BS DD IEC PAS 62437-2006 Radio disturbance characteristics for the protection of receivers used on board vehicles boats and on devices - Limits and methods of measurement - Specifi.pdf

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2、active antennasICS 33.100.10; 33.100.20Radio disturbance characteristics for the protection of receivers DRAFT FOR DEVELOPMENTDD IEC/PAS 62437:2005DD IEC/PAS 62437:2005This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 18 January 2006 BSI 1

3、8 January 2006ISBN 0 580 47412 7announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into an international standard, to extend the life of the Technical

4、 Specification for another 3 years or to withdraw it. Comments should be sent in writing to the Secretary of BSI Subcommittee GEL/210/11, EMC Product standards, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where pos

5、sible, an appropriate revision of the text.A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue

6、under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct a

7、pplication.Compliance with a Draft for Development does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the IEC/PAS title page, pages 2 to 12, an inside back cover and a back cover.The BSI copyright notice displayed i

8、n this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Commentsstandard, but made available to the public and established in an organization operating under a given procedure.Comments arising from the use of this Draft for Development are request

9、ed so that UK experience can be reported to the international organization responsible for its Technical Specification. A review of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its status at the e

10、nd of its 3-year life. Notification of the start of the review period will be made in an National forewordThis Draft for Development reproduces verbatim IEC/PAS 62437:2005.This publication is not to be regarded as a British Standard.It is being issued in the Draft for Development series of publicati

11、ons and is of a provisional nature because it is necessary to gather experience with the described methods. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained.A PAS is a Technical Specification not fulfilling the requiremen

12、ts for a PUBLICLY AVAILABLE SPECIFICATION IECPAS 62437First edition2005-09Radio disturbance characteristics for the protection of receivers used on board vehicles, boats, and on devices Limits and methods of measurement Specifications for active antennas Reference number IEC/PAS 62437:2005(E) INTERN

13、ATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE DD IEC/PAS 62437:2005 2 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope 6 2 Normative references .6 3 Terms and definitions .6 4 Set-up for noise-floor measurement 7 Annex A (informative) Examples for artificial antenna networks.10 Figure 1 Example test set

14、-up for noise-floor measurements (Category I antennas) 8 Figure 2 Example test set-up for noise-floor measurements (Category II antennas) .8 Figure A.1 Block circuit of an artificial antenna network for antennas intended for rear-screen installation .10 Figure A.2 Block circuit of an artificial ante

15、nna network for antennas intended for side-screen installation .11 DD IEC/PAS 62437:2005 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE _ RADIO DISTURBANCE CHARACTERISTICS FOR THE PROTECTION OF RECEIVERS USED ON BOARD VEHICLES, BOATS, AND ON DEVICES

16、 LIMITS AND METHODS OF MEASUREMENT SPECIFICATIONS FOR ACTIVE ANTENNAS 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 interna

17、tional 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 (hereafter

18、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 participat

19、e 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 inte

20、rnational 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 reaso

21、nable 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 IEC

22、 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 provides no marking procedure to indicate its app

23、roval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual

24、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, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this I

25、EC 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 correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this I

26、EC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. A PAS is a technical specification not fulfilling the requirements for a standard but made available to the public. IEC-PAS 62437 has been processed by CISPR subcommit

27、tee D: Electromagnetic disturbances related to electric/electronic equipment on vehicles and internal combustion engine powered devices. DD IEC/PAS 62437:2005 4 During the maintenance of CISPR 25, the need for additional information regarding the use of active antennas for on-board reception was rai

28、sed. Since it is necessary to gather experience with the described methods, CISPR subcommittee D decided not to include it as an annex in CISPR 25 for the time being, but to publish it as separate document. The text of this PAS is based on the following document: This PAS was approved for publicatio

29、n by the P-members of the committee concerned as indicated in the following document Draft PAS Report on voting CISPR/D/308/NP CISPR/D/315/RVN Following publication of this PAS, the technical committee or subcommittee concerned will investigate the possibility of transforming the PAS into an Interna

30、tional Standard. This PAS shall remain valid for an initial maximum period of 3 years starting from 2005-09. The validity may be extended for a single 3-year period, following which it shall be revised to become another type of normative document, or shall be withdrawn. DD IEC/PAS 62437:2005 5 INTRO

31、DUCTION Use of active antennas is today the state of the art in vehicles. In principle, active antennas can be handled like any other component/module used in vehicles, but, since they become part of the test equipment when performing radiated emission tests according to Clause 5 of CISPR 25, it mus

