Antennas

Antenna Toolkit

Antenna Toolkit 2nd Edition
Joseph J. Carr, K4IPV

Newnes
OXFORD AUCKLAND BOSTON JOHANNESBURG MELBOURNE NEW DELHI

Newnes An imprint of Butterworth-Heinemann Linacre House, Jordan Hill, Oxford OX2 8DP 225 Wildwood Avenue, Woburn, MA 01801-2041 A division of Reed Educational and Professional Publishing Ltd A member of the Reed Elsevier plc group First published 1997 Reprinted 1998 Second edition 2001 ß Joseph J. Carr 1997, 2001 All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Rd, London, England W1P 0LP. Applications for the copyright holder’s written permission to reproduce any part of this publication should be addressed to the publishers. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN 0 7506 4947 X

Typeset by Keyword Typesetting Services Ltd Printed in Great Britain by

Contents

Preface

vii 1

1. Radio signals on the move 2. Antenna basics 19

3. Wire, connection, grounds, and all that 4. Marconi and other unbalanced antennas

49 69 87

5. Doublets, dipoles, and other Hertzian antennas 6. Limited space antennas 7. Large loop antennas 8. Wire array antennas 9. Small loop antennas 10. Yagi beam antennas 11. Impedance matching 118

129 153 176 195 203 221

12. Simple antenna instrumentation and measurements 13. Getting a ‘good ground’ 237 Index 249

v

Preface

If you are interested in amateur radio, short-wave listening, scanner monitoring, or any other radio hobby, then you will probably need to know a...