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BSI PD IEC TR 63307:2020

BSI PD IEC TR 63307:2020

$215.11

Measurement methods of the complex relative permeability and permittivity of noise suppression sheet

Published By Publication Date Number of Pages
BSI 2020 78
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This document provides guidelines on the methods for measuring the frequency characteristics of permeability and permittivity in the frequency range of 1 MHz to 6 GHz for a noise suppression sheet for each electromagnetic noise countermeasure.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
8 FOREWORD
10 INTRODUCTION
11 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
12 4 General
Table 1 – Measurement method and frequency
13 5 Measurement methods
5.1 Inductance method
5.1.1 Measurement parameters
5.1.2 Measurement frequency and accuracy
Figures
Figure 1 – In-plane and perpendicular measurement direction of NSS sample
14 5.1.3 Measurement principle
Figure 2 – Toroidal-shaped sample cut from the NSS
15 Figure 3 – Test fixture with a toroidal-shaped NSS sample
Figure 4 – Equivalent circuit model of the test fixture
16 5.1.4 Test sample
5.1.5 Test fixture
5.1.6 Measurement environment
5.1.7 Measurement uncertainty
18 5.1.8 Measurement system
5.1.9 Measurement procedure
5.1.10 Example of measurement results
Figure 5 – Schematic diagram of measurement system
19 5.1.11 Remarks
Figure 6 – Measurement results of NSS samples
20 5.2 Nicolson Ross Weir method
5.2.1 Principle
Figure 7 – Schematic diagram of a test fixture with a sample and signal flow graph
22 5.2.2 Measurement frequency and accuracy
5.2.3 Measurement parameters
5.2.4 Test sample
Figure 8 – Cross section of coaxial line with NSS
23 5.2.5 Measurement environment
5.2.6 Measurement uncertainly
Figure 9 – Dimensions of test sample
24 5.2.7 Measurement system
5.2.8 Test fixture
5.2.9 Measurement procedure
Figure 10 – Schematic diagram of equipment system for measurement
Figure 11 – Specification for test fixture of a 7 mm coaxial transmission line
25 5.2.10 Example of measurement results
5.2.11 Remarks
Figure 12 – Measurement results of noise suppression sheet
26 5.3 Short-circuited microstrip line method
5.3.1 Principle
27 5.3.2 Measurement frequency and accuracy
5.3.3 Measurement parameters
5.3.4 Test sample
Figure 13 – Equivalent circuits for the MSL
28 5.3.5 Measurement environment
5.3.6 Measurement system
5.3.7 Test fixture (MSL jig)
Figure 14 – Rectangular shape of NSS sample
Figure 15 – Measurement system
29 5.3.8 Measurement procedure
5.3.9 Results (example)
Figure 16 – Short-circuited microstrip line test fixture (MSL jig)
30 5.3.10 Remarks
5.4 Short-circuited coaxial line method
5.4.1 Principle
Figure 17 – Complex relative permeability of a NSS sample C with 0,236 mm thickness, as measured at N = 0 (and η = 0,135 2) and corrected by demagnetization factor N = 0,037 (and η = 0,135 2)
31 5.4.2 Measurement frequency and accuracy
Figure 18 – Equivalent circuits for the coax jig
32 5.4.3 Measurement parameters
5.4.4 Test sample
5.4.5 Measurement environments
5.4.6 Measurement system
Figure 19 – Toroidal shape of NSS sample
33 5.4.7 Test fixture (coax jig)
5.4.8 Measurement procedure
Figure 20 – Measurement system
Figure 21 – Short-circuited coaxial line test fixture (coax jig)
34 5.4.9 Results (example)
Figure 22 – Complex relative permeability of a NSS sample A with 0,29 mm thickness, as measured and corrected by the permittivity
35 5.4.10 Remarks
5.5 Shielded loop coil method
5.5.1 Measurement principle
Figure 23 – Complex relative permeability of a NSS sample B with 0,25 mm thickness, as measured and corrected by the effective permittivity
36 Figure 24 – Structure of shielded loop coil
