Nairobi, Kenya, 26 – 27July 2010 Revue on RF Safety Reference Levels and Measurement protocols Christian BLANCHARD CEO Planet Network International ITU-T Workshop on Delivering Good Quality Telecommunication Service in a Safe Environment in Africa (Nairobi, Kenya, 26 July – 27 July 2010 )

Revue on RF Safety Reference Levels and Measurement protocols

CONTEXT

How to maintain the coverage by reducing the level of exposure to very low level ? IN FRANCE Grenelle des antennes BASE STATION DISMANTLING IN FRANCE (decision taken by the court of law):  Bouygues Telecom : 4 Feb 2009 – Tassin demi-lune  SFR : 16 Feb 2009 – Carpentras  Orange : 5 Mar 2009 – Notre Dame d’Alençon Samsung (Netherlands) cancel delivery of non compliant mobile phones CONTEXT

ICNIRP International Commission on Non-Ionizing Radiation Protection Basic Restrictions 4 W/kg SAR full body 0,4 W/kg /10 0,08 W/kg / Thermal effects SAR Local 10 g 2 W/kg 4 W/kg SAR : Specific Absorption Rate

Normative SAR Measurement Probe liquid phantom positioning device Voltmeter robot tables Control Software Base station emulator

7 2 Steps for SAR measurement: Area scan 4mm from the phantom surface 8mm between each point Volume scan above the maximum position From 175 to 350pts (5 to 10min) Mean value of the DAS value in a volume of 10 or 1g –10g : 21mm cube –1g : 10mm cube Normative SAR Measurement

Frequency en MHz E in V/m SAR Measurement is : complex long expensive system  ICNIRP has defined, in parallel of Basic Restriction, the Reference Levels (measurement of electromagnetic field) defined by simulation, conservative. Reference levels 92 V/m 42 V/m 127 V/m 58 V/m Reference Level

Frequency in MHz E field in V/m __ Worker __ General Public ICNIRP defines 2 categories for human exposure: workers (short exposure duration) public (long exposure duration) Workers / General Public limits

Workers exposure limits The workers exposure limits follow the European directive 2004/40/CE of 29 April 2004 for limiting exposure to electromagnetic fields. This directive has to be transposed in the law of the members of the EC and is based on ICNIRP Reference level In Europe … Which levels to refer to? How to measure Levels? CENELEC: As a result of the acceptance of the European Directive 2004/40/EC, the European Commission has given a Mandate M/351 to CEN/CENELEC, dated June 2004, to develop harmonized standards for the assessment, measurement and calculation of workers' exposure to static magnetic and varying electric, magnetic and electromagnetic fields with frequencies from 0Hz to 300GHz.  no protocol adopted for the moment

Workers exposure limits CENELEC European Directive 2004/40/EC  CENELEC TC 106 WG 4  Obligation for employer to guarantee the safety of their workers (level of exposure must remain under the ICNIRP reference level). Each country has its own philosophy to make the site safe: definition of the emitters definition of the security perimeters by “manual” calculation If obligation of standing near an emitter or in the case of co-sitting site, maintenance, to prevent unexpected emission. control levels using dosimeter by simulation using software

Frequency in MHz E field in V/m __ Worker __ General Public Workers / General Public limits

Public exposure limits In France … In France, the decree of May 2002 (n° ) follows the European recommendation (ICNIRP). Verified by licensed companies that makes selective measurement with INSITE Free

Public exposure limits In Switzerland

This Recommendation specifies in-situ measurement procedures in order to assess electromagnetic fields for the purpose of comparison against limits for human exposure applying in CEPT countries. ECC RECOMMENDATION (02)04 MEASURING NON-IONISING ELECTROMAGNETIC RADIATION (9 kHz – 300 GHz) The French protocol measurement is based on this recommendation, considering the three decision levels, performing first a broadband scanning with isotropic probes, then a selective frequency check in those places where the first decision level (field higher then 0.28 V/m) is exceeded, and a detailed analysis when the second decision level (>2.8 V/m) is also exceeded. Measurement protocol for assessment of public sites In Europe...

Example: ANFR In-Situ Measurement Process Broad band measurement Selective measurement Particular case study Measurement protocol for assessment of public sites

Limitation of in-Situ Protocol: These measurement are limited in time… Limitation of in-Situ Protocol …and space Monitoring solution using INSITE Box Mobile solution using EME Spy

Example of site analysis using several RF Safety tools Site overview: Emitting antenna Public Area

Fixed monitoring using INSITE Box : Mobile monitoring using EME Spy : Example of site analysis using several RF Safety tools In-Situ measurement using INSITE Free :

Mean : 1,49 V/m Maximum : 1,88 V/m Minimum : 1,03 V/m Example of site analysis using several RF Safety tools Using INSITE Box:

Example of site analysis using several RF Safety tools Using EME Spy:

Channel 6 : f= MHz ; E=0,6 V/m Channel 37 : f=942,4 MHz ; E=0,9 V/m Channel 43 : f=943,6 MHz ; E=0,2 V/m Total field=1,1 V/m Extr. Field=1,9 V/m Using INSITE Free: Example of site analysis using several RF Safety tools

END of The Presentation Thank You! Nairobi, Kenya, 26 – 27 July