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.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions 3.2 Symbols <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4 General Table 1 \u2013 Measurement method and frequency <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5 Measurement methods 5.1 Inductance method 5.1.1 Measurement parameters 5.1.2 Measurement frequency and accuracy Figures Figure 1 \u2013 In-plane and perpendicular measurement direction of NSS sample <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.1.3 Measurement principle Figure 2 \u2013 Toroidal-shaped sample cut from the NSS <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 3 \u2013 Test fixture with a toroidal-shaped NSS sample Figure 4 \u2013 Equivalent circuit model of the test fixture <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.1.4 Test sample 5.1.5 Test fixture 5.1.6 Measurement environment 5.1.7 Measurement uncertainty <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.1.8 Measurement system 5.1.9 Measurement procedure 5.1.10 Example of measurement results Figure 5 \u2013 Schematic diagram of measurement system <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.1.11 Remarks Figure 6 \u2013 Measurement results of NSS samples <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.2 Nicolson Ross Weir method 5.2.1 Principle Figure 7 \u2013 Schematic diagram of a test fixture with a sample and signal flow graph <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.2.2 Measurement frequency and accuracy 5.2.3 Measurement parameters 5.2.4 Test sample Figure 8 \u2013 Cross section of coaxial line with NSS <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.2.5 Measurement environment 5.2.6 Measurement uncertainly Figure 9 \u2013 Dimensions of test sample <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.2.7 Measurement system 5.2.8 Test fixture 5.2.9 Measurement procedure Figure 10 \u2013 Schematic diagram of equipment system for measurement Figure 11 \u2013 Specification for test fixture of a 7 mm coaxial transmission line <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.2.10 Example of measurement results 5.2.11 Remarks Figure 12 \u2013 Measurement results of noise suppression sheet <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 5.3 Short-circuited microstrip line method 5.3.1 Principle <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.3.2 Measurement frequency and accuracy 5.3.3 Measurement parameters 5.3.4 Test sample Figure 13 \u2013 Equivalent circuits for the MSL <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.3.5 Measurement environment 5.3.6 Measurement system 5.3.7 Test fixture (MSL jig) Figure 14 \u2013 Rectangular shape of NSS sample Figure 15 \u2013 Measurement system <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.3.8 Measurement procedure 5.3.9 Results (example) Figure 16 \u2013 Short-circuited microstrip line test fixture (MSL jig) <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.3.10 Remarks 5.4 Short-circuited coaxial line method 5.4.1 Principle Figure 17 \u2013 Complex relative permeability of a NSS sample C with 0,236 mm thickness, as measured at N = 0 (and \u03b7 = 0,135 2) and corrected by demagnetization factor N = 0,037 (and \u03b7 = 0,135 2) <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 5.4.2 Measurement frequency and accuracy Figure 18 \u2013 Equivalent circuits for the coax jig <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 5.4.3 Measurement parameters 5.4.4 Test sample 5.4.5 Measurement environments 5.4.6 Measurement system Figure 19 \u2013 Toroidal shape of NSS sample <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.4.7 Test fixture (coax jig) 5.4.8 Measurement procedure Figure 20 \u2013 Measurement system Figure 21 \u2013 Short-circuited coaxial line test fixture (coax jig) <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 5.4.9 Results (example) Figure 22 \u2013 Complex relative permeability of a NSS sample A with 0,29 mm thickness, as measured and corrected by the permittivity <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 5.4.10 Remarks 5.5 Shielded loop coil method 5.5.1 Measurement principle Figure 23 \u2013 Complex relative permeability of a NSS sample B with 0,25 mm thickness, as measured and corrected by the effective permittivity <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure 24 \u2013 Structure of shielded loop coil Figure 25 \u2013 Shielded loop coil and NSS sample arrangement <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure 26 \u2013 Whole structure of the measuring unit of the equipment <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 5.5.2 Measurement frequency and accuracy Figure 27 \u2013 DC magnetization curve Figure 28 \u2013 Estimation of absolute value correction coefficient M\u2019s <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 5.5.3 Measurement parameters 5.5.4 NSS sample dimension