

Broadband Microstrip Antennas
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Broadband Microstrip Antennas
Girish Kumar
K. P. Ray
Artech House
Boston • London www.artechhouse.com
Library of Congress Cataloging-in-Publication Data
Kumar, Girish.
Broadband microstrip antennas / Girish Kumar and K.P. Ray. p. cm. — (Artech House antennas and propagation library)
Includes bibliographical references and index. ISBN 1-58053-244-6 (alk. paper)
1. Microstrip antennas. I. Ray, K. P. II. Title.
TK7871.67.M5 K85 |
2003 |
621.382’4—dc21 |
2002033256 |
British Library Cataloguing in Publication Data
Kumar, Girish
Broadband microstrip antennas. — (Artech House antennas and propagation library) 1. Microstrip antennas 2. Broadband communication systems I. Title
II. Ray, K. P. 621.3’824
ISBN 1-58053-244-6
Cover design by Gary Ragaglia
2003 ARTECH HOUSE, INC.
685 Canton Street
Norwood, MA 02062
All rights reserved. Printed and bound in the United States of America. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher.
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International Standard Book Number: 1-58053-244-6
Library of Congress Catalog Card Number: 2002033256
10 9 8 7 6 5 4 3 2 1
To our family members
Contents
|
Foreword |
xvii |
|
Preface |
xix |
|
Acknowledgments |
xxiii |
1 |
An Introduction to Microstrip Antennas |
1 |
1.1 |
Introduction |
1 |
1.2 |
Characteristics of MSAs |
3 |
1.2.1 |
Advantages |
3 |
1.2.2 |
Disadvantages |
3 |
1.2.3 |
Applications of MSAs |
4 |
1.3 |
Feeding Techniques |
4 |
1.4 |
Methods of Analysis |
7 |
1.4.1 |
Transmission Line Model |
8 |
1.4.2 |
Cavity Model |
8 |
1.4.3 |
MNM |
9 |
1.4.4 |
MoM |
9 |
1.4.5 |
FEM |
10 |
vii

viii Broadband Microstrip Antennas
1.4.6 |
SDT |
10 |
1.4.7 |
FDTD Method |
10 |
1.5Review of Various Broadband Techniques for
|
MSAs |
11 |
1.5.1 |
Definition of BW |
11 |
1.5.2 |
Modified Shape Patches |
14 |
1.5.3 |
Planar Multiresonator Configurations |
14 |
1.5.4 |
Multilayer Configurations |
15 |
1.5.5 |
Stacked Multiresonator MSAs |
17 |
1.5.6Impedance-Matching Networks for Broadband
|
MSAs |
17 |
1.5.7 |
Log-Periodic MSA Configurations |
17 |
1.5.8 |
Ferrite Substrate-Based Broadband MSAs |
18 |
1.6 |
Broadband Compact MSAs |
18 |
1.7 |
Tunable and Dual-Band MSAs |
19 |
1.8 |
Broadband Circularly Polarized MSAs |
20 |
1.9 |
Broadband Planar Monopole Antennas |
20 |
1.10 |
Summary |
21 |
|
References |
21 |
2 |
Regularly Shaped Broadband MSAs |
29 |
2.1 |
Introduction |
29 |
2.2 |
RMSAs |
30 |
2.2.1 |
Parametric Study of RMSAs |
39 |
2.2.2 |
Higher Order Modes of RMSA |
52 |
2.2.3 |
Orthogonal Feeds for Dual Polarization |
55 |
2.2.4 |
Circularly Polarized RMSA |
58 |
2.2.5 |
Broadband Suspended RMSA |
58 |
2.2.6 |
Broadband Thick RMSA with Various Probes |
61 |
2.2.7 |
Frequency and Impedance Scaling of RMSA |
63 |
|
Contents |
ix |
2.3 |
CMSAs |
65 |
2.3.1 |
Resonance Frequency |
66 |
2.3.2 |
Input Impedance and Voltage Distribution |
67 |
2.3.3 |
Radiation Pattern |
69 |
2.3.4 |
Effect of Loss Tangent |
69 |
2.3.5 |
Broadband CMSAs |
71 |
2.3.6 |
Analysis of Higher Order Modes |
71 |
2.3.7 |
Circularly Polarized CMSAs |
73 |
2.3.8 |
Dual-Orthogonal Feed CMSAs |
73 |
2.4 |
Semicircular MSAs |
74 |
2.4.1 |
Input Impedance and Voltage Distribution |
75 |
2.4.2 |
Radiation Pattern |
76 |
2.4.3 |
Broadband SCMSAs |
77 |
2.4.4Analysis of Higher Order Modes of the
|
SCMSAs |
78 |
2.5 |
ETMSAs |
79 |
2.6 |
30°-60°-90° Triangular MSAs |
83 |
2.7 |
Annular Ring MSAs |
84 |
2.8Comparison of Various Configurations for
|
Broad BW |
84 |
2.9 |
Summary |
86 |
|
References |
86 |
3 |
Planar Multiresonator Broadband MSAs |
89 |
3.1 |
Introduction |
89 |
3.2Mechanism of Parasitic Coupling for Broad
|
BW |
90 |
3.3 |
Gap-Coupled RMSAs |
90 |
3.3.1 |
Radiating-Edge Gap-Coupled RMSAs |
91 |
3.3.2 |
Nonradiating-Edge Gap-Coupled RMSAs |
102 |