BS IEC 62153-4-16-2016 Metallic communication cable test methods Electromagnetic compatibility (EMC) Extension of the frequency range to higher frequencies for transfer impedance an.pdf

1、Metallic communication cable test methodsPart 4-16: 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-upBS IEC 62153-4-16:2016BSI Standards Publicati

2、onWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of IEC 62153-4-16:2016. The UK participation in its preparation was entrusted to TechnicalCommittee EPL/46, Cables, wires and waveguides, radio frequency connectors and accessori

3、es for communication and signalling.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Instit

4、ution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 92709 6ICS 33.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2016.Amendments/co

5、rrigenda issued since publicationDate Text affectedBRITISH STANDARDBS IEC 62153-4-16:2016IEC 62153-4-16 Edition 1.0 2016-10 INTERNATIONAL STANDARD Metallic communication cable test methods Part 4-16: Electromagnetic compatibility (EMC) Extension of the frequency range to higher frequencies for trans

6、fer impedance and to lower frequencies for screening attenuation measurements using the triaxial set-up INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.120.10 ISBN 978-2-8322-3707-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publi

7、cation from an authorized distributor. colourinsideBS IEC 62153-4-16:2016 2 IEC 62153-4-16:2016 IEC 2016 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Acronyms 5 4 Overview . 6 5 Frequency behaviour of the triaxial set-up . 7 6 Extrapolation of measurement results 9 7 Determination of t

8、he relative dielectric permittivity and impedance 12 7.1 General . 12 7.2 Influence of the test head 15 Bibliography 18 Figure 1 Simulation of the scattering parameter S21(left hand scale) and the transfer impedance (right hand scale) for a single braid screen. 6 Figure 2 Magnitude of the frequency

9、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 9 Figure 3 Magnitude of the frequency behaviour (F) in linear frequency scale for a coupling length of 0,5 m, re

10、spectively 2 m and relative dielectric permittivity of 2,3 and 1,1 for the inner, respectively outer circuit 9 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

11、 the inner, respectively outer circuit 10 Figure 5 Example for the extrapolation of the scattering parameter S21in 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

12、 . 11 Figure 6 Example for the extrapolation of the scattering parameter S21in 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 . 12 Figure 7 Measurement of S11of the o

13、uter circuit (tube) having a length of 50 cm 14 Figure 8 Example of test head (COMET set-up) . 15 Figure 9 Example on how to obtain the electrical length of the test head from the S11measurement using a bare copper wire as DUT (COMET set-up) 16 Figure 10 Example for an RG58 type cable in 2 m triaxia

14、l set-up (COMET) 17 BS IEC 62153-4-16:2016IEC 62153-4-16:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ METALLIC COMMUNICATION CABLE TEST METHODS Part 4-16: Electromagnetic compatibility (EMC) Extension of the frequency range to higher frequencies for transfer impedance and to lower fre

15、quencies for screening attenuation measurements using the triaxial set-up FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote int

16、ernational co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereaf

17、ter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also partic

18、ipate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an

19、international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all r

20、easonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply

21、 IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of co

22、nformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publi

23、cation. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect,

24、or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the corr

25、ect application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62153-4-16 has been prepare

26、d by IEC technical committee 46: Cables, wires, waveguides, RF connectors, RF and microwave passive components and accessories. The text of this standard is based on the following documents: FDIS Report on voting 46/615/FDIS 46/622/RVD Full information on the voting for the approval of this standard

27、 can be found in the report on voting indicated in the above table. BS IEC 62153-4-16:2016 4 IEC 62153-4-16:2016 IEC 2016 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 62153 series, published under the general title Metallic commu

28、nication cable test methods, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the p

29、ublication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for

30、 the correct understanding of its contents. Users should therefore print this document using a colour printer. BS IEC 62153-4-16:2016IEC 62153-4-16:2016 IEC 2016 5 METALLIC COMMUNICATION CABLE TEST METHODS Part 4-16: Electromagnetic compatibility (EMC) Extension of the frequency range to higher freq

31、uencies for transfer impedance and to lower frequencies for screening attenuation measurements using the triaxial set-up 1 Scope 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 lowe

