IEC_TR_62630-2010.pdf

IEC/TR 62630Edition 1.0 2010-03TECHNICAL REPORT Guidance for evaluating exposure from multiple electromagnetic sources IEC/TR 62630:2010(E)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC,Geneva,Switzerland 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 from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.Droits de reproduction rservs.Sauf indication contraire,aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd,lectronique ou mcanique,y compris la photocopie et les microfilms,sans laccord crit de la CEI ou du Comit national de la CEI du pays du demandeur.Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplmentaires sur cette publication,utilisez les coordonnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 IEC/TR 62630Edition 1.0 2010-03TECHNICAL REPORT Guidance for evaluating exposure from multiple electromagnetic sources INTERNATIONAL ELECTROTECHNICAL COMMISSION XICS 17.220.20;33.050.10 PRICE CODEISBN 2-8318-1083-8 Registered trademark of the International Electrotechnical Commission colourinside 2 TR 62630 IEC:2010(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions and abbreviations.8 3.1 Terms and definitions.8 3.2 Physical quantities.16 3.3 Constants.16 3.4 Abbreviations.16 3.5 Vector notations.17 4 Overview.17 5 Classification of devices and EM sources.20 5.1 General aspects.20 5.2 Device classification based on the intended use:user-centric versus node-centric.20 5.3 EM source classification:single-channel versus band-wide transmitters.21 6 Combined exposure from multiple narrowband EM sources.23 6.1 Guidance on the selection of the exposure summation approach.23 6.2 Correlation between signals emitted by different EM sources.24 6.3 Relevant exposure metrics.24 6.4 Combined exposure from uncorrelated EM sources.25 6.5 Combined exposure evaluation of correlated EM sources.25 6.5.1 Accurate estimate of the true field vector sum.25 6.5.2 Conservative combined exposure evaluation using scalar sensors.26 Annex A(informative)Frequency allocations for some common wireless services.29 Annex B(informative)Supporting analytical details.32 Annex C(informative)Examples of combined exposure evaluations.39 Bibliography.46 Figure 1 Electrical paths from the radiating elements of each panel in a dual-panel antenna system to a field-point P on the-z symmetry plane.18 Figure 2 True vector sum of the complex field envelopes produced at the field-point P by the individual antenna panels in Figure 1 at two different measurement times.19 Figure 3 Simultaneous exposure at the location X by multiple sector-antennas belonging to adjacent tri-sector cellular masts(labelled#1 and#2).21 Figure 4 Different approaches yielding distinct upper-bounds of the field vector-sum.28 Figure B.1 Vectorial interpretation of inequality(B25),yielding an upper-bound of the true field vector-sum(red arrow).37 Figure C.1 CAD model of the antenna system for a mobile phone,including a GSM/UMTS antenna and a Bluetooth antenna.39 Figure C.2 Qualitative description of the individual and combined SAR distributions for a mobile phone transmitting simultaneousl