BS EN IEC/IEEE 63195-2:2023
$215.11
Assessment of power density of human exposure to radio frequency fields from wireless devices in close proximity to the head and body (frequency range of 6 GHz to 300 GHz) – Computational procedure
| Published By | Publication Date | Number of Pages |
| BSI | 2023 | 82 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications |
| 6 | Blank Page |
| 7 | English CONTENTS |
| 11 | FOREWORD |
| 13 | INTRODUCTION |
| 14 | 1 Scope 2 Normative references |
| 15 | 3 Terms and definitions 3.1 Exposure metrics and parameters |
| 16 | 3.2 Spatial, physical, and geometrical parameters associated with exposure metrics |
| 18 | 3.3 Test device technical operating and antenna parameters 3.4 Computational parameters |
| 19 | 3.5 Uncertainty parameters 4 Symbols and abbreviated terms 4.1 Symbols 4.1.1 Physical quantities |
| 20 | 4.1.2 Constants 4.2 Abbreviated terms |
| 21 | 5 Overview and application of this document 5.1 Overview of the numerical evaluation |
| 22 | 5.2 Application of this document Figures Figure 1 – Overview of the numerical power density evaluation procedure |
| 23 | 5.3 Stipulations 6 Requirements on the numerical software |
| 24 | 7 Model development and validation 7.1 General 7.2 Development of the numerical model of the DUT |
| 25 | 7.3 Power normalization |
| 27 | 7.4 Requirements on the experimental test equipment for model validation 7.4.1 General Figure 2 – Power reference planes |
| 28 | 7.4.2 Ambient conditions and device holder 7.4.3 Power measurement |
| 29 | 7.5 Testing configurations for the validation of the DUT model 7.5.1 General 7.5.2 Tests to be performed |
| 30 | 7.5.3 Determining the validity of the DUT model 7.5.4 Test reduction for additional DUTs |
| 31 | 8 Power density computation and averaging 8.1 Evaluation surface 8.2 Tests to be performed and DUT configurations 8.2.1 General |
| 32 | 8.2.2 Devices with a single radiating element or with multiple elements that do not operate simultaneously 8.2.3 Devices with antenna arrays or sub-arrays Figure 3 – Example for configurations of radiating elementsas different antenna sub-arrays on the same DUT |
| 33 | 8.2.4 Devices with multiple antennas or multiple transmitters Figure 4 – Flow chart for the evaluation of power density forDUTs with antenna arrays or sub-arrays as described in 8.2.3 |
| 34 | 8.3 Considerations on the evaluation surface and dimensions of the computational domain 8.4 Averaging of power density on an evaluation surface 8.4.1 General |
| 35 | 8.4.2 Construction of the averaging area on an evaluation surface |
| 36 | 8.5 Computation of sPD by integration of the Poynting vector 8.5.1 General 8.5.2 Surface-normal propagation-direction power density into the evaluation surface, sPDn+ Figure 5 – Example of the construction of the averaging area withina sphere with fixed radius according to 8.4 |
| 37 | 8.5.3 Total propagating power density into the evaluation surface, sPDtot+ 8.5.4 Total power density directed into the phantom considering near-field exposure, sPDmod+ |
| 38 | 8.6 Software 9 Uncertainty evaluation 9.1 General 9.2 Uncertainty of the sPD and of the mpsPD due to the computational parameters 9.2.1 Uncertainty contributions due to the computational parameters |
| 39 | 9.2.2 Mesh resolution Tables Table 1 – Budget of the uncertainty contributions ofthe computational algorithm for the validation setup or testing setup |
| 40 | 9.2.3 Absorbing boundary conditions 9.2.4 Power budget 9.2.5 Model truncation 9.2.6 Convergence |
| 41 | 9.2.7 Dielectric properties 9.2.8 Lossy conductors 9.3 Uncertainty contribution of the computational representation of the DUT model |
| 42 | 9.4 Uncertainty of the maximum exposure evaluation Table 2 – Budget of the uncertainty of the developed model of the DUT |
| 43 | 9.5 Uncertainty budget Table 3 – Computational uncertainty budget |
| 44 | 10 Reporting |
| 46 | Annex A (normative)Code verification A.1 General A.2 Interpolation and superposition of vector field components |
| 47 | Figure A.1 – Configuration of three λ/2 dipoles, D1, D2, and D3, for the evaluation of the interpolation and superposition of the electric field and magnetic field components Table A.1 – Interpolation and superposition of vector field components; maximum permissible deviation from the reference results is 10 % |
