EMF Exposure Assessment

Standards Update

Jafar Keshvari, Chairman of IEC MT1 and IEEE/ICES TC34

Adj. Professor of Bio-electromagnetics

WHO EMF program IAC meeting, 04-06.05.2015

Discussion order

Setting Expsoure limits &

Assessming EMF

expsoures

Near field and far field assessment

EMF expsoure

assesment

Numerical and

measurement EMF

assessment

EMF assessment standards in

IEC and IEEE/ICES

Guidelines for expsoure asessment

development activities

Setting Expsoure limits and Assessing expsoures

• EMF Exposure Limits/Standards

• Define limits on RF exposure

• International organizations

• ICNIRP

• IEEE/ICES

• Organizations involved in EMF exposure asessment standards

• IEEE

• IEC

• ITU

EMF assessment Standardization bodies

IEEE/ICES• ICES Technical

committee TC34 responsible for developing the

compliance assessment of

wireless communication

devices

IEC• TC106 responsible for

the compliance assessment of

wireless communication

devices

ITU-T• Sub organizatrion of

UN, An organization based on public-

private partnership since its inception

• ITU-T SG5 activity also includes human expsoure evaluation

Liasion agreement exists between all these organizations regarding EMF compliance assessment standards.

Far field > 20 cm and Near field ≤ 20 cm Assessment

Far field > 20 cm and Near field ≤ 20 cm Asesssment

• Mobile installations: (MPE @ ≥ 20 cm)

• Antennas on non-permanent objectes & structures, vehicle-mounted antennas, desktop configurations etc.

• Maximum permissible Exposure (MPE) according to field strength and power density limits based on whole body SAR averaging concepts are used for evaluating the exposure conditions of fixed and mobile exposure conditions.

• SAR compliance is with respect to both whole-body and partial body SAR limits.

• Portable operations: (SAR @ < 20 cm).

• Devices at close proximity to persons.

• Localized exposure in near-field conditions, very complicated interaction.

• Wireless handsets, Wi-Fi products etc.

IEC and IEEE/ICES EMF expsoure assessment team

San Francisco, Jan 2015

IEC TC106

• IEC is Not-for-profit, non-governmental organization, founded in 1906

• The IEC is one of three global sister organizations IEC, ISO and ITU.

• IEC TC106 was created in October 1999

• the scope of TC 106 covers a large portion of the electromagnetic spectrum (0 to 300 GHz).

• The low frequency range: covers transmission and distribution networks, domestic and industrial equipment, railways, etc.

• The high frequency range comprises wireless communication devices, broadcast emitters, devices for electronic article surveillance, etc.

IEC TC106

• Three teams active in TC106:

• IEC MT1 (IEC 62209 series of standards)

• IEC MT2 (LF assessment standards)

• IEC MT3 (Base station assessment standards)

• IEC PT 62209-3 (Vector probe arrays based technology)

• Formal “A” liaison and dual logo agreement between IEC and IEEE.

• Both committees work closely in compliance assessment standards

development

Not included in the scope of TC106

•Clear responsibility share between IEC and ICNIRP; EMF exspoure guidelines developed by ICNIRP and EMF exspoure assessment standards developed by IEC.

IEEE ICES

Technical Committee 34

IEEE ICES

Technical Committee 34

• ICES Technical Committee 34—Scope:

“The development of product standards relative to the safe use of

electromagnetic energy for specific products that emit electromagnetic energy at

frequencies between 0 and 300 GHz, i.e., the frequency range covered by the

basic restrictions and maximum permissible exposure (MPE) values developed

by the IEEE International Committee on Electromagnetic Safety (ICES).”

• Standards are published as IEEE 1528 series of standards

• Newly established committee: SC6 ”EMF dosimetry moedling” focusing on LF

mainly on electrostimulation. Chairman: Akimasa Hirata

• BIOEM 2015: Workshop on Current Status of LF Dosimetry Modeling,

IEEE/ICES

Assessment of EMF expsoure is carried out either

bay measurement or by calculation

IEEE 1528 & IEC 62209-1

IEC 62209-2

Measurement or Calculation?

