available software products. 30
Figure B.1 – Basic version of the Neo Free Runner CAD model . 31
Figure B.2 – Intermediate version of the Neo Free Runner CAD model . 31
Figure B.3 – Full version of the Neo Free Runner CAD model . 32
Figure B.4 – Interlaboratory comparison results of the free space reflection coefficient
for the basic CAD model . 32
Figure B.5 – Interlaboratory comparison results of the free space reflection coefficient
for the intermediate CAD model . 33
Figure B.6 – Interlaboratory comparison results of the free space reflection coefficient
for
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.