I E C 61 6-4 ® Edition 3.0 201 5-09 I N TE RN ATI ON AL S TAN D ARD colour i n sid e C oaxi al com m u n i cati on cabl es – IEC 61 96-4:201 5-09(en) P art 4: Secti on al s peci fi cati on for rad i ati n g cabl es T H I S P U B L I C AT I O N I S C O P YRI G H T P RO T E C T E D C o p yri g h t © I E C , G e n e v a , S wi tz e rl a n d All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester If you have any questions about I EC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local I EC member National Committee for further information IEC Central Office 3, rue de Varembé CH-1 21 Geneva 20 Switzerland Tel.: +41 22 91 02 1 Fax: +41 22 91 03 00 info@iec.ch www.iec.ch Ab ou t th e I E C The I nternational Electrotechnical Commission (I EC) is the leading global organization that prepares and publishes I nternational Standards for all electrical, electronic and related technologies Ab o u t I E C p u b l i ca ti o n s The technical content of IEC publications is kept under constant review by the IEC Please make sure that you have the latest edition, a corrigenda or an amendment might have been published I E C Catal og u e - webstore i ec ch /catal og u e The stand-alone application for consulting the entire bibliographical information on IEC International Standards, Technical Specifications, Technical Reports and other documents Available for PC, Mac OS, Android Tablets and iPad I E C pu bl i cati on s s earch - www i ec ch /search pu b The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,…) It also gives information on projects, replaced and withdrawn publications E l ectroped i a - www el ectroped i a org The world's leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in additional languages Also known as the International Electrotechnical Vocabulary (IEV) online I E C G l os sary - s td i ec ch /g l oss ary More than 60 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002 Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR I E C J u st Pu bl i s h ed - webstore i ec ch /j u stpu bl i sh ed Stay up to date on all new IEC publications Just Published details all new publications released Available online and also once a month by email I E C C u stom er S ervi ce C en tre - webstore i ec ch /csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csc@iec.ch I E C 61 6-4 ® Edition 3.0 201 5-09 I N TE RN ATI ON AL S TAN D ARD colour i n sid e C oaxi al com m u n i cati on cabl es – P art 4: Secti on al s peci fi cati on for rad i ati n g cabl es INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.1 20.1 ISBN 978-2-8322-2892-0 Warn i n g ! M ake su re th a t you obtai n ed th i s pu bl i cati on from an au th ori zed d i s tri bu tor ® Registered trademark of the International Electrotechnical Commission –2– I EC 61 96-4: 201 © I EC 201 CONTENTS FOREWORD Scope Norm ative references Terms and definitions Materials and cable construction Cable construction I nner conductor Conductor m aterial 2 Conductor construction Dielectric 4 Outer conductor Sheath Standard rating and characteristics Nominal characteristic impedance Rated tem perature range Operating frequency I dentification, marking and labeling Cable identification Cable marking Labelling Tests of finished cables General Electrical testing of the finished cable (see Table ) 1 Environm ental testing (see Table 2) Mechanical testing (see Table 3) Fire perform ance testing (see Table 4) Quality assessment Delivery and storage Annex A (normative) Attenuation constant A Procedure A 1 General A Ground-level method A Free-space m ethod A Measurem ent (see Figures A.1 and A 2) A Evaluation A Requirement Annex B (normative) Coupling loss (far field) B Procedure B 1 General B Ground-level method B Free-space m ethod B Measurem ent (see Figures B.3 and B 4) B Evaluation B Requirement B Test report I EC 61 96-4: 201 © I EC 201 –3– Annex C (inform ative) Coupling loss around circumferential orientation of radiating cable 21 C General 21 C Definitions 21 C Coupling loss chart around circumferential orientation of radiating cable (Y-Z) 21 C 2 Out-of roundness of coupling loss chart around circum ferential orientation of radiating cable 21 C Test method 21 C Calculation 22 C Requirements 22 C Test report 22 Annex D (under stud y) Radiating intensity around circum ferential orientation of radiating cable 24 D General 24 D Definitions 24 D Radiation intensity chart around circum ferential orientation of radiating cable (Y-Z) 24 D 2 Out-of roundness of radiation intensity chart around circumferential orientation