BS IEC/IEEE 62704-2:2017 BSl Standards Publication Licensed copy:IPLogin,University of Oxford, Version correct as o 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 bsi. BSIEC/IEEE 62704-2:2017 EO IEEE IEC/IEEE62704-2 Edition 1.02017-06 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 Determination du debit d'absorption spécifique (DAs) maximal moyenné dans le corps humain, produit par les dispositifs de communications sans fil, 3o MHz a 6 GHz - Partie 2: Exigences spécifiques relatives a la modelisation de I'exposition des antennes sur vehicule, a I'aide de la methode des differences finies dans le domaine temporel (FDTD) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS17.220.20 ISBN 978-2-8322-4259-9 Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agree. ?Regist BSIEC/IEEE62704-2:2017 - 2 - IEC/IEEE62704-2:2017 @IEC/IEEE 2017 CONTENTS FOREWORD.. INTRODUCTION.. Scope. .8 7 2 Normative references 8 3 Terms and definitions 4 Abbreviated terms. as of 30/07/2018 5 Exposure configuration modelling .10 5.1 General considerations .10 5.2 Vehicle modelling.. 10 5.3 Communications device modelling .11 .14 5.4 Exposed subject modelling.. 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 Validation of the numerical models ... .22 6 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 6.3 Validation of the vehicle numerical model .. 6.3.1 General .... 6.3.2 Vehicle model validation for bystander exposure simulations. ..27 6.3.3 Vehicle modelvalidationforpassenger exposure simulations. ..28 Computational uncertainty .. .30 7.1 General considerations . 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 ofthe numerical representation of the vehicle and pavement.. .31 7.2.4 Uncertainty of the antenna model .. 7.2.5 Uncertainty of SAR evaluation in the standard bystander and passenger .33 models.... 7.3 Uncertainty budget.. ..33 8 Benchmark simulation models 8.1 General.. ..34 8.2 Benchmark for bystander exposure simulations 8.3 Benchmark for passenger exposure simulations.. 9 Documenting SAR simulation results 9.1 General. ..38 9.2 Test device 9.3 Simulated configurations.. 9.4 Software and standard model validation.