IEC TR 62669:2019

Case studies supporting IEC 62232 - Determination of RF field strength, power density and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure

IEC/TR 62669:2019(E) is a Technical Report. This document presents a series of case studies in which electromagnetic (EM) fields are evaluated in accordance with IEC 62232:2017. The case studies presented in this document involve intentionally radiating base stations (BS). The BS transmit on one or more antennas using one or more frequencies in the range 110 MHz to 100 GHz and RF exposure assessments take into account the contribution of ambient sources at least in the 100 kHz to 300 GHz frequency range.
Each case study has been chosen to illustrate a typical BS evaluation scenario and employs the methods detailed in IEC 62232:2017. The case studies are provided for guidance only and are not a substitute for a thorough understanding of the requirements of IEC 62232:2017. Based on the lessons learned from each case study, recommendations about RF assessment topics to be considered in the next revision of IEC 62232 are proposed. The methodologies and approaches described in this document are useful for the assessment of early 5G products introduced for consumer trials or deployments.
This document provides background and rationale for applying a compliance approach based on the actual maximum transmitted power or EIRP. Guidance for collecting and analysing information about the transmitted power of a base station and evaluating its actual maximum RF exposure based on modelling studies or measurement studies on operational sites (in networks, sub-networks or field trials) is also presented.
This second edition cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
Keywords: Human Exposure, Wireless Communication Devices, RF field strength, power density and SAR in the vicinity of radiocommunication base stations

General Information

• Status: Published
• Publication Date: 04-Apr-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 13.280 - Radiation protection
• ICS: 17.240 - Radiation measurements
• Technical Committee: TC 106 - Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure
• Drafting Committee: MT 3 - TC 106/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 10-May-2019
• Completion Date: 05-Apr-2019

Relations

• Revises: IEC TR 62669:2011 - Case studies supporting IEC 62232 - Determination of RF field strength and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TR 62669 ®
Edition 2.0 2019-04
TECHNICAL
REPORT
colour
inside
Case studies supporting IEC 62232 – Determination of RF field strength, power
density and SAR in the vicinity of radiocommunication base stations for the
purpose of evaluating human exposure
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IEC TR 62669 ®
Edition 2.0 2019-04
TECHNICAL
REPORT
colour
inside
Case studies supporting IEC 62232 – Determination of RF field strength, power

density and SAR in the vicinity of radiocommunication base stations for the

purpose of evaluating human exposure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.280; 17.240 ISBN 978-2-8322-6795-0

– 2 – IEC TR 62669:2019 © IEC 2019
CONTENTS
FOREWORD . 10
INTRODUCTION . 12
1 Scope . 13
2 Normative references . 13
3 Terms and definitions . 13
4 Symbols and abbreviations . 17
4.1 Physical quantities . 17
4.2 Constants . 17
4.3 Abbreviated terms . 17
5 Overview of case studies . 18
6 Indoor small cell product compliance assessment using SAR measurements . 20
6.1 General description . 20
6.2 Implementation of IEC 62232:2017 . 20
6.2.1 Evaluation process . 20
6.2.2 Methodology . 21
6.2.3 Reporting . 22
6.3 Technical outcome . 22
6.4 Lessons learned . 22
7 Outdoor small cell product compliance assessment using SAR measurements . 23
7.1 General description . 23
7.2 Implementation of IEC 62232:2017 . 23
7.2.1 Evaluation process . 23
7.2.2 Methodology . 24
7.2.3 Reporting . 24
7.3 Technical outcome . 24
7.4 Lessons learned . 24
8 Small cell product installation compliance assessment using simplified installation
criteria . 24
8.1 General description . 24
8.2 Implementation of IEC 62232:2017 . 25
8.2.1 Evaluation process . 25
8.2.2 Methodology . 26
8.2.3 Reporting . 26
8.3 Technical outcome . 26
8.4 Lessons learned . 27
9 Small cell site in-situ measurements . 27
9.1 General description . 27
9.2 Implementation of IEC 62232:2017 for measurement Campaign A . 27
9.2.1 Evaluation process . 27
9.2.2 Methodology . 28
9.2.3 Reporting . 29
9.3 Implementation of IEC 62232:2017 for measurement Campaign B . 29
9.3.1 General description . 29
9.3.2 Case B (comprehensive exposure evaluation) . 30
9.3.3 Reporting . 31
9.4 Lessons learned . 31

10 Street cell product compliance assessment using SAR measurements and power
density spatial averaging . 31
10.1 General description . 31
10.2 Implementation of IEC 62232:2017 . 32
10.2.1 Evaluation process . 32
10.2.2 Methodology . 32
10.2.3 Reporting . 33
10.3 Technical outcome . 33
10.4 Validation study . 33
10.4.1 Validation process . 33
10.4.2 Comparison of spatial average field strength and whole-body SAR
results . 34
10.5 Lessons learned . 34
11 Macro site in-situ measurements . 34
11.1 General description . 34
11.2 Implementation of IEC 62232:2017 . 35
11.2.1 Evaluation process . 35
11.2.2 Methodology . 36
11.2.3 Reporting . 36
11.3 Technical outcome . 36
11.4 Lessons learned . 36
12 Macro site in-situ measurements using drones . 36
12.1 General description . 36
12.2 Implementation . 37
12.2.1 Evaluation system . 37
12.2.2 Evaluation process and methodology . 38
12.2.3 Reporting . 38
12.3 Technical outcome . 38
12.4 Lessons learned . 39
13 RF exposure assessment based on actual maximum transmitted power or EIRP . 39
13.1 General guidelines . 39
13.1.1 Technical background and rationale . 39
13.1.2 Guiding principles for conducting RF exposure assessment based on

the actual maximum approach . 42
13.1.3 EIRP evaluation assumptions . 42
13.1.4 Technology duty cycle factor assumptions . 43
13.1.5 Expected outcome of actual maximum approaches . 45
13.2 Modelling studies for BS using mMIMO . 45
13.2.1 Guiding principles . 45
13.2.2 Simulation model parameters . 45
13.2.3 Modelling case study A . 47
13.2.4 Modelling case study B . 49
13.2.5 Modelling case study C . 51
13.2.6 Lessons learned . 53
13.3 Measurement studies on operational sites with BS using mMIMO . 54
13.3.1 Guiding principles . 54
13.3.2 Measurement campaign parameters . 54
13.3.3 Experiment process . 55
13.3.4 Examples of RF exposure experiments . 57

– 4 – IEC TR 62669:2019 © IEC 2019
13.3.5 Lessons learned .
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