of radiating cable 24 D Test method 25 D Calculation 25 D Requirements 26 D Test report 27 Bibliograph y 28 Figure A – Attenuation constant with ground-level method Figure A – Attenuation constant with free-space method Figure B – Antenna orientations with ground-level method Figure B – Antenna orientations with free-space m ethod Figure B – Coupling loss with ground-level m ethod 20 Figure B – Coupling loss with free-space m ethod 20 Figure C.1 – Example of coupling loss chart around circum ferential orientation of radiating cable 22 Figure D.1 – Example of testing arrangem ent of radiation intensity chart around circumferential orientation of radiating cable 25 Figure D.2 – Example of radiation intensity chart around circumferential orientation of radiating cable 26 Table Table Table Table – Electrical testing 1 – Environmental testing – Mechanical testing – Fire performance testing –4– I EC 61 96-4: 201 © I EC 201 INTERNATI ONAL ELECTROTECHNI CAL COMMISSI ON _ C O AXI AL C O M M U N I C AT I O N P a rt : C AB L E S – S e c ti o n a l s p e c i fi c a ti o n fo r d i a ti n g c a b l e s FOREWORD ) The I nternati on al Electrotechni cal Comm ission (I EC) is a worl d wid e organization for stan dardization com prisin g all n ation al el ectrotechnical comm ittees (I EC National Comm ittees) The object of I EC is to prom ote internati onal co-operation on all questions concerni ng stand ardi zati on in the el ectrical an d electronic fields To this end and in additi on to other acti vities, I EC publish es I nternational Stan dards, Techn ical Specifications, Technical Reports, Publicl y Avail abl e Specificati ons (PAS) an d Gu ides (h ereafter referred to as “I EC Publication(s)”) Thei r preparation is entrusted to technical comm ittees; any I EC National Comm ittee interested in the subj ect dealt with m ay partici pate in this preparatory work I nternational, governm ental an d n on governm ental organ izations l iaising with th e I EC also participate i n this preparation I EC collaborates closel y with the I ntern ational Organi zation for Stand ardization (I SO) in accordance with ditions determ ined by agreem ent between th e two organi zati ons 2) The form al decisions or ag reem ents of I EC on tech nical m atters express, as n early as possible, an i nternati onal consensus of opi nion on the rel evant subjects since each technical com m ittee has representati on from all interested I EC N ational Com m ittees 3) I EC Publications have the form of recomm endations for intern ational use an d are accepted by I EC National Com m ittees in that sense While all reasonable efforts are m ade to ensure that the tech nical content of I EC Publications is accu rate, I EC cann ot be h eld responsi ble for th e way in which th ey are used or for an y m isinterpretation by an y en d u ser 4) I n order to prom ote intern ational u niform ity, I EC National Com m ittees und ertake to apply I EC Publications transparentl y to the m axim um extent possible i n their national an d regi on al publicati ons Any d ivergence between an y I EC Publication and the correspondi ng national or regi on al publicati on sh all be clearl y in dicated in the latter 5) I EC itself d oes n ot provi de an y attestation of conform ity I n depend ent certificati on bodies provi de conform ity assessm ent services and, in som e areas, access to I EC m arks of conform ity I EC is not responsi ble for an y services carri ed out by ind ependent certification bodi es 6) All users shou ld ensure that they h ave the l atest editi on of thi s publicati on 7) No liability shall attach to I EC or its directors, em ployees, servants or ag ents inclu din g in divi dual experts an d m em bers of its tech nical com m ittees and I EC Nati on al Com m ittees for any person al i nju ry, property d am age or other dam age of any n ature whatsoever, wheth er di rect or indirect, or for costs (includ i ng leg al fees) and expenses arisi ng out of the publ ication, use of, or relian ce upon, this I EC Publicati on or any other I EC Publications 8) Attention is drawn to th e N orm ative references cited in th is publ ication Use of the referenced publ ications is indispensable for the correct applicati on of this publication 9) Attention is drawn to the possibility that som e of the elem ents of this I EC Publication m ay be the su bject of patent rig hts I EC shall not be held responsibl e for identifyi ng any or all such patent ri ghts I nternational Standard I EC 61 96-4 has been prepared by subcomm ittee 