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<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3 Terms and definitions 4 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5 Simulation procedure 5.1 General 5.2 General considerations 5.3 General mesh settings 5.4 Simulation parameters 5.5 DUT model 5.5.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.5.2 Antenna 5.5.3 RF source Figures Figure 1 \u2013 An example of a multi-band antenna consisting of two metallic elements for the GSM and UMTS frequency bands <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.5.4 PCB 5.5.5 Screen Figure 2 \u2013 An example of a source gap position that is inserted in replacement of a real-life feeding spring pin Figure 3 \u2013 An example of a microstrip feed line <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.5.6 Battery and other larger metallic components 5.5.7 Casing 5.6 SAR calculation using phantom models 5.6.1 General <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.6.2 Head phantom model Figure 4 \u2013 Orientation of the mobile phone model prior to positioning against the head or the body phantom <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure 5 \u2013 Orientation of the SAM phantom prior to positioning against the DUT shown in Figure 4 Figure 6 \u2013 Suggested steps for the cheek position of the DUT against the SAM phantom <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure 7 \u2013 Tilt position of the DUT against the SAM phantom Figure 8 \u2013 Example of the full model space that includes the DUT and the SAM phantom for the numerical simulations for the right cheek position <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.6.3 Body phantom model 5.6.4 Phantom mesh generation 5.7 Recording of results Figure 9 \u2013 Example of the model space for the DUT\/body phantom calculation setup <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5.8 Peak spatial-average SAR calculation 6 Benchmark models 6.1 General 6.2 Generic metallic box phone for 835 MHz and 1\u200a900 MHz Figure 10 \u2013 The SAM head phantom and the generic metallic box phone <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure 11 \u2013 Physical dimensions of the generic metallic box phone Tables Table 1 \u2013 Dielectric parameters of the materials of the generic phone <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.3 GSM\/UMTS mobile phone Figure 12 \u2013 Generic GSM\/UMTS mobile phone Table 2 \u2013 Peak spatial-average SAR for 1 g and 10 g of the benchmark <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.4 Generic multi-band patch antenna mobile phone Table 3 \u2013 Dielectric properties of the materials ofthe generic GSM\/UMTS mobile phone Table 4 \u2013 Peak 1 g and 10 g SAR results of the GSM\/UMTS mobile phone <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Figure 13 \u2013 Generic mobile phone with integrated multiband patch antenna Table 5 \u2013 Limits of the output parameters for the generic multi-band mobile phone <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 6.5 Neo Free Runner mobile phone Figure 14 \u2013 CAD model of the Neo Free Runner mobile phone Table 6 \u2013 Peak 1 g and 10 g SAR results of the GSM\/UMTS mobile phone <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7 Computational uncertainty 7.1 General considerations Table 7 \u2013 Dielectric properties of the materials of the Neo Free Runner mobile phone Table 8 \u2013 Peak 1 g and 10 g SAR results of the Neo Free Runner mobile phone <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.2 Uncertainty of the test setup with respect to simulation parameters 7.3 Uncertainty of the developed numerical model of the DUT 7.4 Validation of the developed numerical model of the DUT 7.5 Uncertainty budget <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 8 Reporting simulation results 8.1 General considerations 8.2 DUT 8.3 Simulated configurations Table 9 \u2013 Overall uncertainty budget <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 8.4 Numerical simulation tool 8.5 Results of the benchmark models 8.6 Uncertainties 8.7 SAR results <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Annex A (informative) Additional results for the generic mobile phone with integrated multiband antenna Figure A.1 \u2013 Real part of the input impedance of the antenna obtained with three different commercially available software products <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Figure A.2 \u2013 Imaginary part of the input impedance of the antenna obtained with three different commercially available software products <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex B (informative) Additional results for the Neo Free Runner mobile phone Figure B.1 \u2013 Basic version of the Neo Free Runner CAD model Figure B.2 \u2013 Intermediate version of the Neo Free Runner CAD model <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure B.3 \u2013 Full version of the Neo Free Runner CAD model Figure B.4 \u2013 Interlaboratory comparison results of the free space reflection coefficient for the basic CAD model <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure B.5 \u2013 Interlaboratory comparison results of the free space reflection coefficient for the intermediate CAD model Figure B.6 \u2013 Interlaboratory comparison results of the free space reflection coefficient for the full CAD model <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Table B.1 \u2013 Frequency limits of the \u22126 dB reflection coefficient for the three different versions of the Neo Free Runner mobile phone <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz\u00a0to 6 GHz – Specific requirements for using the finite difference time domain (FDTD) method for SAR calculations of mobile phones<\/b><\/p>\n |