Electrically Small, Superdirective, and Superconducting Antennas (eBook)

Robert C. Hansen (Autor)

eBook Download: PDF

2006 | 1. Auflage
168 Seiten
John Wiley & Sons (Verlag)
978-0-470-04103-1 (ISBN)

Infos

A seminal reference to electrically small antennas for today's
wireless and Wi-Fi world

This book is dedicated to the challenges posed by electrically
small antennas and their solutions. Electrically small antennas
have characteristics that limit performance: low radiation
resistance, high reactance, low efficiency, narrow bandwidth, and
increased loss in the matching network. Most of these limitations
are shared by two other classes of antennas: superdirective and
superconducting antennas. All three classes of antennas are
thoroughly treated in three interrelated parts:

* Part One, Electrically Small Antennas, begins with a discussion
of the fundamental limitations of bandwidth and matching, then
provides detailed design information on loaded whips and dipoles,
ferrite loops, patches with unusual substrates, and dielectric
resonator antennas. In addition to exploring designs that work, the
author sets forth antenna designs that are based on good physics
yet are poor performers, as well as designs with both poor
underlying physics and poor performance.

* Part Two, Superdirective Antennas, sets forth basic capabilities
and limitations of superdirective antennas, both apertures and
arrays, and investigates bandwidth, efficiency, and tolerances. The
author explores the magnification of intrinsic matching circuit
loss due to a large mismatch and evaluates the recent and promising
non-Foster matching circuits.

* Part Three, Superconducting Antennas, reviews superconductivity
concepts and new principles for dipole, loop, and patch antennas.
The author concludes with a discussion of superconducting delay
lines for wideband phased array steering.

Throughout the book, the author provides readers with a historical
perspective, setting forth what has been investigated, what works,
and what does not. Each part has its own author index and a list of
references to help readers continue their explorations of
particular topics.With the explosive demand for wireless and Wi-Fi,
this seminal reference is essential reading for all antenna
professionals and is recommended as a graduate-level course book.

Autor

R. C. HANSEN, PhD, DEng, is a consulting engineer specializing in antennas and systems-related problems. He is a Fellow of the IEEE and IEE and a member of the National Academy of Engineering. Dr. Hansen has held key posts in leading aerospace organizations, including The Aerospace Corporation, TRW, and Hughes Aircraft Company.

Inhalt

Preface.

1: ELECTRICALLY SMALL ANTENNAS.

1.1 Introduction.

1.2 Fundamental Limitations.

1.3 Electrically Small Antennas: Canonical Types.

1.4 Clever Physics, but Bad Numbers.

1.5 Pathological Antennas.

1.6 ESA Summary.

References.

Index.

2: SUPERDIRECTIVE ANTENNAS.

2.1 History and Motivation.

2.2 Maximum Directivity.

2.3 Constrained Superdirectivity.

2.4 Bandwidth, Efficiency, and Tolerances.

2.5 Miscellaneous Superdirectivity.

2.6 Matching Circuit Loss Magnification.

2.7 Non-Foster Matching Circuits.

2.8 SD Antenna Summary.

References.

Index.

3: SUPERCONDUCTING ANTENNAS.

3.1 Introduction.

3.2 Superconductivity Concepts for Antenna Engineers.

3.3 Dipole, Loop, and Patch Antennas.

3.4 Phasers and Delay Lines.

3.5 SC Antenna Summary.

References.

Subject Index.

Produkt-Details

• Erscheint lt. Verlag: 19.6.2006
• Sprache: englisch
• Themenwelt: Technik ► Elektrotechnik / Energietechnik
• Themenwelt: Technik ► Nachrichtentechnik
• Schlagworte: Antennas & Propagation • Antenne • Electrical & Electronics Engineering • Elektrotechnik u. Elektronik • Sende- u. Empfangseinrichtungen
• ISBN-10: 0-470-04103-X / 047004103X
• ISBN-13: 978-0-470-04103-1 / 9780470041031