1987

Propagation of Short Radio Waves

Mon, 11 Jun 2018 22:43:31 GMT

This book treats the phenomena associated with the propagation of short radio waves between terminal points, whether they be the radar antenna serving a dual purpose or the antennas of a communications system. The intention is to present a summary of the state of knowledge in the microwave propagation field at the close of the war. There has been no attempt to produce either a handbook or textbook, but only an interim report on a rapidly changing subject. An attempt has been made to survey all relevant information that was available, from whatever source, and to summarise as much of it as was feasible.

Principles of Microwave Circuits

Mon, 11 Jun 2018 22:39:17 GMT

Principles of Microwave Circuits is an unabridged reprint of the book first published in 1948 by McGraw Hill as Volume 8 of the MIT Radiation Laboratory Series. Since the original publication of this book, a number of errors have been brought to our attention. Corrections of these errors are incorporated in this edition.

In the engineering application of low-frequency currents, an important step forward was the development of the impedance concept and its utilization through the theory of linear networks. It was almost inevitable that this concept would be generalized and become useful in the application of microwaves. This volume is devoted to an exposition of the impedance concept and to the equivalent circuits of microwave devices. It is the intention to emphasise the underlying principles of these equivalent circuits and the results that may be obtained by their use. Specific devices are not discussed except as illustrations of the general methods under consideration. The results of such calculations that had been performed up to that time are compiled in Vol. 21 of the Electromagnetic Waves Series, the Waveguide Handbook edited by N. Marcuvitz, and these results are used freely. Although the work of the Radiation Laboratory at MIT was the development of military radar equipment, the principles discussed in this volume can be applied to microwave equipment of all kinds.

Optimised Radar Processors

Mon, 11 Jun 2018 22:35:03 GMT

This book is devoted to the description of optimum signal processing algorithms which can find useful applications in radar systems. The monograph collects about twenty papers written by the Editor and his colleagues. Structurally the collection of the papers is divided into four parts. The first describes the adaptive cancellation techniques of radar clutter; the second part addresses the challenging problem of finding the optimum detection schemes to deal with target and clutter signals having non-Gaussian probability density function, and any type of autocorrelation function. The third group of papers considers the problem of finding the optimum detection schemes for the case of netted multi-static radar systems. The last part is concerned with more general processing techniques used in radar systems for surveillance.

The aim of this text is to provide a theory of radar signal processing at a level which can be useful to practising radar engineers for analysis and design purposes. The relevance and modernity of the topics described ensure that the book can also be used with benefit for specialised graduate courses in communications and electronic engineering at universities and colleges as well as in continuing education courses for graduate employees in industry.

Ferrites at Microwave Frequencies

Mon, 11 Jun 2018 22:16:30 GMT

Between 1950 and 1965, there was a spate of intense activity to investigate the theory and application of ferrite materials at microwave frequencies, and in the early 1960s a number of textbooks on the microwave applications of ferrites were published, but nothing comprehensive since. Now this book has been written to consolidate all the investigations of ferrites for microwave applications, to look back at earlier publications from the viewpoint of a mature technology, and to bring the story up to date. This book attempts to give all the structures and applications using ferrites at microwave frequencies that havebeen investigated or contemplated, using the engineer's rather than the physicist's approach. It starts with a full mathematical treatment of the interaction of an electromagnetic wave with a gyromagnetic ferrite material for simple boundary conditions. These results are then extended to give a field descriptive approach to describe the mode of operation of all the different microwave devices.

Applied Control Theory, 2nd Edition

Mon, 11 Jun 2018 21:09:35 GMT

'To the surprise of some undergraduates, processes do not carry labels marking their variables nor, alas, are they conveniently classified into linear, nonlinear, stochastic, etc., categories. The ability to come to terms with this situation is a prerequisite for anyone proposing to succeed in an industrial environment.' This quotation from Chapter 1 characterises the viewpoint of the book, which is concerned with the application of control theory to real problems in their industrial context.

The book is structured around the following beliefs:

(a) Economic aspects must be considered at an early stage of any project.
(b) Simple techniques and ready-made manufacturer's solutions should be applied wherever possible.
(c) More advanced techniques will be received enthusiastically in those applications where they can offer a genuine contribution.
(d) Control systems using distributed microprocessor power will have an impact that is difficult to exaggerate. Control engineers must become familiar with the concepts involved.
(e) Familiarity with a wide range of applications is indispensable in developing an efficient approach in the field of applied control theory.

This second edition includes new material and supporting references on:

robotics control
programmable logic controllers
self-tuning controllers
distributed computer control systems
biotechnological control

The book should be accessible to a wide variety of engineers. Preferably they should have an elementary knowledge of automatic control theory.

Advances in Command, Control and Communication Systems

Mon, 11 Jun 2018 20:54:06 GMT

This book describes some of the developments in Command, Control and Communication (C3) systems. The topics cover the design of large real-time man-machine systems, which are now a vital area of intensive scientific and financial investment. C3 systems are for complex resource management and planning, and although this has a predominantly military connotation, similar systems are now developing in civil sector applications, public utilities and banking.

Topics discussed include the design and structure of C3 systems, databases, standards, the man-machine interface, and advanced processing, including the sensor data fusion and artificial intelligence. It is the multifaceted nature of C3 that this book seeks to capture. The subject is too vast to survey comprehensively but this text offers the reader an important insight into this critically important aspect of modern technology.