Specific absorption rate (SAR) measurement procedure for long term evolution (LTE) devices<br />

IEC PAS 63083:2017(E) applies to measurement procedures of Specific Absorption Rate (SAR) generated by devices with LTE (Long Term Evolution) technology specified by 3rd Generation Partnership Project (3GPP), Rel. 8 and 9 [1] where the devices are intended to be used with the radiating part in close proximity to the human head and body. This document supports both FDD and TDD modes. The objective of this document is to define the number of test conditions with respect to basic radio frequency aspects, i.e. channel bandwidths, number and offset of allocated resource blocks (RB), modulation, and maximum power reduction (MPR) for IEC 62209-1 and IEC 62209-2. This PAS is a technical specification not fulfilling the requirements for a standard, but made available to the public.

General Information

Status
Published
Publication Date
29-Jan-2017
Current Stage
PPUB - Publication issued
Start Date
30-Jan-2017
Completion Date
30-Jan-2017
Ref Project

Buy Standard

Technical specification
IEC PAS 63083:2017 - Specific absorption rate (SAR) measurement procedure for long term evolution (LTE) devices<br />
English language
28 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC PAS 63083
Edition 1.0 2017-01
PUBLICLY AVAILABLE
SPECIFICATION
colour
inside
Specific absorption rate (SAR) measurement procedure for long term evolution
(LTE) devices
IEC PAS 63083:2017-01(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2017 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in

Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional

documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical

iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and

variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of

committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been

and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: csc@iec.ch.
---------------------- Page: 2 ----------------------
IEC PAS 63083
Edition 1.0 2017-01
PUBLICLY AVAILABLE
SPECIFICATION
colour
inside
Specific absorption rate (SAR) measurement procedure for long term evolution
(LTE) devices
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20; 17.240 ISBN 978-2-8322-3764-9

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC PAS 63083:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Symbols and abbreviated terms ....................................................................................... 7

5 Protocol for SAR assessment .......................................................................................... 7

5.1 General LTE SAR testing considerations ................................................................ 7

5.1.1 Description of LTE Mode selection ................................................................... 7

5.2 Power and SAR Measurement Protocol ................................................................. 10

6 Uncertainty estimation ................................................................................................... 12

7 Measurement report ...................................................................................................... 12

Annex A (informative) Supporting information ...................................................................... 13

Annex B (informative) Maximum Power Reduction (MPR) .................................................... 18

Annex C (informative) Power test conditions ........................................................................ 19

Annex D (normative) RF Conducted Output Power Measurement ......................................... 20

Annex E (informative) RF Conducted LTE Modes to be tested for Band 3, 7 and 20 ............. 21

Bibliography .......................................................................................................................... 28

Figure 1 – Use of conducted power for LTE Mode selection .................................................. 10

Figure A.1 – Low, Middle, and High channel at 2 GHz band (Band 1) .................................... 14

Figure A.2 – RF conducted power vs. 10g SAR ..................................................................... 14

Figure A.3 – 1g SAR as a function of RF conducted power in various test conditions

(dashed lines indicate y=a*x linear regressions) ................................................................... 16

Table A.1 – CV of α .............................................................................................................. 15

Table A.2 – Maximum CV of α found in Study 2 .................................................................... 16

Table B.1 – Maximum Power Reduction (MPR) for Power Class 3 ........................................ 18

Table C.1 – Test Configuration Table without MPR ............................................................... 19

Table C.2 – Test Configuration Table with MPR .................................................................... 19

Table E.1 – Band 3 (1 710 MHz to 1 785 MHz) ..................................................................... 21

Table E.2 – Band 7 (2 500 MHz to 2 570 MHz) ..................................................................... 24

Table E.3 – Band 20 (832 MHz to 862 MHz) ......................................................................... 26

---------------------- Page: 4 ----------------------
IEC PAS 63083:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFIC ABSORPTION RATE (SAR) MEASUREMENT
PROCEDURE FOR LONG TERM EVOLUTION (LTE) DEVICES
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

A PAS is a technical specification not fulfilling the requirements for a standard, but made

available to the public.
IEC PAS 63083 has been processed by IEC technical committee 106: Methods for the

assessment of electric, magnetic and electromagnetic fields associated with human exposure.

