IEC_TR_62152-2004.pdf

TECHNICALREPORTIEC TR 62152First edition2004-08Background of terms and definitions of cascaded two-ports Reference number IEC/TR 62152:2004(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICALREPORTIECTR 62152First edition2004-08Background of terms and definitions of cascaded two-portsPRICE CODE?IEC 2004?Copyright-all rights reservedNo 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 the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chXFor price,see current catalogueCommission Electrotechnique InternationaleInternational Electrotechnical Commission?LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 62152?IEC:2004(E)CONTENTSFOREWORD.41General.62Operational,image and insertion transfer functions and complex attenuations or losses.63Terms and definitions.7Annex A(normative)Concepts of normalized voltage waves,square root of power waves and operational attenuation and losses.9A.1 General.9A.2 Complex operational attenuation or operational propagation coefficient?B.9A.3 Impedance.10A.4 Operational reflection coefficient.10A.5 Return loss.10A.6 General coupling transfer function.11A.7 Benefits of the concept of operational quantities.12Annex B(normative)Two-port transmission technique Terms.13Annex C(normative)Two-port theory and fundamental concepts in transmission engineering.14C.1 General.14C.2 Transfer equations for a passive two-port.14C.3 Chain matrix.15C.4 The symmetries and impedances of a two-port.19C.5 Impedance matching.21C.6 Level concepts.23C.7 Attenuation and gain concepts.24C.8 Concepts related to return loss and matching.28C.9 Scattering parameter.35C.9.1Scattering parameter of a one-port.35C.9.2Scattering parameters and scattering matrix of a two-port.38C.10Examples.43C.10.1Example 1.43C.10.2Example 2.45C.11Reference documents.46Figure 1 Defining the transfer functions of a two-port.6Figure 2 Constant value As and Ar curves on a complex plane z=x+jy.8Figure A.1 Coupling between two systems.12Figure C.1 A quadripole or two-port.14Figure C.2 An impedance-unsymmetrical two-port(a)with its equivalent circuit(b).16Figure C.3 Two chained two-ports.17Figure C.4 An impedance-symmetrical two-port.19Figure C.5 An impedance-unsymmetrical two-port for which Z1?Z2when ZA=ZB.19Figure C.6 A two-port terminated with an impedance ZB.20Figure C.7 Reflection less matching.22LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TR 62152?IEC:2004(E)3 Figure C.8 Power matching for maximizing the effective power.22Figure C.9 Absolute and nominal level in a system.24Figure C.10 Definition of the complex image attenuation?of a two-port.24Figure C.11 Definition of the comple