1、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
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8、LOREFOR 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 b
9、y 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
10、.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,i
11、mage 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 coef
12、ficient?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
13、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 Sc
14、attering 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 curve
15、s 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-uns
16、ymmetrical 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