and recommendation Figure 29 \u2013 Recommended shape of NSS sample <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 5.5.5 Measurement environment 5.5.6 Measurement system 5.5.7 Measurement procedure Figure 30 \u2013 Block diagram of measurement system <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 5.5.8 Measurement results <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Figure 31 \u2013 Measured complex relative permeability asa function of the size of a NSS sheet (Sample A-01) Table 2 \u2013 Measurement sample table <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure 32 \u2013 Measured complex relative permeability asa function of the size of a NSS sheet (Sample B-01) Figure 33 \u2013 Measured complex relative permeability of a NSS sheetas a function of DC bias field intensity (Sample A-02) <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | 5.5.9 Summary Figure 34 \u2013 Measured complex relative permeabilityafter absolute value calibration (Sample A-01) Figure 35 \u2013 Measured complex relative permeabilityafter absolute value calibration (Sample B-01) <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | 5.6 Harmonic resonance cavity perturbation method 5.6.1 Theory <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 5.6.2 Permeability evaluation <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Figure 36 \u2013 Electromagnetic flux to evaluate permeabilityin the harmonic resonance cavity resonator Figure 37 \u2013 Example of the resonance characteristics change <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Figure 38 \u2013 Cavity resonator for 3,6 GHz to 7,2 GHz Figure 39 \u2013 Cavity resonator for 0,25 GHz to 2 GHz <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Figure 40 \u2013 Examples of resonance frequencies Figure 41 \u2013 Example of the resonance curves of a harmonic resonance cavity <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Figure 42 \u2013 Examples of samples Figure 43 \u2013 Measuring system <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Figure 44 \u2013 Sample installation in the cavity for the permeability measurement <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 5.6.3 Permittivity evaluation Figure 45 \u2013 Measured results of the permeability for Sample A and B and a copper rod Figure 46 \u2013 Electromagnetic flux to evaluate permittivityin the harmonic resonance cavity resonator <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Figure 47 \u2013 Sample installation in the cavity for the permittivity measurement <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Figure 48 \u2013 Adjustment procedure and adjusted results <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Figure 49 \u2013 Measured results of the permittivity for the two samples, A and B <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Annex A (informative)Derivation of the complex relative permeability of the inductance method <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | Annex B (informative)Short-circuited microstrip line method B.1 Fundamental calculation <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | B.2 Determination of CS and GS <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | B.3 Determination of demagnetization factor N and coupling coefficient \u03b7 B.4 Analysis with the software to determine the \u03bcr Figure B.1 \u2013 Complex relative permeabilities of Sample C with 0,236 mm thickness for toroidal shape and rectangular shape corrected by N = 0,037 and \u03b7 = 0,135 2 <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | Figure B.2 \u2013 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 \u03b7 = 0,135 2 Figure B.3 \u2013 Complex relative permeabilities of Sample C with 0,236 mm thickness for rectangular shape corrected by \u03b7 = 0,225 3, 0,169 and 0,135 2 with N = 0,037 <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Annex C (informative)Short-circuited coaxial line method C.1 Fundamental calculation to determine \u03bcr <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | C.2 Open-circuited coaxial line <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Figure C.1 \u2013 Open-circuited coaxial line jig Figure C.2 \u2013 Equivalent circuits for the open-circuited coaxial line <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | C.3 Remarks on lumped element approximation Figure C.3 \u2013 Complex relative permittivity of NSS Sample A with 0,29 mm thickness,as measured and corrected by the permeability Figure C.4 \u2013 Complex relative permittivity of NSS Sample B with 0,25 mm thickness,as measured and corrected by the permeability <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | Figure C.5 \u2013 Dependence of phase shift \u03b2t on frequency <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Measurement methods of the complex relative permeability and permittivity of noise suppression sheet<\/b><\/p>\n |