•Measurement: Everybody trust the measurement results except the one who measures it!

•Calculation: Nobody trust the calculation results except the one who has calculates it!

• So far calculation is applied for the cases where measurements have not been possible

• Medical applications

• Large scale devices; airplanes, vehicles, etc...

• Risky applications

Measurement standards, Near Field

• IEEE 1528, IEC 62209-1 & IEC 62209-2 overview

• SAR Measurement from wireless devices used close to the body

• Conservative estimate of exposure

• The revised version of IEC 62209-1/2005 will be published by the

end of 2015

IEC 62209 standards Time line

IEC 62209-1 (head expsoure std) FDIS submitted

for voting by NC’s by June 2015

- Revision of IEC 62209-2 (body exposure

assessment) delayed till the end of 2015.

- unification of part 1 & part 2 starts late 2015

Unified IEC 62209-1 & IEC 62209-2 std

During 2016

New Project: IEC PT 62209-3

• Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices - Human models, instrumentation, and procedures – Part 3: Vector probe systems

(Frequency range of 100 MHz to 6 GHz)

Numerical standards in IEEE and IEC

Numerical standards in IEEE and IEC…

Numerical standards in IEEE and IEC…

New Project: IEC PT 62209-3

• Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices - Human models, instrumentation, and procedures – Part 3: Vector probe systems

(Frequency range of 100 MHz to 6 GHz)

1. Intentionally radiating RBS between 110 MHz to 40 GHz#

(Ambient fields from 3 kHz to 300 GHz)

2. Specification of several RF field strength and SAR assessment

methodologies

3. Product compliance, Product installation compliance, In-situ RF

exposure assessments

4. The std to be published during 2016

IEC 62232 Base station exposure assessment std

standard

“Determination of RF field strength and SAR in the vicinity of radio-

communication base stations for the purpose of evaluating human exposure”

#An extension of the upper limit to 100 GHz is planned in the ongoing

maintenance work

• The basic CENELEC standard used for the head exposure assessment is EN

50360, EN62209-1 (IEC 62209-1).

• CENELEC or IEC do not have the responsibility to establish RF exposure limits,

just develop EMF assessment protocols/standards.

• Is the procedure and the test phantom (SAM) conservative regarding children?

Formal Objection against EN 50360_2001 Product

standard to demonstrate the compliance of mobile

phones with the basic restrictions related to human

exposure to electromagnetic fields (300 MHz - 3

GHz)

• The compliance test procedure that is using the test phantom (SAM)

defined in EN62209-1 is conservative for children and adults.

• The compliance test procedure that is using the equivalent head liquid

defined in EN62209-1 is conservative for children and adults.

• The compliance test procedure that is using the test positions defined

in EN62209-1 is conservative for children and adults.

• Therefore the compliance test procedures specified in EN62209-1 are

conservative for both children and adults.

Formal Objection against EN 50360_2001 Product

standard to demonstrate the compliance of mobile

phones with the basic restrictions related to

human exposure to electromagnetic fields

(300 MHz - 3 GHz)

How harmonized are EMF assessment stds

• Liasion agreement between IEEE and IEC

• Dual logo agreement between IEEE and IEC

• Parallel voting agreement between CENELEC

& IEC

New team estabilshed in IEC to work on:

” Guide for scientific framework and requirements in

developing EMF compliance assessment standards”

in liaison with IEEE/ICES) and ITU

• Harmonization of EMF compliance assessment standards by having

a common understanding and agreement of the scientific principals

in which the foundation of an EMF assessment standard is built on.

• In order to avoid inconsistencies in the compliance assessment

standards and foster harmonization of standards between these

standardization organizations, through “A” liaison collaboration

with IEEE/ICES and ITU the IEC TC106 will work on developing a

Guide which provides the scientific building blocks in which EMF

exposure compliance standards are based.

• The team is established in IEC, and is planed/expected to be a dual

logo IEC- IEEE Guide or a separate IEEE std.

• IEC SMB is in contact with ITU regarding the liaison collaboration.

• Activity has already started, several teleconferences has taken

place, 1st face to face meeting in Paris on 11th May.

Thank you!

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