32、r 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 fo

33、r 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. 2 Normative ref

34、erences The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments

35、) applies. IEC TS 62153-4-1:2014, Metallic communication cable test methods Part 4-1: Electromagnetic compatibility (EMC) Introduction to electromagnetic screening measurements IEC 62153-4-3, Metallic communication cable test methods Part 4-3: Electromagnetic compatibility (EMC) Surface transfer imp

36、edance Triaxial method IEC 62153-4-4, Metallic communication cable test methods Part 4-4: Electromagnetic compatibility (EMC) Test method for measuring of the screening attenuation as up to and above 3 GHz, triaxial method IEC 61156-1:2007, Multicore and symmetrical pair/quad cables for digital comm

37、unications Part 1: Generic specification IEC 61156-1:2007/AMD1:2009 IEC TR 62152:2009, Transmission properties of cascaded two-ports or quadripols Background of terms and definitions 3 Acronyms CUT cable under test DUT device under test BS IEC 62153-4-16:2016 6 IEC 62153-4-16:2016 IEC 2016 4 Overvie

38、w The triaxial set-up can be used to measure both the surface transfer impedance (IEC 62153-4-3) and the screening attenuation (IEC 62153-4-4). The transfer impedance is in general measured with a coupling length of max. 0,5 m resulting in an upper frequency limit of around 100 MHz, whereas the scre

39、ening attenuation is in general measured with a coupling length of 2 m to 3 m resulting in a upper frequency limit for the transfer impedance of around 10 MHz and a lower frequency limit for the screening attenuation of around 100 MHz (see also IEC TS 62153-4-1:2014 Clause 8 and 9). Figure 1 shows t

40、he grey zone between electrically short (measurement range for the transfer impedance) and electrically long (measurement range for the screening attenuation). In the example, the transfer impedance can be measured up to around 30 MHz using a coupling length of 50 cm and the screening attenuation ca

41、n be measured starting from 150 MHz using a coupling length of 200 cm. Simulation using following parameters: simulated measurement of S21according IEC 62153-4-3 method B, where the value of the load resistor equals the characteristic impedance of the CUT: impedance of inner circuit is 50 ; impedanc

42、e of outer circuit is 150 ; relative dielectric permittivity of inner circuit 2,3; relative dielectric permittivity of outer circuit 1,1; coupling length 50 cm and 200 cm. transfer impedance calculated according T. KLEY 21for a copper braid design of: diameter under braid 2,95 mm, number of spindles

43、 16, number of wires per spindle 5, wire diameter 0,12 mm, lay length 15 mm. Figure 1 Simulation of the scattering parameter S21(left hand scale) and the transfer impedance (right hand scale) for a single braid screen _ 1Figures in square brackets refer to the Bibliography. IEC BS IEC 62153-4-16:201

44、6IEC 62153-4-16:2016 IEC 2016 7 The present document describes how 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

45、 IEC 62153-4-4. 5 Frequency behaviour of the triaxial set-up Knowing the frequency behaviour of the triaxial set-up one may convert a screening attenuation measurement to transfer impedance and vice versa. And on the other hand, one may extend the results of the measured transfer impedance to higher

46、 frequencies. The general equations for the coupling between the inner and outer circuit for any load conditions are described in 2 and 3. In the following, the capacitive coupling through the screen and the attenuation of the inner and outer circuit are neglected and the CUT is considered to be mat

47、ched at the near and far end. In this case, the frequency behaviour of the triaxial set-up is obtained from the coupling equations given in IEC TS 62153-4-1:2014, 9.2.2: xnxnjnxxxjnNF sinsincoscos1112= (1) nxjvnxxjxN sincossincos += (2) 011122cfLLLxr = (3) r1r22112=n (4) f22RZv = (5) where F is the

48、function describing the frequency behaviour of the triaxial set-up, where the capacitive coupling through the screen and the attenuation of the inner and outer circuit are neglected and the CUT is matched at the far end; N is the auxiliary function; x is the product of phase constant and coupling le

49、ngth; L is the coupling length; 1,2 is the wave length in the inner circuit (cable), respectively outer circuit (tube); null1,2 is the phase constant in the inner circuit (cable), respectively outer circuit (tube); f is the frequency; r1,2 is the relative dielectric permittivity of the inner circuit (cable), respectively outer circuit (tube); c0is the velocity of light in free space; n is