46A: Coaxial cables, of I EC technical committee 46: Cables, wires, waveguides, R.F connectors, R.F and microwave passive com ponents and accessories This third edition cancels and replaces the second edition published in 2004 This edition constitutes a technical revision The m ain changes with respect to the previous edition are as follows: – – – – a definition for coupling loss was added , Clause "Materials and cable construction" was added, rated tem perature range, operating frequency and radiating characteristics as standard rating and characteristics were added, identification, marking and labeling was added, I EC 61 96-4: 201 © I EC 201 – – – – –5– the tables of test procedures were revised, quality assessm ent and packaging was added, Annex C, “Coupling loss around circum ferential orientation of radiating cable” was added Annex D “Radiating intensity around circum ferential orientation of radiating cable” was added The text of this standard is based on the following documents: FDI S Report on votin g 46A/1 256/FDI S 46A/1 273/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table This publication has been drafted in accordance with the I SO/I EC Directives, Part This publication is to be read in conjunction with I EC 61 96-1 :2005 A list of all the parts in the I EC 61 96 series published under the general title Coaxial communication cables can be found on the I EC website The committee has decided that the contents of this publication will rem ain unchanged until the stability date indicated on the I EC website under "http: //webstore.iec.ch" in the data related to the specific publication At this date, the publication will be • • • • reconfirmed, withdrawn, replaced by a revised edition, or am ended A bilingual version of this publication may be issued at a later date I M P O RT AN T – T h e ' c o l o u r i n s i d e ' th at it co n tai n s u n d e rs t a n d i n g c o l o u r p ri n t e r of c o l o u rs i ts wh i c h c o n te n ts l og o a re U s e rs on th e co ve r p a g e o f th i s c o n s i d e re d s h ou l d to t h e re fo re be p u b l i c ati o n u s e fu l p ri n t th i s fo r i n d i c ate s th e d o cu m en t c o rre c t u sin g a –6– C O AXI AL C O M M U N I C AT I O N P a rt : I EC 61 96-4: 201 © I EC 201 C AB L E S – S e c ti o n a l s p e c i fi c a ti o n fo r d i a ti n g c a b l e s S cop e This part of I EC 61 96 applies to radiating coaxial comm unication cables These cables are intended for use in wireless comm unication system s, such as tunnels, railways, highways, subways, elevators and other installations in which conventional antenna transm ission is not satisfactory or even im possible It is to be read in conj unction with I EC 61 96-1 : 2005 N o rm a t i ve re fe re n c e s The following docum ents, in whole or in part, are normativel y referenced in this docum ent and are indispensable for its application For dated references, onl y the edition cited applies For undated references, the latest edition of the referenced docum ent (including an y amendments) applies I EC 60068-1 : 201 3, Environmental testing – Part 1: General and guidance IEC 60068-2-61 , Environmental testing – Part 2-61: Test methods: Test Z/ABDM: Climatic sequence IEC 60332-1 -2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure for kW premixed flame IEC TS 60695-7-50, Fire hazard testing – Part 7-50: Toxicity of fire effluent – Estimation of toxic potency – Apparatus and test method IEC TS 60695-7-51 , Fire hazard testing – Part 7-51: Toxicity of fire effluent – Estimation of toxic potency: Calculation and interpretation of test results I EC 60754-1 , Test on gases evolved during combustion of materials from cables – Part 1: Determination of the halogen acid gas content IEC 6081 -406, Electric and optical fibre cables – Test methods for non-metallic materials – Part 406: Miscellaneous tests – Resistance to stress cracking of polyethylene and polypropylene compounds IEC 61 034-2: 2005, Measurement of smoke density of cables burning under defined conditions – Part 2: Test procedure and requirements I EC 61 96-1 : 2005, Coaxial communication cables – Part 1: Generic specification – General, definitions and requirements I EC 61 96-1 -1 , Coaxial communication cables – Part 1-1: Capability approval for coaxial cables I EC 61 96-4: 201 © I EC 201 –7– IEC 61 96-1 -1 00, Coaxial communication cables – Part 1-100: Electrical test methods – General requirements IEC 61 96-1 -1 01 , Coaxial communication cables – Part 1-101: Electrical test methods – Test for