Figure 25 – Shielded loop coil and NSS sample arrangement
37 Figure 26 – Whole structure of the measuring unit of the equipment
40 5.5.2 Measurement frequency and accuracy
Figure 27 – DC magnetization curve
Figure 28 – Estimation of absolute value correction coefficient M’s
41 5.5.3 Measurement parameters
5.5.4 NSS sample dimension and recommendation
Figure 29 – Recommended shape of NSS sample
42 5.5.5 Measurement environment
5.5.6 Measurement system
5.5.7 Measurement procedure
Figure 30 – Block diagram of measurement system
43 5.5.8 Measurement results
44 Figure 31 – Measured complex relative permeability asa function of the size of a NSS sheet (Sample A-01)
Table 2 – Measurement sample table
45 Figure 32 – Measured complex relative permeability asa function of the size of a NSS sheet (Sample B-01)
Figure 33 – Measured complex relative permeability of a NSS sheetas a function of DC bias field intensity (Sample A-02)
46 5.5.9 Summary
Figure 34 – Measured complex relative permeabilityafter absolute value calibration (Sample A-01)
Figure 35 – Measured complex relative permeabilityafter absolute value calibration (Sample B-01)
47 5.6 Harmonic resonance cavity perturbation method
5.6.1 Theory
48 5.6.2 Permeability evaluation
49 Figure 36 – Electromagnetic flux to evaluate permeabilityin the harmonic resonance cavity resonator
Figure 37 – Example of the resonance characteristics change
50 Figure 38 – Cavity resonator for 3,6 GHz to 7,2 GHz
Figure 39 – Cavity resonator for 0,25 GHz to 2 GHz
51 Figure 40 – Examples of resonance frequencies
Figure 41 – Example of the resonance curves of a harmonic resonance cavity
52 Figure 42 – Examples of samples
Figure 43 – Measuring system
53 Figure 44 – Sample installation in the cavity for the permeability measurement
55 5.6.3 Permittivity evaluation
Figure 45 – Measured results of the permeability for Sample A and B and a copper rod
Figure 46 – Electromagnetic flux to evaluate permittivityin the harmonic resonance cavity resonator
57 Figure 47 – Sample installation in the cavity for the permittivity measurement
58 Figure 48 – Adjustment procedure and adjusted results
60 Figure 49 – Measured results of the permittivity for the two samples, A and B
61 Annex A (informative)Derivation of the complex relative permeability of the inductance method
63 Annex B (informative)Short-circuited microstrip line method
B.1 Fundamental calculation
64 B.2 Determination of CS and GS
66 B.3 Determination of demagnetization factor N and coupling coefficient η
B.4 Analysis with the software to determine the μr
Figure B.1 – Complex relative permeabilities of Sample C with 0,236 mm thickness for toroidal shape and rectangular shape corrected by N = 0,037 and η = 0,135 2
67 Figure B.2 – Complex relative permeabilities of Sample C with 0,236 mm thickness for rectangular shape corrected by N = 0, 0,018 5 and 0,037 with η = 0,135 2
Figure B.3 – Complex relative permeabilities of Sample C with 0,236 mm thickness for rectangular shape corrected by η = 0,225 3, 0,169 and 0,135 2 with N = 0,037
68 Annex C (informative)Short-circuited coaxial line method
C.1 Fundamental calculation to determine μr
69 C.2 Open-circuited coaxial line
70 Figure C.1 – Open-circuited coaxial line jig
Figure C.2 – Equivalent circuits for the open-circuited coaxial line
73 C.3 Remarks on lumped element approximation
Figure C.3 – Complex relative permittivity of NSS Sample A with 0,29 mm thickness,as measured and corrected by the permeability
Figure C.4 – Complex relative permittivity of NSS Sample B with 0,25 mm thickness,as measured and corrected by the permeability
74 Figure C.5 – Dependence of phase shift βt on frequency
75 Bibliography

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BSI PD IEC TR 63307:2020
$215.11