The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
106/377/PAS 106/385/RVD

This PAS shall remain valid for an initial maximum period of 3 years starting from the

publication date. The validity may be extended for a single period up to a maximum of

3 years, at the end of which it shall be published as another type of normative document, or

shall be withdrawn.
---------------------- Page: 5 ----------------------
– 4 – IEC PAS 63083:2017 © IEC 2017
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it

contains colours which are considered to be useful for the correct understanding of its

contents. Users should therefore print this document using a colour printer.
---------------------- Page: 6 ----------------------
IEC PAS 63083:2017 © IEC 2017 – 5 –
INTRODUCTION

LTE technology shows an added complexity over previously available radio schemes and in

order to configure and test LTE devices, many signal parameters have to be taken into

account. The combinations of parameters in a given frequency band can result in hundreds of

LTE Modes and SAR test configurations. The main purpose of this protocol is to support the

demonstration of DUT compliance with applicable exposure limits based on a reasonable

number of SAR evaluations.
---------------------- Page: 7 ----------------------
– 6 – IEC PAS 63083:2017 © IEC 2017
SPECIFIC ABSORPTION RATE (SAR) MEASUREMENT
PROCEDURE FOR LONG TERM EVOLUTION (LTE) DEVICES
1 Scope

This Publicly Available Specification (PAS) applies to measurement procedures of Specific

Absorption Rate (SAR) generated by devices with LTE (Long Term Evolution) technology

specified by 3rd Generation Partnership Project (3GPP), Rel. 8 and 9 [1] where the devices

are intended to be used with the radiating part in close proximity to the human head and body.

This document supports both FDD and TDD modes. The objective of this document is to

define the number of test conditions with respect to basic radio frequency aspects, i.e.

channel bandwidths, number and offset of allocated resource blocks (RB), modulation, and

maximum power reduction (MPR) for IEC 62209-1 and IEC 62209-2.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

IEC 62209-1:2016, 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 – Part 1: Devices used next to the ear (Frequency range of 300 MHz

to 6 GHz)

IEC 62209-2, Human exposure to radio frequency fields from hand-held and body-mounted

wireless communication devices – Human models, instrumentation, and procedures – Part 2:

Procedure to determine the specific absorption rate (SAR) for wireless communication

devices used in close proximity to the human body (frequency range of 30 MHz to 6 GHz)

ETSI TR 121 905, Digital cellular telecommunications system (Phase 2+) (GSM); Universal

Mobile Telecommunications System (UMTS); LTE; Vocabulary for 3GPP Specifications
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ETSI TR 121 905 and

the following apply.
3.1
LTE Mode
specific operational characteristics of the DUT

Note 1 to entry: LTE Mode is the combination of channel frequency, channel bandwidth, modulation, number of

resource blocks, the offset of the resource blocks within the bandwidth, and the MPR.

3.2
Device Position
orientation and position of the DUT with respect to the phantom
3.3
Test Condition

Test Condition refers to the combination of both the LTE Mode and Device Position

---------------------- Page: 8 ----------------------
IEC PAS 63083:2017 © IEC 2017 – 7 –
4 Symbols and abbreviated terms

For the measurement procedures specified in this document, the symbols and abbreviated

terms of IEC 62209-1 and IEC 62209-2 shall apply.
5 Protocol for SAR assessment
5.1 General LTE SAR testing considerations

LTE technology shows an added complexity over previously available radio schemes. In order

to configure and test LTE devices, many signal parameters have to be taken into account:

frequency band, channel bandwidth (from 1.4 MHz to 20 MHz), modulation (QPSK and 16-

QAM), number of resource blocks allocated, offset of the resource blocks within the channel

bandwidth as well as MPR. The combinations of parameters in a given frequency band can

result in hundreds of LTE Modes and SAR test configurations. In order to address this a

specific protocol is necessary for SAR assessment of LTE devices. The main purpose of this

protocol is to support demonstration of DUT compliance with applicable limits based on a

reasonable number of SAR evaluations.

For a given LTE Mode and Device Position (Test Condition), the peak spatial-average SAR is

related to the maximum RF output power. As a consequence, RF conducted power

measurements can be used to quickly identify high SAR LTE Mode. SAR and RF conducted

power are however not directly proportional because:
i) RF conducted power is measured with a 50 Ohms load impedance;

ii) the antenna impedance of a DUT is generally not 50 Ohms and varies over frequency;

iii) the antenna impedance can be affected by Device Position and phantom coupling

conditions.