conductor d.c resistance of cable I EC 61 96-1 -1 02, Coaxial communication cables – Part 1-102: Electrical test methods – Test for insulation resistance of cable dielectric IEC 61 96-1 -1 03, Coaxial communication cables – Part 1-103: Electrical test methods – Test for capacitance of cable IEC 61 96-1 -1 05, Coaxial communication cables – Part 1-105: Electrical test methods – Test for withstand voltage of cable dielectric I EC 61 96-1 -1 06, Coaxial communication cables – Part 1-106: Electrical test methods – Test for withstand voltage of cable sheath IEC 61 96-1 -1 08, Coaxial communication cables – Part 1-108: Electrical test methods – Test for characteristic impedance, phase and group delay, electrical length and propagation velocity IEC 61 96-1 -1 2, Coaxial communication cables – Part 1-112: Electrical test methods – Test for return loss (uniformity of impedance) I EC 61 96-1 -1 5, Coaxial communication cables – Part 1-115: Electrical test methods – Test for regularity of impedance (pulse/step function return loss) IEC 61 96-1 -200, Coaxial communication cables – Part 1-200: Environmental test methods – General requirements IEC 61 96-1 -201 , Environmental test methods – Part 1-201: Environmental test methods – Test for cold bend performance of cable IEC 61 96-1 -300, Coaxial communication cables – Part 1-300: Mechanical test methods – General requirements I EC 61 96-1 -301 , Coaxial communication cables – Part 1-301: Mechanical test methods – Test for ovality IEC 61 96-1 -302, Coaxial communication cables – Part 1-302: Mechanical test methods – Test for eccentricity IEC 61 96-1 -31 4: 2006, Coaxial communication cables – Part 1-314: Mechanical test methods – Test for bending IEC 61 96-1 -31 7, Coaxial communication cables – Part 1-317: Mechanical test methods – Test for crush resistance of cable IEC TR 62222, Fire performance of communication cables installed in buildings IEC 62230: 2006, Electric cables – Spark-test method –8– I EC 61 96-4: 201 © I EC 201 T e rm s a n d d e fi n i t i o n s For the purposes of this docum ent, the terms and definitions given in I EC 61 96-1 and the following definitions apply d i a t i n g ( c o a xi a l ) c a b l e coaxial communication cable with outer conductors that are intentionall y not com pletel y closed, so that part of the electrom agnetic wave energ y transmitted or received through the cable is coupled by a bidirectional transm ission system formed by the outer conductor of the cable and the external environment Note – – – – – – – to entry: The cou pli ng intensity between cabl e an d m obil e eq uipm ent depends on: construction of the cable; characteristics of antenna (such as the type, the ori entation, gain, etc ); distance and orientati on of th e m obile antenn a from the cabl e; natu re of am bient atm osphere; operati ng frequency rang e; m anner of i nstallati on of th e cable; shape, m ateri al and size of surrou ndi ng buil din gs cou p l i n g L loss ratio of the power Pt transm itted into the radiating cable at one point to the power Pr received by a half-wavelength dipole antenna located at a distance from the radiating cable at the same point (see form ula ) c Note to entry: I t is an im portant param eter of radi ating coaxi al cabl es to distingu ish it from general coaxial comm unications cables Lc = log1 Pt Pr (1 ) where L c is the coupling loss, in dB; Pt is the transmission power in the radiating cable at one point, in W; Pr is the receiving power of the half-wavelength dipole antenna at a distance from the radiating cable at the sam e point, in W M a t e ri a l s a n d c a b l e c o n s t ru c t i o n C a b l e c o n s t ru c t i o n The cable construction shall be in accordance with 4.2 to of this standard and the requirem ents stated in the detail specification 4 I n n er d u ctor C o n d u c t o r m a t e ri a l Subclauses 4 to 4 of I EC 61 96-1 : 2005 appl y The conductor m aterial shall be as stated in the relevant cable detail specification – 16 – Ns L I EC 61 96-4: 201 © I EC 201 is the power level at cable end (port B), in dBm ; is the length of the cable, in m NOTE Since resisti ve l oss an d coupl i ng l oss are both present, α cann ot be corrected for th e tem peratu re A Req u i rem en t The attenuation constant shall not be higher than the values specified in the detail specification Spectrum anal yser or equi val ent L (m ) Port B Troll ey Non -m etallic part, cm height Concrete floor Radi atin g cabl e Port A Signal gen erator IEC F i g u re A – Atten u ati o n s tan t wi th g