BS EN 62209-2:2010+A1:2019
$215.11
Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices. Human models, instrumentation, and procedures – 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)
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 122 |
This part of IEC 62209 series is applicable to any wireless communication device capable of transmitting electromagnetic fields (EMF) intended to be used at a position near the human body, in the manner described by the manufacturer, with the radiating part(s) of the device at distances up to and including 200 mm from a human body, i.e. when held in the hand or in front of the face, mounted on the body, combined with other transmitting or non-transmitting devices or accessories (e.g. belt-clip, camera or Bluetooth add-on), or embedded in garments. For transmitters used in close proximity to the human ear, the procedures of IEC 62209-1:2005 are applicable. This standard is applicable for radio frequency exposure in the frequency range of 30 MHz to 6 GHz, and may be used to measure simultaneous exposures from multiple radio sources used in close proximity to human body. Definitions and evaluation procedures are provided for the following general categories of device types: body-mounted, body-supported, desktop, front-of-face, hand-held, laptop, limb-mounted, multi-band, push-to-talk, clothing-integrated. The types of devices considered include but are not limited to mobile telephones, cordless microphones, auxiliary broadcast devices and radio transmitters in personal computers. This International Standard gives guidelines for a reproducible and conservative measurement methodology for determining the compliance of wireless devices with the SAR limits. Because studies suggest that exclusion of features to represent a hand in human models constitutes a conservative case scenario for SAR in the trunk and the head, a representation of a hand is not included if the device is intended to be used next to the head or supported on or near the torso [73], [80]. This standard does not apply for exposures from transmitting or non-transmitting implanted medical devices. This standard does not apply for exposure from devices at distances greater than 200 mm away from the human body. IEC 62209-2 makes cross-reference to IEC 62209-1:2005 where complete clauses or subclauses apply, along with any changes specified.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | CONTENTS |
| 10 | FOREWORD |
| 12 | INTRODUCTION |
| 13 | 1 Scope 2 Normative references |
| 14 | 3 Terms and definitions |
| 17 | 4 Symbols and abbreviated terms 4.1 Physical quantities 4.2 Constants 4.3 Abbreviations |
| 18 | 5 Measurement system specifications 5.1 General requirements |
| 19 | 5.2 Phantom specifications – shell and liquid 5.2.1 General requirements 5.2.2 Phantom material, shape and size |
| 20 | 5.2.3 Tissue-equivalent liquid material properties Figures Figure 1 – Dimensions of the elliptical phantom |
| 21 | Tables Table 1 – Dielectric properties of the tissue-equivalent liquid material |
| 22 | 5.3 Measurement instrumentation system specifications 5.3.1 General requirements 5.3.2 Scanning system 5.3.3 Probes 5.3.4 Probe calibration 5.3.5 Specifications for fixture(s) to hold the DUT in the test position |
| 23 | 6 Protocol for SAR evaluation 6.1 Measurement preparation 6.1.1 General preparation 6.1.2 System check 6.1.3 Preparation of the device under test |
| 25 | 6.1.4 Position of the device under test in relation to the phantom |
| 26 | Figure 2 – Definition of reference points |
| 27 | Figure 3 – Measurements by shifting of the device at the phantom |
| 28 | Figure 4 – Test positions for a generic device |
| 29 | Figure 5 – Test positions for body-worn devices Figure 6 – Device with swivel antenna (example of desktop device) |
| 31 | Figure 7 – Test positions for body supported devices |
| 32 | Figure 8 – Test positions for desktop devices |
| 33 | Figure 9 – Test positions for front-of-face devices |
| 34 | Figure 10 – Test position for limb-worn devices |
| 35 | 6.1.5 Test frequencies 6.2 Tests to be performed 6.2.1 General requirements 6.2.2 Test reductions Figure 11 – Test position for clothing-integrated wireless devices |
| 36 | 6.2.3 General test procedure |
| 37 | 6.2.4 Fast SAR evaluations |
| 38 | Figure 12 – Block diagram of the tests to be performed |
| 39 | 6.3 Measurement procedure 6.3.1 General procedure |
| 40 | Figure 14 – Orientation of the probe with respect to the line normal to the phantom surface, shown at two different locations |
| 41 | Table 8 – Zoom scan parameters |
| 42 | 6.3.2 Procedures for testing of DUTs with simultaneous multi-band transmission Figure 13 – Orientation of the probe with respect to the normal of the phantom surface |
