Reciprocity, Spatial Mapping and Time Reversal in Electromagnetics
This long awaited second edition traces the original developments from the 1970s and brings them up to date with new and previously unpublished material to give this work a new lease of life for the early twenty-first century and readers new to the topic.
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C. Altman
K. Suchy
Reciprocity, Spatial Mapping and Time Reversal in Electromagnetics Second Edition
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C. Altman Department of Physics Technion – Israel Institute of Technology Haifa Israel [email protected]
K. Suchy Institute for Theoretical Physics University of D¨usseldorf D¨usseldorf Germany
This is an updated and expanded second edition of the original work Reciprocity, Spatial Mapping and Time Reversal in Electromagnetics, by C. Altman and K. Suchy, published in 1991, ISBN 978-0-7923-1339-7.
ISBN 978-94-007-1529-5 e-ISBN 978-94-007-1530-1 DOI 10.1007/978-94-007-1530-1 Springer Dordrecht Heidelberg London New York Library of Congress Control Number: 2011929883 c Springer Science+Business Media B.V. 1991, 2011 No part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without written permission from the Publisher, with the exception of any material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
Foreword to the second edition
In the revised and updated second edition of the book “Reciprocity, Spatial Mapping and Reciprocity in Electromagnetics” (Kluwer, 1991) we have corrected some (hopefully, most) of the misprints and minor errors in the first edition, and part of Section 7.4 (“The compressible magnetoplasma”) has been rewritten. An Internet search for “time reversal in electromagnetics and acoustics” reveals a host of articles, most of them written after the first edition of this book was published, devoted to the practical implementation of time reversal of pulsed waves in optical, acoustic and microwave communication systems, and of earthquake signals to locate seismic sources. This exciting topic, with its numerous applications, is not the subject of this book, but could not be ignored in the updated second edition and is reviewed in Section 8.1 under the heading “Time reversal by phase conjugation - practical implementation”. While the first edition was in press, the late Prof. Asher Peres drew our attention to some articles published by him and others refuting claims in the scientific literature that asymmetric chiral synthesis could be achieved in spinning vessels. Their arguments based on the application of time-reversal and reflection transformations to the postulated synthesis, illustrate the power of the method and are presented in Section 8.2. The discussion in Section 7.4 devoted to the compressible magnetoplasma with scalar perturbation pressures is inadequate in that, in fact, the scalar pressure gradient in the Euler momentum balance equation should be replaced by the divergence of a pressure tensor, and the adiabatic equation of continuity of the monoatomic ‘electron gas’ should be replaced by an equation of evolution of the pressure tensor. In or
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