Because of this, a single SAR measurement using the LTE Mode with the highest measured

maximum conducted output power in a frequency band may not be sufficient to demonstrate

compliance unless the SAR value is significantly lower than the applicable compliance limit. In

the following, the required Test Conditions are established by applying the protocol in 5.2.

The LTE Test Conditions are measured according to the SAR measurement protocols in

IEC 62209-1 for devices used next to the ear and in IEC 62209-2 for hand-held and body-

mounted devices. This document only specifies the procedures to identify the LTE Test

Conditions that will most likely result in SAR levels closest to the highest and conservative

SAR result obtained from an up-scaling procedure.

For the above reasons, studies on the relationship between RF conducted power and SAR

were conducted by MT1 using handsets operating in Band 1, 4 and 17. The results in Annex A

show that:

• QPSK modulation with 1 RB allocation generally produces the highest peak spatial-

average SAR – MPR does not apply in this case.

• Peak spatial-average SAR has good correlation with the measured RF conducted output

power. The relationship deviates from proportionality by less than 25 % (k = 2).
• For LTE Modes with maximum conducted power lower than 85 % of P , where P is
max max

the highest measured maximum RF conducted output power across all LTE Modes in the

frequency band, it is highly unlikely that highest SAR results would be expected.

5.1.1 Description of LTE Mode selection

Conducted power shall be measured for the largest channel bandwidth supported by the LTE

Modes in each frequency band, using QPSK modulation with 1 RB allocation. The required

test channels shall be determined by 6.2.5 of IEC 62209-1:2016. If the number of required

channels is 1, the 1 RB shall be allocated at offset = centre; if the number of required

---------------------- Page: 9 ----------------------
– 8 – IEC PAS 63083:2017 © IEC 2017

channels is 3, the 1 RB shall be allocated at offset = 0, centre, and max within the channel

bandwidth. If the number of required channels is 5, the 1 RB shall be allocated at offset = 0,

centre, centre, centre and max within the channel bandwidth, respectively, for channels from

lowest to highest.

Other LTE Modes besides “QPSK modulation with 1 RB allocation” shall also be measured for

the different channel bandwidth configurations using the modulations and RB allocations

described in Table C.1 (without MPR) and C.2 (with MPR), which are specified by 3GPP for

conformance testing. Conducted maximum output power shall be measured using the
following test channel and RB offset configurations.

• When MPR does not apply, the configurations in Table C.1 are measured for the low and

middle channels with RB offset = 0 and RB offset = max for the high channel.
• When MPR applies, the configurations in Table C.2 are measured
– for the low channel with RB offset = max,
– for middle channel with RB offset = 0 and max,
– for high channel with RB offset = 0.

For “QPSK modulation with 1 RB allocation” in smaller channel bandwidth configurations,

when the same RB offset has already been measured in the highest channel bandwidth, such

RB offset configurations may be omitted. These correspond to RBs allocated next to the

channel edges; for example, offset = 0 for the low channel and max for the high channel for

5 MHz, 10 MHz, 15 MHz channel bandwidths in Band 1 may be omitted.

The conducted maximum output power measurements are illustrated in Figure 1 for 5 MHz,

10 MHz, 15 MHz, and 20 MHz channel bandwidths in Band 1 (1 920 MHz to 1 980 MHz) and

5 MHz and 10 MHz channel bandwidths in Band 17 (704 MHz to 716 MHz). The orange and

blue colour RBs correspond to test configurations that are specified by 3GPP for conformance

testing. The red colour RBs are the additional configurations required for QPSK and 1 RB

allocation in the largest channel bandwidth configuration, not specified for 3GPP conformance

testing. The low, middle and high channels are determined according to the IEC 62209-1

requirements. Annex E lists the LTE Modes to be tested in Band 3, 7 and 20.

NOTE Conducted power testing for additional LTE Modes is allowed, when the results form a superset of above

requirements (e.g. conducted power testing according to FCC requirements). When such a conducted power

superset is reported, all results shall be taken into account in following SAR test procedures.