| 44 | 6.4 Post-processing 6.4.1 Interpolation 6.4.2 Probe offset extrapolation 6.4.3 Definition of averaging volume 6.4.4 Searching for the maxima |
| 45 | 7 Uncertainty estimation 7.1 General considerations 7.1.1 Concept of uncertainty estimation 7.1.2 Type A and type B evaluations |
| 46 | 7.1.3 Degrees of freedom and coverage factor 7.2 Components contributing to uncertainty 7.2.1 General 7.2.2 Contribution of the measurement system (probe and associated electronics) |
| 52 | 7.2.3 Contribution of mechanical constraints |
| 56 | 7.2.4 Contribution of physical parameters |
| 57 | Table 2 – Example uncertainty template and example numerical values for relative permittivity (ε′r ) and conductivity (σ) measurement; separate tables may be needed for each ε′r and σ |
| 59 | 7.2.5 Contribution of post-processing |
| 61 | Table 3 – Parameters for reference function f1 |
| 62 | Table 4 – Reference SAR values in watts per kilogram used for estimating post-processing uncertainties |
| 64 | 7.2.6 Standard source offset and tolerance 7.3 Uncertainty estimation 7.3.1 Combined and expanded uncertainties |
| 65 | 7.3.2 Maximum expanded uncertainty |
| 66 | Table 5 – Measurement uncertainty evaluation template for DUT SAR test |
| 68 | Table 6 – Measurement uncertainty evaluation template for system validation |
| 70 | Table 7 – Measurement uncertainty evaluation template for system repeatability |
| 71 | 8 Measurement report 8.1 General 8.2 Items to be recorded in the measurement report |
| 73 | Annexes Annex A (informative) Phantom rationale |
| 76 | Annex B (normative) SAR measurement system verification |
| 78 | Figure B.1 – Set-up for the system check |
| 83 | Table B.1 – Numerical reference SAR values for reference dipoles and flat phantom (All values are normalized to a forward power of 1 W |
| 84 | Table B.2 – Numerical reference SAR values for reference matched waveguides in contact with flat phantom (from reference [53]) |
| 85 | Annex C (informative) Fast SAR testing |
| 87 | Annex D (informative) Standard sources and phantoms for system validation |
| 88 | Table D.1 – Mechanical dimensions of the reference dipoles |
| 89 | Figure D.1 – Mechanical details of the reference dipole |
| 90 | Figure D.2 – Dimensions of the flat phantom set-up used for deriving the minimal dimensions for W and L |
| 91 | Figure D.3 – FDTD predicted uncertainty in the 10 g peak spatial-average SAR as a function of the dimensions of the flat phantom compared with an infinite flat phantom Table D.2 – Parameters used for calculation of reference SAR values in Table B.1 |
| 92 | Figure D.4 – Standard waveguide source Table D.3 – Mechanical dimensions of the standard waveguide |
| 93 | Annex E (informative) Example recipes for phantom tissue-equivalent liquids |
| 94 | Table E.1 – Suggested recipes for achieving target dielectric parameters |
| 96 | Annex F (normative) SAR correction for deviations of complex permittivity from targets |
| 97 | Table F.1 – Root-mean-squared error of Equations (F.1) to (F.3) as a function of the maximum change in permittivity or conductivity [13] |
| 98 | Annex G (informative) Hands-free kit testing Figure G.1 – Configuration of a wired personal hands-free headset |
| 99 | Figure G.2 – Configuration without a wired personal hands-free headset |
| 101 | Annex H (informative) Skin enhancement factor Figure H.1 – SAR and temperature increase (ΔT) distributions simulated for a three-layer (skin, fat, muscle) planar torso model |
| 102 | Figure H.2 –Statistical approach to protect 90 % of the population |
| 103 | Figure H.3 – Spatial-average SAR skin enhancement factors Table H.1 – Spatial-average SAR correction factors |
| 105 | Annex I (informative) Tissue-equivalent liquid dielectric property measurements and measurement uncertainty estimation Table I.1 – Parameters for calculating the dielectric properties of various reference liquids |
| 106 | Table I.2 – Dielectric properties of reference liquids at 20 °C |
| 107 | Annex J (informative) Testing compliance for the exposure of the hand Figure J.1 – Test position for hand-held devices, not used at the head or torso |
| 109 | Annex K (informative) Test reduction |
| 111 | Annex L (normative) Power scaling procedure |
| 113 | Annex M (informative) Rationale for probe parameters Table M.1 – Minimum probe requirements as a function of frequency and parameters of the tissue equivalent liquid |
| 114 | Table M.2 – Extrapolation and integration uncertainty of the 10 g peak spatial average SAR (k=2) for homogeneous and graded meshes |
| 115 | Bibliography |
Related products
-
UNE-EN 62209-2:2010/A1:2019
Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices – Human…
