IEC PAS 63151:2018

Measurement procedure for the assessment of specific absorption rate of human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices - Vector measurement-based systems (Frequency range of 30 MHz to 6 GHz)

IEC PAS 63151:2018(E) specifies protocols and test procedures for the reproducible measurement of the peak spatial-average specific absorption rate (psSAR) induced inside a simplified model of the head or the body by radio-frequency (RF) transmitting devices, with a defined uncertainty. It provides requirements for systems using vector measurement-based systems. Such systems determine the psSAR by 3D field reconstruction within the volume of interest by specifying the requirements for the measurement system, calibration, uncertainty assessment and validation methods. The protocols and procedures apply for a significant majority of people including children during use of hand-held and body-worn wireless communication devices.
This PAS is applicable to any wireless communication device intended to be used at a position near the human head or body at distances up to and including 200 mm. This PAS can be employed to evaluate SAR compliance of different types of wireless communication devices used next to the ear, in front of the face, mounted on the body, combined with other RF-transmitting or non-transmitting devices or accessories (e.g. belt-clip), or embedded in garments. The overall applicable frequency range is from 30 MHz to 6 GHz.
The system validation procedures provided within this PAS cover frequencies from 600 MHz to 6 GHz.
Some specifications (e.g., validation antennas and other procedures or requirements) are not yet defined over the full frequency range within the scope of this document but will be included in a future revision.
The device categories covered include but are not limited to mobile telephones, cordless microphones, auxiliary broadcast devices and radio transmitters in personal computers, desktop, laptop devices, multi-band, multi-antenna, and push-to-talk devices.

General Information

• Status: Withdrawn
• Publication Date: 14-Jan-2018
• Withdrawal Date: 26-Mar-2020
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 17.240 - Radiation measurements
• 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• Current Stage: WPUB - Publication withdrawn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: 27-Mar-2020
• Completion Date: 27-Mar-2020

Standards Content (Sample)

IEC PAS 63151 ®
Edition 1.0 2018-01
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Measurement procedure for the assessment of specific absorption rate of
human exposure to radio frequency fields from hand-held and body-mounted
wireless communication devices – Vector measurement-based systems
(Frequency range of 30 MHz to 6 GHz)

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IEC PAS 63151 ®
Edition 1.0 2018-01
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Measurement procedure for the assessment of specific absorption rate of

human exposure to radio frequency fields from hand-held and body-mounted

wireless communication devices – Vector measurement-based systems

(Frequency range of 30 MHz to 6 GHz)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20, 17.240 ISBN 978-2-8322-5178-2

– 2 – IEC PAS 63151:2018 © IEC 2018

CONTENTS
FOREWORD . 7

INTRODUCTION . 9

1 Scope . 10

2 Normative references . 10

3 Terms and definitions . 11

4 Symbols and abbreviated terms . 11

5 Overview of the measurement procedure . 11

6 Measurement system specifications . 13
6.1 General requirements . 13
6.2 Phantom specifications . 15
6.2.1 Head Phantom specifications – shell . 15
6.2.2 Body Phantom specifications – shell . 15
6.2.3 Tissue-equivalent medium material properties . 15
6.3 Hand and Device holder considerations . 16
6.4 Measurement system requirements . 16
6.4.1 General . 16
6.4.2 Single probe measurement system specifications . 16
6.4.3 Array measurement system specifications . 16
6.5 Device holder specification . 17
6.6 Reconstruction algorithm and peak spatial-averaging specifications . 18
7 Protocol for SAR assessment . 18
7.1 Measurement preparation . 18
7.1.1 Preparation of tissue-equivalent medium . 18
7.1.2 System check . 19
7.1.3 Preparation of the device under test . 19
7.1.4 Operating modes . 19
7.1.5 Position of the DUT in relation to the phantom . 19
7.1.6 Positions of the DUT in relation to the flat phantom for large DUT . 19
7.1.7 Test frequencies for DUT . 20
7.2 Tests to be performed . 21
7.3 General measurement procedure . 22
7.3.1 Measurement procedure for single probe systems . 22

7.3.2 Measurement procedure for array systems . 22
7.4 SAR measurements for simultaneous transmission . 22
7.4.1 SAR measurements for non-correlated signals . 22
7.4.2 SAR measurements for correlated signals . 23
8 Uncertainty estimation . 24
8.1 General . 24
8.2 Requirements on the uncertainty evaluation . 25
8.3 Description of uncertainty models . 25
9 Measurement report . 30
Annex A (normative) Phantom specifications . 31
A.1 SAM phantom specifications . 31
A.1.1 SAM phantom geometry. 31
A.1.2 SAM Phantom shell . 35
A.1.3 Tissue Equivalent Medium . 36

A.2 Flat phantom specifications . 37

A.3 Specific phantoms. 38

A.4 Tissue-equivalent medium . 39

Annex B (normative) Calibration and characterization of dosimetric probes. 40

B.1 Introduction . 40

B.2 Types of calibration . 40

B.2.1 Amplitude calibration with analytical fields . 40

B.2.2 Amplitude and phase calibration by transfer calibration . 41

B.2.3 Amplitude and phase calibration using numerical reference . 42

Annex C (informative) Field Reconstruction Techniques . 45
C.1 Introduction . 45
C.2 Objective of Field Reconstruction Techniques . 45
C.3 Background. 45
C.4 Reconstruction Techniques . 47
C.4.1 Expansion Techniques . 47
C.4.2 Source Reconstruction Techniques . 48
C.4.3 Source Base Function Decomposition . 48
C.4.4 Phase Reconstruction . 48
C.4.5 Other Approaches . 48
C.5 Source reconstruction and SAR estimation from fields measured outside the
phantom. 49
Annex D (normative) SAR measurement system verification and validation . 50
D.1 Introduction . 50
D.1.1 Objectives and purpose of system check . 50
D.1.2 Objectives of system validation . 50
D.2 SAR measurement setup and procedure for system check and system
validation . 51
D.2.1 General . 51
D.2.2 Power measurement setups . 52
D.2.3 Procedure to normalize the measured SAR. 53
D.2.4 Power measurement uncertainty . 55
D.3 System check . 56
D.3.1 System check antennas and test conditions . 56
D.3.2 System check acceptance criteria . 56
D.4 System validation . 57

D.4.1 Requirements for system validation antennas and test conditions . 57
D.4.2 Test positions for system validation . 58
D.4.3 System validation procedure based on peak spatial-average SAR . 61
D.4.4 Validation acceptance criteria . 70
Annex E (informative) Interlaboratory comparisons . 71
E.1 Purpose . 71
E.2 Monitor laboratory . 71
E.3 Phantom set-up . 71
E.4 Reference devices . 71
E.5 Power set-up . 71
E.6 Interlaboratory comparison – Procedure. 72
Annex F (normative) Validation antennas . 73
F.1 Introduction .
...