---------------------- Page: 10 ----------------------
15 MHZ
20 MHz
5 MHZ 10 MHZ
IEC PAS 63083:2017 © IEC 2017 – 9 –
Middle
Low
High
5 MHz
Can be
1922.5 MHz
1950.0 MHz 1977.5 MHz
omitted
Low Middle
High
5 MHz
MPR = 0
QPSK
MPR ≤ 1 16QAM
QPSK
25 MPR ≤1,2
16QAM
1922.5 MHz 1950.0 MHz 1977.5 MHz
10 MHz
12 12 12
Orange and
blue colors
show
MPR ≤ 1
parameters
determined
MPR≤ 1,2
by 3GPP
1925.0 MHz 1950.0 MHz 1975.0 MHz
15 MHz
16 16
Red color
16 16 shows
16 16
additional
parameters
75 75
determined
1927.5 MHz 1950.0 MHz 1972.5 MHz
by this draft.
20 MHz
MPR = 0
MPR ≤ 1 18
100
MPR ≤ 1,2
1950.0 MHz 1970.0 MHz
1930.0 MHz
Figure 1a – Band 1 (1 920 MHz to 1 980 MHz)
---------------------- Page: 11 ----------------------
5 MHz 10 MHz
– 10 – IEC PAS 63083:2017 © IEC 2017
Middle
Low High
5 MHz
Can be
706.5 MHz
710 MHz 713.5MHz
omitted
Low Middle
High
5 MHz
MPR = 0
QPSK
MPR ≤ 1 16QAM
QPSK
25 MPR ≤ 1,2
16QAM
706.5 MHz 710 MHz 713.5MHz
10 MHz
12 12
12 MPR ≤1
MPR≤1,2
709 MHz 710 MHz 711MHz
Red color
Orange and
shows
blue colors
additional
show
parameters
parameters
determined
determined
by this draft.
by 3GPP
Figure 1b – Band 17 (700 MHz)
Figure 1 – Use of conducted power for LTE Mode selection
5.2 Power and SAR Measurement Protocol

The method described in IEC 62209-1 and IEC 62209-2 for the SAR measurement protocol

requires tests to be performed first at the channel that is closest to the center of the transmit

frequency band for each transmit antenna for all device test positions, all use configurations

and all operating modes. Secondly for the condition providing highest peak spatial-average

SAR determined in above, perform all tests at all other test frequency channels, e.g. lowest

and highest channels. Finally, the largest peak spatial-average SAR value is determined from

all of the previously tested configurations. The following protocol is exactly the same in

principle except that it commences with the LTE Mode with the highest conducted power

rather than the center of the transmit frequency band.
Step 1: RF conducted power measurement

RF conducted power measurement shall be performed for all LTE Modes described in the

previous section, where P(m) are the measured power for the m LTE Modes. The
measurement protocol for RF conducted output power is described in Annex D.
---------------------- Page: 12 ----------------------
IEC PAS 63083:2017 © IEC 2017 – 11 –
The LTE Mode with the highest measured maximum conducted output power in each
frequency band is identified as P .
max

The subset of LTE Modes in a frequency band with measured power greater than or equal to

85 % of P is identified as S.
max
Step 2: SAR measurement for the LTE Mode generating maximum RF conducted power
(P ) and Device Position causing maximum SAR
max

SAR measurement shall be performed for all Device Positions for the LTE Mode with

maximum RF conducted power (P ) to determine the Device Position with the highest peak

max
spatial-average SAR, identified as SAR .
STEP2

Three approaches can be applied to determine the highest peak spatial-average SAR in

step 3:
Approach 1 (AP1): Select the SAR measurement at Device Position causing maximum
SAR for Step 2

For the test position with the highest peak spatial-average SAR , multiply by 1.35 to yield

STEP2

the scaled highest peak spatial-average SAR, identified as AP1 SAR . The factor of 1.35

STEP3

is based on the k=2 value of the ratio between SAR and conducted power (α) determined from

Equation (A.1) and the two studies given in Annex A.

