Determination of RF field strength and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure

Determination of RF field strength and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure

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1   Scope

This International Standard provides methods for the determination of radio-frequency (RF) field strength and specific absorption rate (SAR) in the vicinity of radiocommunication base stations (RBS) for the purpose of evaluating human exposure.
This standard:
  1. a) considers RBS which transmit on one or more antennas using one or more frequencies in the range 300 MHz to 6 GHz;
  2. b) describes several RF field strength and SAR measurement and computation methodologies with guidance on their applicability to address both the in situevaluation of installed RBS and laboratory-based evaluations;
  3. c) describes how surveyors with a sufficient level of expertise shall establish their specific evaluation procedures appropriate for their evaluation purpose;
  4. d) considers the evaluation purposes, namely:
    1. 1) product conformity: to establish that a RBS conforms to a defined set of limit conditions under its intended use;
    2. 2) compliance boundary: to establish the compliance boundary or boundaries for a RBS in relation to a defined set of limit conditions;
    3. 3) to evaluate RF field strength or SAR values at one or more evaluation locations, namely:
      1. i) evaluation location(s) at arbitrary locations outside the control boundary to provide information for interested parties;
      2. ii) evaluation location(s) at the control boundary to confirm validity of control boundary;
      3. iii) evaluation location(s) within the control boundary with the specific conditions relevant to investigate an alleged over-exposure incident;
  5. e) provides guidance on how to report, interpret and compare results from different evaluation methodologies and, where the evaluation purpose requires it, determine a justified decision against a limit value;
  6. f) provides informative guidance on how to evaluate ambient RF field strength levels in the vicinity of a RBS from RF sources other than the RBS under evaluation and at frequencies within and outside the range 300 MHz to 6 GHz;
  7. g) provides short descriptions of the informative example case studies to aid the surveyor given in the companion Technical Report IEC 62669 [54].