Electrically Small, Superdirective, and Superconducting Antennas

183 Pages·2006·3.31 MB·English

by  R. C. Hansen

Electrically Small,
Superdirective, and
Superconducting
Antennas
R.C. Hansen
A John Wiley & Sons, Inc., Publication

Electrically Small,
Superdirective, and
Superconducting
Antennas

Electrically Small,
Superdirective, and
Superconducting
Antennas
R.C. Hansen
A John Wiley & Sons, Inc., Publication
Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved
Published by John Wiley & Sons, Inc., Hoboken, New Jersey
Published simultaneously in Canada
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Library of Congress Cataloging-in-Publication Data:
Hansen, Robert C.
Electrically small, superdirective, and superconducting antennas / by R.C. Hansen.
p. cm.
Includes bibliographical references and index.
ISBN-13: 978-0-471-78255-1
ISBN-10: 0-471-78255-6
1. Antennas (Electronics) I. Title.
TK7871.6.H35156 2006
621.382′4—dc22
2005056820
Printed in the United States of America
10 9 8 7 6 5 4 3 2 1
This Book is Dedicated to These Intrepid
Warriors Against Nut-House Antennas
Dick Adler
Jack Belrose
Ben Dawson
Jim Hatfi eld
Larry Hurzon
Rick Ridgley
Books by R. C. Hansen:
Microwave Scanning Antennas (3 volumes)
Signifi cant Phased Array Papers
Geometric Theory of Diffraction
Moment Methods in Antennas and Scattering
Phased Array Antennas
www.rchansen.com
Contents
Preface xi
1. Electrically Small Antennas 1
1.1 Introduction 1
1.2 Fundamental Limitations 1
1.2.1 Wheeler-Chu-McLean 1
1.2.2 Foster’s Reactance Theorem Versus Smith Chart 3
1.2.3 Fano’s Matching Limitations 7
1.3 Electrically Small Antennas: Canonical Types 10
1.3.1 Dipole Basic Characteristics 10
1.3.1.1 Resistive and Reactive Loading 17
1.3.1.2 Other Loading Confi gurations 25
1.3.2 Patch and Partial Sleeve 27
1.3.2.1 Titanate or Metaferrite Substrate 27
1.3.2.2 Partial Sleeve 29
1.3.3 Loop Basic Characteristics 30
1.3.3.1 Air Core Loop 31
1.3.3.2 Multiturn Air Loop 33
1.3.3.3 Magnetic Core Loop 35
1.3.3.4 Receiving Loops 42
1.3.3.5 Vector Sensor 44
1.3.4 Dielectric Resonator Antenna 48
1.4 Clever Physics, but Bad Numbers 54
1.4.1 Contrawound Toroidal Helix Antenna 54
1.4.2 Transmission Line Antennas 55
1.4.3 Halo, Hula Hoop, and DDRR Antennas 57
1.4.4 Dielectric Loaded Antennas 59
1.4.5 Meanderline Antennas 61
1.4.6 Cage Monopole 61
1.5 Pathological Antennas 62
1.5.1 Crossed-Field Antenna 62
1.5.2 Snyder Dipole 64
1.5.3 Loop-Coupled Loop 68
1.5.4 Multiarm Dipole 70
1.5.5 Complementary Pair Antenna 71
1.5.6 Integrated Antenna 72
vii