rou n d -l evel m eth o d Port B Spectrum anal yser or equi val ent L (m ) Radiatin g cable Non -m etallic posts 2m Port A Troll ey Concrete floor Signal gen erator F i g u re A – Atten u ati o n s ta n t wi th fre e-s p ace m eth od IEC I EC 61 96-4: 201 © I EC 201 – 17 – Annex B (normative) Coupling loss (far field) B.1 Procedure B.1 General Measurements can be carried out by one of the two methods, where the free-space m ethod shall be the arbitration methods when there is an argument: – – ground-level m ethod; free-space m ethod B.1 Ground-level method The arrangem ent of the cable is given in Figure B The cable is laid on non-m etallic spacers which give the cable a distance from the concrete floor of cm to cm The cable shall be at least of the length wavelength of the measuring frequency λ and not less than 50 m , where λ is the cable The antenna is fixed to a trolley and m oved along the cable, the centre of the antenna positioned vertically above the cable at a distance of about m (or the distance which user requests) Preferabl y a half-wavelength dipole shall be used NOTE Additional distances m ay be ad ded in th e detail speci fication The spatial orientation of the antenna shall be as specified in the detail specification IEC Key cable orth og onal rad ial parall el Figure B.1 – Antenna orientations with ground-level method B.1 Free-space method The arrangem ent of the cable is given in Figure B The cable is laid on non-metallic posts at a height of ,5 m to m The cable shall be at least of the length wavelength of the measuring frequency λ and not less than 50 m , where λ is the cable – 18 – I EC 61 96-4: 201 © I EC 201 The antenna is put on a trolley and moved parallel to the cable The height of the antenna centre shall be the sam e as that of the cable and its horizontal distance from the cable shall be about m (see note in B 2) Preferabl y a half-wavelength dipole shall be used Type and gain of antenna used shall be stated in the test report No other metallic parts than the cable and the antenna shall be included within a cylinder of m (min.) in diameter surrounding the axis of the cable and the centre of the antenna The spatial orientation of the antenna shall be as specified in the detail specification For basic antenna orientations for a dipole, see Figure B 2 IEC Key cable orth og onal rad ial parall el Figure B.2 – Antenna orientations with free-space method B.2 Measurement (see Figures B.3 and B.4) Adjust the generator frequency and output power level Feed the signal to port A of the cable Record the power level received by the antenna as a function of the distance of the antenna from the input port A of the cable by a spectrum anal yser or equivalent There should be sufficient local resolution for the measurem ent to be valid Therefore, m easurements per half-wavelength should be made to calculate the coupling loss for reception probabilities up to 95 % To calculate higher reception probabilities, a sam pling rate of 20 measurem ents per half-wavelength should be m ade I f there is an argument the total num ber of m easurem ent shall not be less than 000 B.3 Evaluation Com pute local coupling loss as: Lc ( z ) = Ne − Nr ( z ) − (α ⋅ z ) − G where G is the gain of the antenna; (B ) I EC 61 96-4: 201 © I EC 201 Lc( z) Ne Nr α z is is is is is the the the the the – 19 – level of local coupling loss from the input end ( z) of cable, in dB; power level at the cable input, in dBm; power level at the antenna, in dBm; attenuation constant, in dB/1 00 m; distance from cable input to the antenna, in 00 m Cable with periodic structures of radiating apertures create an RF field with a m ain lobe moving from the feeding end (port A) of the radiating cable to the terminated end (port B) with increasing frequency The frequency specific lobe angle has to be considered when eliminating end effects from the test results for the statistical evaluation of reception probability The m easured coupling loss is characterized by two typical figures: – – Coupling loss L c50 (median value): 50 % reception probability, 50 % of the measured local values are smaller than this value Coupling loss L c95 : 95 % reception probabilities, 95 % of the m easured local values are smaller than this value M ean valu e of cou pli ng l oss: I f the coupling loss has been measured with three antenna orientations, which are orthogonal to each other, the coupling loss can be given as the mean value of the m easuring results As the coupling loss is a logarithmic figure, the m ean coupling