| 48 | A.3 Computation of the far-field pattern and the radiated power A.4 Implementation of lossy conductors Table A.2 – Computation of PR; maximum permissible deviation fromthe reference results is 10 % for the radiated power and for the electric field amplitude of the far-field pattern |
| 50 | Figure A.2 – R320 waveguide |
| 51 | A.5 Implementation of anisotropic dielectrics Figure A.3 – Cross section of the R320 waveguide showingthe locations of the Ey components to be recorded Table A.3 – Minimum fine and coarse mesh step for used method Table A.4 – Results of the evaluation of the computational dispersion characteristics |
| 52 | A.6 Computation of the sPD and psPD A.6.1 General Table A.5 – Results of the evaluation of the representation of anisotropic dielectrics |
| 53 | Table A.6 – Parameters for the incident power density distribution of Formula (A.4) |
| 54 | A.6.2 Planar surfaces Figure A.4 – Si(x,y) computed with Formula (A.4) for the six parametersets of Table A.6 normalized to their maxima |
| 55 | A.6.3 Non-planar surfaces |
| 56 | Figure A.5 – Cross sections of the symmetric quarters of the testing geometries (SAR Stars) for the benchmarking of the power density averaging algorithm Figure A.6 – Areas for the computation of the sPD on a cone of the SAR Star |
| 57 | A.7 Implementation of the field extrapolation according to the surface equivalence principle |
| 58 | Annex B (informative)Experimental evaluation of the radiated power B.1 General B.2 Direct conducted power measurements Table B.1 – Comparison of the experimental methodsfor the evaluation of the radiated power |
| 59 | B.3 Radiated power measurement methods B.4 Information provided by the DUT |
| 60 | Annex C (normative)Maximum-exposure evaluation techniques C.1 General C.2 Evaluation of EM fields radiated by each antenna element |
| 61 | C.3 Evaluation of the mpsPD by superposition of individual EM fields C.3.1 General C.3.2 Maximization over the entire codebook by exhaustive search C.3.3 Optimization with fixed total conducted power C.3.4 Optimization with fixed power at each port |
| 63 | Annex D (informative)Examples of the implementation of power density averaging algorithms D.1 Example for the evaluation of the psPD on a planar surface D.1.1 General D.1.2 Evaluation of the psPD by direct construction of the averaging area |
| 64 | D.1.3 Example for the efficient evaluation of the psPD using an equidistant mesh on the evaluation surface |
| 65 | D.2 Example for the evaluation of the psPD on a non-planar surface Figure D.1 – Rotated averaging area on the discretized evaluation surface (base mesh) |
| 66 | Figure D.2 – Reduction of the area of triangles thatare partially included in the averaging sphere |
| 67 | Annex E (informative)File format for exchange of field data |
| 69 | Annex F (informative)Rationales of the methods applied inIEC/IEEE 63195-1 and this document F.1 Frequency range F.2 Computation of sPD F.2.1 Application of the Poynting vector for computation of incident power density |
| 70 | F.2.2 Averaging area |
| 71 | Annex G (informative)Square averaging area on non-planar evaluation surfaces G.1 General G.2 Example implementation for the evaluation of the psPD on a non-planar surface using square-shaped averaging area |
| 72 | Annex H (informative)Validation of the maximum-exposure evaluation techniques H.1 General H.2 Validation of the exhaustive search H.2.1 Validation of the exhaustive search H.2.2 Validation using reconstruction method H.2.3 Validation of optimization with fixed total conducted power or with fixed power at each port H.2.4 Validation of the maximum-exposure evaluation of measurement results |
| 73 | H.3 Example validation source for maximum-exposure evaluation validation H.3.1 Description Table H.1 – Main dimensions for the patch array stencil Table H.2 – Main dimensions of the validation device |
| 74 | Figure H.1 – Main dimensions of patch array stencil |
| 75 | H.3.2 Positioning Figure H.2 – Main dimensions of the validation device, including polypropylene casing Figure H.3 – Validation device with SAM head in the tilt position |
| 76 | H.3.3 Nominal codebook, uncertainty and conducted power PR H.3.4 Target values Figure H.4 – Validation device with SAM head in the touch position |
| 77 | Table H.3 – Target values for validation device with the nominal codebook Table H.4 – Target values for validation device with infinite codebook |
| 78 | Annex I (normative)Supplemental files and their checksums |
| 79 | Bibliography |
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