Approach 1 is fast method yielding a conservative estimate of the maximum SAR of the

device. If maximum SAR result obtained using this approach are above the SAR limit,

Approach 2 can be used to obtain more accurate maximum SAR result.
Approach 2 (AP2): SAR measurement at Device Position causing maximum SAR for
LTE Modes included in subset S

For the test position with the highest peak spatial-average SAR determined in Step 2,

STEP2

perform SAR measurements in this test position for the other LTE Modes included in the

subset S. The highest peak spatial-average SAR is identified as AP2 SAR .
STEP3

Approach 2 is the more accurate method, but requires testing of the LTE Modes in each

Subset S.
Approach 3 (AP3): Limited SAR measurements at Device Position causing maximum
SAR for LTE Modes included in subset S

For the test position with the highest peak spatial-average SAR determined in Step 2,

STEP2

perform SAR measurements in this test position for another LTE Mode having the highest

conducted power among all the untested LTE Modes included in the subset S. Multiply the

new measured peak spatial-average SAR by 1.35 to yield the new scaled peak spatial-

average SAR, identified as AP3 SAR . If AP3 SAR is not below the SAR limit
SCALED SCALED
repeat SAR measurement for the next LTE Mode as described above in this step,

otherwise select the highest value among all the measured peak spatial-average SAR results

and the last scaled value AP3 SAR and identify it as AP3 SAR .
SCALED STEP3
AP1 SAR , AP2 SAR or AP3 SAR shall be reported as maximum SAR for the
STEP3 STEP3 STEP3
LTE frequency band.

NOTE When assessing simultaneous multi-transmission SAR (e.g. LTE+WLAN), the maximum LTE SAR value for

each test position obtained using the above approaches AP1, AP2 or AP3, or combination of those, shall be

applied according to the simultaneous transmission SAR procedures in IEC 62209-1 or IEC 62209-2 for this

assessment.
---------------------- Page: 13 ----------------------
– 12 – IEC PAS 63083:2017 © IEC 2017
6 Uncertainty estimation

As the protocol described here is exactly the same in principle as that contained in both

IEC 62209-1 and IEC 62209-2 except it commences with the LTE Mode with the highest

conducted power rather than the center of the transmit frequency band, there is no change to

the uncertainty estimation for the peak spatial-average SAR.

The uncertainty estimation should be performed as outlined in IEC 62209-1 and IEC 62209-2.

7 Measurement report

The maximum conducted power measurement results shall be included in the SAR report to

identify the LTE Modes that required SAR measurement according to the protocol in this

document. The SAR measurement results shall be reported according to requirements of

IEC 62209-1 and IEC 62209-2.
---------------------- Page: 14 ----------------------
IEC PAS 63083:2017 © IEC 2017 – 13 –
Annex A
(informative)
Supporting information

The relationship between RF conducted power and peak spatial-average SAR is investigated

using the following equation, where m defines a given LTE Mode in a frequency band:

SAR(m) = α(m)P(m) (A.1)

The peak spatial-average SAR is proportional to RF conducted power P. However due to

antenna mismatch, phantom coupling and other conditions, the ratio between SAR and

conducted power (α) is expected to vary among the LTE Modes (m). In order to evaluate the

deviation of α among LTE Modes, two independent studies were conducted.
Study 1:

This study is fully described in [2], [3] and [4]. This study was performed according to the

protocol in IEC 62209-1 and therefore refers to low, middle and high channels. The protocol to

commence SAR testing with the LTE Mode with the highest RF conducted power was

recommended after the results of this study and Study 2 were combined. The following is a

summary of the test configurations:
• Device type and characteristics: Smartphones.

• Frequency and channels tested: Band 1 (1 920 MHz to 1 980 MHz); Low, Middle, and High

channel.
• Phantoms and test positions: SAM and Flat.
• Conducted power measurement configurations: Figure A.1.

NOTE Green colour bars mean measurements were not conducted for these conditions because these are

the same as those of 20 MHz bandwidth (largest channel bandwidth used in device).

• Number of DUTs: 4 different devices from 3 different manufacturers.
• Number of measurements: 42 for both conducted power and SAR.
---------------------- Page: 15 ----------------------
– 14 – IEC PAS 63083:2017 © IEC 2017
Middle
Low High
5 MHz
MPR = 0
QPSK
MPR = 1 16QAM
QPSK
MPR = 1,2
16QAM
1922.5 MHz 1950.0 MHz 1977.5 MHz
10 MHz
12 12 12
MPR = 1 16QAM
QPSK
MPR = 1,2
16QAM
1925.0 MHz
1950.
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.