loss is derived from the absolute figures of the three antenna orientations: Lc, mean = −1 ⋅ log Lc,2 Lc,3 − Lc,1 − − 1 +10 +10 10 10 (B.2) where L c, , L c, and L c, are the coupling losses for the three orthogonal antenna orientations, in dB B.4 Req uirement The characteristic values of coupling loss for a given reception probability shall not exceed the values specified in the detail specification B.5 Test report Test report shall give the following information: a) b) c) d) e) f) g) test sam ple length; test temperature; test method; antenna type; antenna gain; antenna orientation; the distance between antenna and radiating cable (if not m ) – 20 – I EC 61 96-4: 201 © I EC 201 Antenn a Load L (m ) Port B 2m Radi atin g cable Non -m etallic part, cm height Concrete floor Spectrum anal yser or equi val ent Port A Signal gen erator Troll ey IEC Figure B.3 – Coupling loss with ground-level method Port B Load L (m ) Non -m etallic posts 2m Concrete floor 2m Port A Radi atin g cable Signal gen erator Antenn a Spectrum anal yser or equi val ent Troll ey IEC Figure B.4 – Coupling loss with free-space method I EC 61 96-4: 201 © I EC 201 – 21 – Annex C (informative) Coupling loss around circumferential orientation of radiating cable C.1 General I f required the radiation characteristics of radiating cable around the circum ferential orientation (Y-Z) can be evaluated in addition to the coupling loss specified in Annex B Annex C gives an evaluating m ethod of radiating characteristics by the coupling loss around circumferential orientation of radiating cable C.2 C.2.1 Definitions Coupling loss chart around circumferential orientation of radiating cable (Y-Z) Chart m ade of the coupling losses m easured around radiating cable in a perpendicular distance I t represents coupling loss magnitude around radiating cable C.2.2 Out-of roundness of coupling loss chart around circumferential orientation of radiating cable Out-of roundness of coupling loss is the difference between the maxim um and the minimum coupling loss in a specified angle area φ of the coupling loss chart m easured in circum ferential orientation I t represents the uniformity of coupling loss in a specified φ angle area around circumferential orientation, as shown in formula (C ) Out-of roundness of coupling loss chart: Lc, max − Lc, = (C ) where L c, m ax L c, m in C.3 is the the m axim um coupling loss in angle φ area; is the the m inim um coupling loss in angle φ area Test method The cable shall be at least of the length wavelength of the measuring frequency λ and not less than 50 m , where λ is the cable Arrangement of cable is the same as Figure B Rotate the radiating cable so that its slots are oriented to the antenna in 0° and m easure and calculate the coupling loss L c according to Annex B (it m ay be represented in L c50, in 50 % reception probability or in L c95 in 95 % reception probability, as specified in Clause B 3) ， ， Rotate the cable 360° in counter clockwise, and m easure and calculate the coupling loss L c, φ in each 5° interval (or smaller than that) in the sam e way above – 22 – C.4 I EC 61 96-4: 201 © I EC 201 Calculation Draw the chart L c, φ ～ φ, as shown in Figure C Find the m axim um coupling loss and minimum coupling loss in a specified φ angle area and calculate the out-of -roundness of coupling loss as shown in formula (C ) IEC Test sam ple and length: SLR-50-22(7/8 ＂ ), 50 m Test tem perature: 26 °C Test m ethod: free space m ethod The orientation of anten na: perpen dicularity (Y di rection) Test frequ ency: 900 M Hz Recepti on probability of cou pli ng loss: 95 % Figure C.1 – Example of coupling loss chart around circumferential orientation of radiating cable C.5 Requirements When required, the coupling loss chart around circum ferential orientation and its out-of roundness in specified φ angle area shall be less than the values specified C.6 Test report Test report shall give the following information: a) b) c) d) e) f) test sample length; test tem perature; test method; antenna type; antenna gain; antenna orientation; I EC 61 96-4: 201 © I EC 201 – 23 – g) measuring frequency; h) distance between antenna and radiating cable (if not m ); i) reception probability of coupling loss – 24 – I EC 61 96-4: 201 © I EC 201 An n ex D (under study) Rad i ati n g i n ten s i ty arou n d ci rcu m feren ti al ori en tati on of rad i ati n g cabl e NOTE Most radi ating cables are m ade with period icall y arrang ed apertures building a l on gitudi nal anten na array The characteristic beam form