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BS EN 55016-1-5:2015+A1:2017:2018 Edition

BS EN 55016-1-5:2015+A1:2017:2018 Edition

$215.11

Amendment 1. Specification for radio disturbance and immunity measuring apparatus and methods. – Part 1-5: Radio disturbance and immunity measuring apparatus. Antenna calibration sites and reference test sites for 5 MHz to 18 GHz

Published By Publication Date Number of Pages
BSI 2018 102
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PDF Catalog

PDF Pages PDF Title
2 undefined
9 2 Normative references
5.4 Validation of a FAR for antenna radiation pattern measurements above 1 GHz
10 English
CONTENTS
14 FOREWORD
16 INTRODUCTION
17 Tables
Table 1 – Summary of site validation methods by subclause number
18 1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
19 3.1.1 Antenna terms
21 3.1.2 Measurement site terms
22 3.1.3 Other terms
23 3.2 Abbreviations
24 4 Specifications and validation procedures for CALTS and REFTS from 5 MHz to 1 000 MHz
4.1 General
4.2 Antenna calibration test site (CALTS) specification
4.2.1 General
25 4.2.2 Normative specification
4.3 Test antenna specification
4.3.1 General
26 4.3.2 Details of the required characteristics of the test antenna
Figures
Figure 1 – Schematic diagram of the test antenna
Table 2 – Maximum tolerances for d = 10 m
27 Figure 2 – Adjustment of a telescopic wire element to the length Lwe
28 4.4 Antenna calibration test site validation procedure
4.4.1 General
4.4.2 Test set-up
30 4.4.3 Test frequencies and receive antenna heights
4.4.4 SIL measurements
Table 3 – Frequency and fixed receive antenna height data for SIL measurementsat 24 frequencies, with ht = 2 m and d = 10 m (specified in 4.4.2.3 and 4.4.2.4)
31 Figure 3 – Determination of Vr1(f) or Vr2(f)
Figure 4 – Determination of Vs(f) with the wire antennas in their specified positions
33 4.4.5 Swept frequency SIL measurements
Table 4 – RSM frequency steps
34 Figure 5 – Example NSIL: horizontal polarization, antenna height 2 m, separation 10 m
Table 5 (informative) – Antenna heights for SIL measurements
35 Figure 6 – NSIL of the four pairs of calculable dipoles at 10 m separation and using the alternative heights for the 600 MHz to 1 000 MHzpair according to Table 5
36 4.4.6 Identifying and reducing reflections from antenna supports
4.5 Antenna calibration test site acceptance criteria
4.5.1 General
4.5.2 Measurement uncertainties
37 4.5.3 Acceptance criteria
Figure 7 – Relation between the quantities used in the SIL acceptance criterion
38 4.6 Calibration site with a metal ground plane for biconical antennas and tuned dipole antennas over the frequency range 30 MHz to 300 MHz
39 4.7 Validation of a REFTS
4.7.1 General
4.7.2 Validation for horizontal polarization
4.7.3 Validation for vertical polarization
Table 6 – Antenna set-up for the SIL measurement of the calibration site using horizontally polarized resonant dipole antennas(see also 4.4.4 for SIL at 250 MHz and 300 MHz)
40 Table 7 – Antenna heights
41 4.8 Validation report for CALTS and REFTS
4.8.1 General
4.8.2 Validation report requirements
42 4.9 Site validation for the calibration of biconical and dipole antennas, and the biconical part of hybrid antennas in vertical polarization
43 4.10 Validation of a CALTS using vertical polarization from 5 MHz to 30 MHz for the calibration of monopole antennas
4.10.1 General
44 4.10.2 Uncertainty evaluation
5 Validation methods for a FAR from 30 MHz to 18 GHz
5.1 General
Table 8 – Example measurement uncertainty budget for SIL between two monopole antennas
45 5.2 Validation procedure from 1 GHz to 18 GHz
5.2.1 Power transfer between two antennas
5.2.2 Measurement procedure for validation from 1 GHz to 18 GHz
46 Figure 8 – Set-up of site validation for EMC antenna calibrations above 1 GHz in a FAR, also showing distance between antenna phase centres
47 5.2.3 Analysis of results
48 5.2.4 Acceptance criterion
Figure 9 – Example plots of [Ai m(d) ( Ai m(d3 m)] in dB against distance in m at 1 GHz to 18 GHz in 1 GHz steps, corrected for LPDA and horn phase centres
49 5.2.5 Chamber performance versus polarization
5.2.6 Uncertainty
Table 9 – Example measurement uncertainty budget for FAR validation method at and above 1 GHz
50 5.3 Validation of a FAR for the calibration of antennas by alternative methods
5.3.1 General
5.3.2 Validation of a FAR from 30 MHz to 1 GHz
5.3.3 Alternative validation of a FAR for the calibration of LPDA antennas above 1 GHz
