cation Data A catalogue record for this book is available from the British Library ISBN 0 7506 56123 CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) cdmaOneTM is a registered trademark of the CDMA Development Group Bluetooth TM is a trademark owned by Bluetooth SIG, Inc. For information on all Newnes publications visit our website at www.newnespress.com Composition by Genesis Typesetting Limited, Rochester, Kent Printed and bound in Great Britain Contents Preface 1 An introduction to radio 2 Radio waves and propagation 3 Modulation 4 Antenna systems 5 Receivers 6 Transmitters 7 Broadcasting 8 Satellites 9 Private mobile radio 10 Cellular telecommunications 11 Short-range wireless data communications Index Preface Radio technology is a fascinating subject that encompasses an enormous number of topics. In recent years its importance has risen tremendously. Originally its uses were restricted and normally licences were required. Now it is regulated less and with the widespread use of cellular telephones, wireless local area networks and much more, it is used in a far wider range of applications. The aim of this book is first to provide a grounding in the principles that underpin radio, and then to provide understandable introductions to various radio applications from broadcasting to satellites and cellular telecommunications to wireless local area networks. Many of the basic principles have been long established, but the new technologies are advancing at a tremendous rate. Possibly the fastest changing area is that of cellular telecommunications The first main systems started to appear in the 1980s. During the 1980s their use was restricted mainly to businesses as the costs of owning and using these phones was high. However, this has all changed and they are widely used across sectors of business and society. It is the aim of this book to look at today's latest technologies SO that the reader is able to gain a good appreciation of what is actually being used now. In prepa