32、t be guaranteed that the emissions produced by the active antenna itself will allow these emission measurements. DD IEC/PAS 62437:2005 6 RADIO DISTURBANCE CHARACTERISTICS FOR THE PROTECTION OF RECEIVERS USED ON BOARD VEHICLES, BOATS, AND ON DEVICES LIMITS AND METHODS OF MEASUREMENT SPECIFICATIONS FO

33、R ACTIVE ANTENNAS 1 Scope Active antennas used on board vehicles are electronic components in the sense of CISPR 25. Therefore, the requirements regarding emissions apply to it in its function as EUT. In addition to this, vehicle active antennas are used as part of the measurement chain for the eval

34、uation of emissions produced by any other component in the vehicle. With a passive antenna no special considerations were necessary because it can neither generate emissions nor harmonics due to its linearity. This Publicly Available Specification (PAS) gives additional information for the use of ac

35、tive antennas for radiated emission measurement according to CISPR 25. Test set-ups at component level are defined for the determination of noise floor. The current vehicle antenna technology provides two categories of active antennas. The first category (I) consists of an active part (electronic pa

36、rt) and a passive part (antenna structure). These parts can be considered as two separate “black boxes”. During the emission tests (antenna as EUT), the passive antenna part is normally replaced by an “artificial antenna network”. Antennas with their active and passive parts inseparably combined wit

37、hin one housing are defined as category (II) antennas. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includ

38、ing any amendments) applies. CISPR 25, Radio disturbance characteristics for the protection of receivers used on board vehicles, boats, and on devices Limits and methods of measurement 3 Terms and definitions For the purposes of this document, the following definitions apply. 3.1 antenna matching un

39、it unit for matching the impedance of an antenna output to that of the 50 measuring instrument over the antenna measuring-frequency range 3.2 antenna noise floor voltage measured at the output of an active antenna via an original coaxial cable in the absence of a reception field strength (category I

40、I) or when the passive part of the antenna is replaced by a terminated artificial antenna network (category I) DD IEC/PAS 62437:2005 7 3.3 artificial antenna network (AAN) electrical circuit consisting of lumped inductors, capacitors and resistors giving the same complex scattering parameter S22as t

41、he passive part of the antenna installed in the vehicle, boat or device 3.4 artificial network (AN) line impedance stabilization network (LISN1) network inserted in the supply lead or signal/load lead of apparatus to be tested which provides, in a given frequency range, a specified load impedance fo

42、r the measurement of disturbance voltages and which may isolate the apparatus from the supply or signal sources/loads in that frequency range IEV 161-04-05, modified 3.5 r.f.-amplifier electronic part of the antenna system 3.6 shielded enclosure screened room mesh or sheet metallic housing designed

43、expressly for the purpose of separating electro-magnetically the internal and the external environment IEV 161-04-37 3.7 vehicle active antenna antenna consisting of the passive part, the active part (r.f.-electronic) and the whole vehicle body including the cable harnesses acting as counterpoise 4

44、Set-up for noise-floor measurement Knowledge of the noise floor is strongly required for assessment of emissions when the active antenna is part of the measurement chain. It is not useful to define limits for the noise floor. However, it shall be measured according to the following method and shall

45、be recorded to allow interpretation of measurement results. Noise-floor measurements are required only in the frequency bands for which the antenna is designed. It applies to both category I and II antennas. The measurements shall be performed with the active antenna mounted in a shielded enclosure

46、(see Figures 1 and 2). In the case of a category I antenna, an artificial antenna network (see Annex A) shall be used. The intended coaxial cable shall be used for the connection between the antenna and the measurement receiver or the antenna matching unit (usually applicable for AM bands). Bandwidt

47、hs and detectors shall be chosen in order to cover all emission measurement necessities described in CISPR 25 for which the antenna will be used. 1) In the USA. DD IEC/PAS 62437:2005 8 50 Ohm terminationVoltage source12 V battery Antenna matching unit (if required) Artificial antenna network RF ampl

48、ifier (EUT) Coaxial cable Measure-ment receiverPower linesSmall shielded enclosure RF feed- through plug DC feed-through plugArtificial network (AN) Figure 1 Example test set-up for noise-floor measurements (Category I antennas) Voltage source12 V battery Antenna matching unit (if required) RF ampli

49、fier (EUT) Coaxial cable Measure-ment receiverPower linesSmall shielded enclosure RF feed- through plugDC feed-through plug Artificial network (AN) Passive part of the antenna shielded enclosureFigure 2 Example test set-up for noise-floor measurements (Category II antennas) DD IEC/PAS 62437:2005 9 The process steps described in Annex I of CISPR 25 for vehicle-mounted antennas are applied also at component level. a) The active antenna is replaced by a termination at the antenna