51 5.3.4 Alternative validation of a FAR applying time-domain measurements above 500 MHz
6 Validation methods for sites used for the calibration of directive antennas
6.1 Validation of the calibration site minimizing ground reflection by a height ≥ 4 m
6.1.1 Measurement procedure
52 Figure 10 – Example of antenna set-up for an LPDA antenna calibration in the frequency range above 200 MHz
53 6.1.2 Uncertainties
Figure 11 – Example of SIL versus antenna height measured at 200 MHz withtwo LPDA antennas in vertical polarization at 2,5 m distance between their midpoints above the reflecting ground plane of an OATS
Figure 12 – Illustration of distances of transmit horn to omni-directional receive antenna and reflective building, and transmitted signal paths A and B
54 6.2 Validation of the calibration site minimizing ground reflection by use of absorber
Table 10 – Example measurement uncertainty budget forthe site validation method in 6.1.1
55 7 Site validation by comparison of antenna factors, and application of RSM to evaluate the uncertainty contribution of a SAC site
7.1 Use of SAM for site validation by comparison of antenna factors
56 7.2 Application of RSM to evaluate the measurement uncertainty contribution of a calibration site comprising a SAC
57 Table 11 – Maximum tolerances for validation set-up at d = 10 m
58 Annex A (informative) CALTS characteristics and validation
A.1 General
A.2 The reflecting plane
A.2.1 Reflecting plane construction
59 A.2.2 Plane-edge effects and plane surroundings
A.3 Ancillary equipment
Table A.1 – Example of fixed-length calculable dipole antennasand their subdivision of the frequency range 30 MHz to 1 000 MHz
60 A.4 Additional stringent CALTS validation testing
A.4.1 General
A.4.2 Antenna-height scan measurements
61 A.4.3 Frequency scan measurements
62 Table A.2 – Receive antenna heights and centre frequencies
64 Annex B (informative) Test antenna considerations
B.1 General
B.2 Example and verification of a test antenna
66 B.3 Determination of balun properties
B.3.1 The ideal lossless balun
Figure B.1 – Example of a test antenna
67 B.3.2 Relations between balun properties and Sparameters
Figure B.2 – Diagram of the measurement of S11 and S12, and of S22 and S21, when generator and load are interchanged
68 B.3.3 Insertion loss measurements
69 Figure B.3 – Schematic diagram for determination of the insertion loss A1(f)
Figure B.4 – Schematic diagram for determination of the insertion loss A2(f)
71 Annex C (informative) Antenna and SIL theory
C.1 Analytical relations
C.1.1 General
72 C.1.2 Total length of the test antenna
73 C.1.3 Theoretical SIL
74 Figure C.1 – Network model for Ai c calculations
Figure C.2 – Equivalent circuit to the network in Figure C.1
75 Figure C.3 – Definition of the mutual couplings, feed-terminal voltages and antenna currents of the antennas above the reflecting plane and their images
77 C.1.4 Calculation example
Table C.1 – Example numerical (analytical) calculation of La, Ai c (see C.1.4.2)
79 Table C.2 – Example numerical (analytical) calculation of ∆At (see C.1.4.3)
80 C.2 Computations by the MoM
C.2.1 General
Table C.3 – Example numerical (analytical) calculation of hrc and Δft
Table C.4 – Example numerical (analytical) calculation of fc and Δft
81 C.2.2 Antenna input impedance
C.2.3 Total length of the test antenna
C.2.4 SIL computations
82 Figure C.4 – Cascade combination of the baluns and the site twoport network
83 Figure C.5 – Flow chart showing how SIL is obtained by combining the measured balun Sparameters and the NEC calculated Sparameters of the site two-port network
86 Table C.5 – MoM example calculation of Ai c for vertical polarization,ht = 2 m, except ht = 2,75 m at 30 MHz, 35 MHz and 40 MHz
88 C.2.5 Antenna factor (AF) computations
92 Annex D (informative) Pascal Program used in C.1.4
96 Annex E (informative) Validation procedure checklist
98 Annex F (informative) Evidence that field taper of VP site validation methodh as negligible effect on measured antenna factor
F.1 Investigation of vertical field taper
F.2 Calibration of biconical antennas using vertical polarization
Figure F.1 – Field uniformity with height step 1 m to 2,6 m, normalized to field at 1,8 m height; monocone at 15 m range
99 Figure F.2 – Averaging of height steps, SAM, B.4.2 in CISPR 16-1-6:2014
100 Bibliography

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BS EN 55016-1-5:2015+A1:2017
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