BS IEC 62153-4-16:2016
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Metallic communication cable test methods – Electromagnetic compatibility (EMC). Extension of the frequency range to higher frequencies for transfer impedance and to lower frequencies for screening attenuation measurements using the triaxial set-up
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 22 |
This part of IEC 62153 describes a method to extrapolate the test results of transfer impedance to higher frequencies and the test results of screening attenuation to lower frequencies when measured with the triaxial set-up according to IEC 62153-4-3 (method B) respectively IEC 62153-4-4. A similar approach to extrapolate the test results of transfer impedance to higher frequencies was already described in IEC 61196-1:1995 Subclause 12.2. This method is applicable for homogenous screens, i.e. screens having a transfer impedance directly proportional to length. The transfer impedance may have any frequency behaviour, i.e. it could have a behaviour where it does not increase with 20 dB per decade as observed for screens made of a foil and a braid.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 5 | FOREWORD |
| 7 | 1 Scope 2 Normative references 3 Acronyms |
| 8 | 4 Overview Figures Figure 1 – Simulation of the scattering parameter S21 (left hand scale) and the transfer impedance (right hand scale) for a single braid screen |
| 9 | 5 Frequency behaviour of the triaxial set-up |
| 11 | 6 Extrapolation of measurement results Figure 2 – Magnitude of the frequency behaviour (F) in logarithmic frequency scale for a coupling length of 0,5 m, respectively 2 m and relative dielectric permittivity of 2,3 and 1,1 for the inner, respectively outer circuit Figure 3 – Magnitude of the frequency behaviour (F) in linear frequency scale for a coupling length of 0,5 m, respectively 2 m and relative dielectric permittivity of 2,3 and 1,1 for the inner, respectively outer circuit |
| 12 | Figure 4 – Example for the extrapolation of the transfer impedance of a RG59 type cable measured with a coupling length of 2 m and assuming relative dielectric permittivity of 2,3 and 1,1 for the inner, respectively outer circuit |
| 13 | Figure 5 – Example for the extrapolation of the scattering parameter S21 in logarithmic frequency scale of a RG59 type cable measured with a coupling length of 0,5 m and assuming dielectric permittivities of 2,3 and 1,1 for the inner, respectively outer circuit |
| 14 | 7 Determination of the relative dielectric permittivity and impedance 7.1 General Figure 6 – Example for the extrapolation of the scattering parameter S21 in linear frequency scale of a RG59 type cable measured with a coupling length of 0,5 m and assuming dielectric permittivities of 2,3 and 1,1 for the inner, respectively outer circuit |
| 16 | Figure 7 – Measurement of S11 of the outer circuit (tube) having a length of 50 cm |
| 17 | 7.2 Influence of the test head Figure 8 – Example of test head (COMET set-up) |
| 18 | Figure 9 – Example on how to obtain the electrical length of the test head from the S11 measurement using a bare copper wire as DUT (COMET set-up) |
| 19 | Figure 10 – Example for an RG58 type cable in 2 m triaxial set-up (COMET) |
| 20 | Bibliography |
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IEC 62153-4-16:2016
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