ing requi res the su perpositi on of electrom ag netic fields generated by m ultiple g rou ps of apertures Dependi ng on the freq uency ban d of operati on , the periodic structure can have a len gth of several m eters Therefore, the d escri bed test m ethod, usi ng a sh ort cabl e section of onl y m , is not appropri ate to determ ine the beh avi ou r of a long cabl e with periodicall y arran ged apertu res D G en eral I f required the radiation characteristics of radiating cable around the circum ferential orientation (Y-Z) can be evaluated Annex D gives an evaluation m ethod of the radiation characteristics by the radiation intensity around the circumferential orientation of radiating cable D D Defi n i ti on s Rad i ati o n i n ten s i ty ch a rt a rou n d ci rcu m fe ren ti al o ri en tati on of rad i ati n g cab l e (Y-Z) The radiation intensity measured around a radiating cable in perpendicular distance represents the radiation intensity in circumferential orientation D 2 O u t-of ro u n d n e s s of d i ati on i n te n s i ty ch art a rou n d ci rcu m fe ren ti a l ori en tati on of rad i ati n g ca bl e Out-of-roundness of radiation intensity is the difference between the m aximum and the minim um radiation intensity in a specified angle area φ in the radiation intensity chart around the circumferential orientation I t represents the uniform ity of radiation intensity in a specified φ angle area around circumferential orientation, as shown in form ula (D ) P −P Out − of − roundness of radiation intensity = max where Pm ax Pm in is the maximum radiation intensity in angle φ area; is the minimum radiation intensity in angle φ area (D ) I EC 61 96-4: 201 © I EC 201 D.3 – 25 – Test method The radiating cable shall be arranged as in Figure D.1 by using the free-space method and aligning to source antenna in hom opolarity The length of cable shall not be less than m and the test point shall be in the m iddle of the sample I t should be done in anechoic cham ber when there is an argument Rotate the radiating cable so that its slots are oriented to the antenna in 0° and measure the radiating intensity P0 Rotate the cable 360° in counter clockwise, and measure the radiation intensity Pφ in each 5° interval (or smaller than that) in the sam e way above L Radi atin g calbe under test Source antenna Rotati ng m achine IEC Figu re D.1 – Example of testing arrangement of radiation intensity chart around circumferential orientation of radiating cable D.4 Calculation Draw the chart P φ ～ φ as shown in Figure D.2 Find the maximum radiation intensity and m inimum radiation intensity in a specified φ angle area and calculate the out-of-roundness of radiating intensity as shown in form ula (D ) – 26 – I EC 61 96-4: 201 © I EC 201 IEC Test sam ple and length: SLR-50-22(7/8 ＂ ), m Test tem perature: 28 °C Test m ethod: free space m ethod in an an echoic cham ber Source of antenn a: BBHA91 20G Test frequ ency: 900 M Hz The distance ( L ) between radiating cabl e an d antenna: 38 m Figure D.2 – Example of radiation intensity chart around circu mferential orientation of radiating cable NOTE BBHA91 20G is a d oubl e did ged broadband h orn antenna from Schwarzbeck D.5 Requirements I f required the radiation intensity chart around the circumferential orientation and its out-ofroundness in the specified angle φ shall be within the specified values Schwarzbeck is an exam ple of a suitable prod uct avail abl e comm ercially This inform ation is g iven for th e conveni ence of users of this stand ard an d does not constitute an en dorsem ent by I EC of this product I EC 61 96-4: 201 © I EC 201 D – 27 – Test report Test report shall give the following information: a) b) c) d) e) test sam ple length; test tem perature; test method; source antenna; measuring frequency; distance (L) between antenna and radiating cable; testing point in radiating cable (if not in the m iddle of the cable) – 28 – I EC 61 96-4: 201 © I EC 201 Bibliography I EC 61 96-1 -209, Coaxial communication cables – Part 1-209: Environmental test methods – Thermal cycling I EC 61 96-1 -1 0, Coaxial communication cables – Part 1-110: Electrical test methods – Test for continuity I EC 61 96-1 -21 5, Coaxial communication cables – Part 1-215: Environmental test methods – High temperature cable ageing _ Under considerati on Under considerati on Under considerati on INTERNATIONAL ELECTROTECHNICAL COMMISSI ON 3, rue de Varembé PO Box 31 CH-1 21 Geneva 20 Switzerland Tel: + 41 22 91 02 1 Fax: + 41 22 91 03 00 info@iec.ch www.iec.ch