IEC TR 63170:2018

Measurement procedure for the evaluation of power density related to human exposure to radio frequency fields from wireless communication devices operating between 6 GHz and 100 GHz

IEC/TR 63170:2018(E) is a Technical Report. This document describes the state of the art measurement techniques and test approaches for evaluating the local and spatial-average incident power density of wireless devices operating in close proximity to the users between 6 GHz and 100 GHz.
In particular, this document provides guidance for testing portable devices in applicable operating position(s) near the human body, such as mobile phones, tablets, wearable devices, etc. The methods described in this document may also apply to exposures in close proximity to base stations.
This document also gives guidance on how to assess exposure from multiple simultaneous transmitters operating below and above 6 GHz (including combined exposure of SAR and power density).
Key words: Human Exposure, Wireless Communication Devices, Radio Frequency Fields from 6Ghz to 100GHz

General Information

• Status: Withdrawn
• Publication Date: 14-Aug-2018
• Withdrawal Date: 29-Apr-2024
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: TC 106 - Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure
• Current Stage: WPUB - Publication withdrawn
• Start Date: 30-Apr-2024
• Completion Date: 30-Apr-2024

Standards Content (Sample)

IEC TR 63170 ®
Edition 1.0 2018-08
TECHNICAL
REPORT
colour
inside
Measurement procedure for the evaluation of power density related to human
exposure to radio frequency fields from wireless communication devices
operating between 6 GHz and 100 GHz

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IEC TR 63170 ®
Edition 1.0 2018-08
TECHNICAL
REPORT
colour
inside
Measurement procedure for the evaluation of power density related to human

exposure to radio frequency fields from wireless communication devices

operating between 6 GHz and 100 GHz

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-5878-1

– 2 – IEC TR 63170:2018 © IEC 2018
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 11
4 Symbols and abbreviated terms . 15
4.1 Symbols . 15
4.1.1 Physical quantities . 15
4.1.2 Constants . 15
4.2 Abbreviated terms . 16
5 Description of the measurement system . 16
5.1 General . 16
5.2 Scanning system . 16
5.3 Device holder . 17
5.4 Reconstruction algorithms . 17
6 Power density assessment . 17
6.1 General . 17
6.2 Measurement preparation . 19
6.2.1 System check . 19
6.2.2 Preparation of the device under test . 20
6.2.3 Operating modes . 20
6.2.4 Test frequencies for DUT . 20
6.2.5 Evaluation surface and DUT test position . 21
6.3 Tests to be performed . 23
6.4 General measurement procedure . 23
6.4.1 General . 23
6.4.2 Power density assessment based on E- and H-field . 24
6.4.3 Power density measurement based on the evaluation of E-field or H-
field amplitude only . 25
6.5 Measurements of devices with multiple antennas or multiple transmitters . 26
6.5.1 General . 26
6.5.2 Examples. 28
7 Uncertainty estimation . 30
7.1 General considerations . 30
7.2 Uncertainty model . 30
7.3 Uncertainty components dependent on the measurement system . 30
7.3.1 Calibration of the measurement equipment . 30
7.3.2 Probe correction . 30
7.3.3 Isotropy . 31
7.3.4 Multiple reflections. 31
7.3.5 System linearity . 31
7.3.6 Probe positioning . 31
7.3.7 Sensor location . 31
7.3.8 Amplitude and phase drift . 31
7.3.9 Amplitude and phase noise . 31
7.3.10 Data point spacing . 32

7.3.11 Measurement area truncation . 32
7.3.12 Reconstruction algorithms . 32
7.4 Uncertainty terms dependent on the DUT and environmental factors . 32
7.4.1 Probe coupling with DUT . 32
7.4.2 Modulation response . 32
7.4.3 Integration time . 32
7.4.4 DUT alignment . 32
7.4.5 RF ambient conditions . 33
7.4.6 Measurement system immunity/secondary reception. 33
7.4.7 Drift of DUT . 33
7.5 Combined and expanded uncertainty . 33
8 Measurement report . 35
8.1 General . 35
8.1.1 General . 35
8.1.2 Items to be recorded in the measurement report . 35
9 Recommendation for future work . 36
9.1 Measurement standard for EMF compliance assessment of devices
operating at frequencies above 6 GHz . 36
9.1.1 General . 36
9.1.2 Test frequencies . 37
9.1.3 Evaluation surfaces . 37
9.1.4 Evaluation of exposure from multiple transmitters . 38
9.1.5 Other future work items . 38
9.2 Numerical standard for EMF compliance assessment of devices operating at
frequencies above 6 GHz . 39
9.3 Updates to IEC 62232 . 39
Annex A (informative) Measurement system check and validation . 40
A.1 Background. 40
A.1.1 General . 40
A.1.2 Objectives of system check . 40
A.1.3 Objectives of system validation . 40
A.2 Measurement setup and procedure for system check and system validation . 41
A.2.1 General . 41
A.2.2 Power measurement setups . 41
A.2.3 Procedure to normalize the measured power density . 42
A.3 System check . 42
A.3.1 System check sources and test conditions . 42
A.3.2 Test procedure . 42
A.4 System validation . 42
A.4.1 Reference sources and test conditions . 42
A.4.2 System validation procedure . 43
Annex B (informative) Examples of reference sources . 44
B.1 Background. 44
B.2 Cavity-fed dipole arrays . 44
B.2.1 Description . 44
B.2.2 Target values . 47
B.3 Pyramidal horns loaded with a slot array . 52
B.3.1 Description . 52
B.3.2 Target values .
...