Robert C. Hansen, Robert E. Collin

Small Antenna

• Gebundenes Buch

Produktbeschreibung

Uniquely explains in detail how small antennas work and ways to improve their performance
This book addresses the recent significant theoretical and practical developments in the electrically small antenna (ESA) area. Examining antenna designs that work as well as those that have limitations, it offers the latest information on electromagnetically coupled structures and improving bandwidth using spherical helix dipoles, the exact derivation of Q for electrically small antennas for both TE and TM modes, a new simplified Q formula developed by the authors, and discussions of metamaterials and computer model accuracy for ESA.
The book begins with detailed electromagnetic derivations of Chu and Thal Q formulations, formulas for Q when U or E cores are used, and effects of loss on Q. It also includes a treatise on bandwidth and matching, and Foster's reactance theorem, as well as up-to-date coverage of canonical antennas: dipoles, loops, self-resonant ESA, PIFA, and dielectric resonator antennas.
Just as this book offers the concrete facts on relevant developments in the field, it also clears up confusion regarding findings that have not turned out to be useful. Presented here are antenna ideas that are clever but with performance numbers that are poor, as well as eighteen more antenna ideas that are simply not to be believed. The book concludes with recent data on the use of self-resonant elements in superdirective antennas and new delay line data on superconducting antennas.
Each chapter features extensive references and an author list. In addition, helpful appendices cover a world history of ESA, antenna terms important to ESA, a paper on NIM shells enclosing an ESA dipole, and analytical errors associated with perfect lenses and sub-wavelength focusing. Small Antenna Handbook is ideal for practicing engineers in the telecommunications and national defense areas, as well as for upper-level undergraduate and graduate students.

Produktdetails

• Verlag: Wiley & Sons
• Artikelnr. des Verlages: 14589083000
• 1. Auflage
• Seitenzahl: 360
• Erscheinungstermin: 25. Oktober 2011
• Englisch
• Abmessung: 240mm x 161mm x 24mm
• Gewicht: 640g
• ISBN-13: 9780470890837
• ISBN-10: 0470890835
• Artikelnr.: 33081493

Autorenporträt

Robert C. Hansen, PhD, DEng, has had a long and distinguished career in the aerospace industry. Beginning in 1949, he held key posts in a number of leading aerospace companies, including The Aerospace Corp., STL, Inc. (now TRW), and Hughes Aircraft Co. He is a Fellow of IEEE and IEE and is a member of the National Academy of Engineering. Since 1971, Dr. Hansen has been a consulting engineer for antennas and systems-related problems. The Late Robert Collin, PhD, taught at Case Reserve Western University, where he was chairman of the Department of Electrical Engineering and Applied Physics. He was an invited professor at Pontifical Catholic University of Rio de Janeiro; Telebras Research Center, Brazil; and Beijing University, China. Dr. Collin was the author or coauthor of five books and more than 150 technical papers.

Inhaltsangabe

PREFACE xiii 1. QUALITY FACTORS OF ESA 1 1.1 Introduction
1 1.2 Chu Antenna Q
4 1.3 Collin and Rothschild Q Analysis
8 1.4 Thal Antenna Q
14 1.5 Radian Sphere with Mu and
or Epsilon: TE Modes
16 1.6 Radian Sphere with Mu and
or Epsilon: TM Modes
22 1.7 Effects of Core Losses
28 1.8 Q for Spheroidal Enclosures
34 References
36 2. BANDWIDTH AND MATCHING 39 2.1 Introduction
39 2.2 Foster's Reactance Theorem and Smith Chart
39 2.3 Fano's Matching Limitations
41 2.4 Matching Circuit Loss Magnification
46 2.5 Network and Z0 Matching
48 2.6 Non-Foster Matching Circuits
50 2.7 Matched and High-Z Preamp Monopoles
51 2.7.1 A Short Monopole Matched at One Frequency
52 2.7.2 Short Monopole with High-Impedance Amplifier
54 References
55 3. ELECTRICALLY SMALL ANTENNAS: CANONICAL TYPES 59 3.1 Introduction
59 3.2 Dipole Basic Characteristics
59 3.2.1 Dipole Impedance and Bandwidth
59 3.2.2 Resistive and Reactive Loading
67 3.2.3 Other Loading Configurations
76 3.2.4 Short Flat Resonant Dipoles
78 3.2.5 Spherical Helix Antennas
82 3.2.6 Multiple Resonance Antennas
84 3.2.6.1 Spherical Dipole; Arc Antennas
84 3.2.6.2 Multiple Mode Antennas
86 3.2.6.3 Q Comparisons
87 3.2.7 Evaluation of Moment Method Codes for Electrically Small Antennas
88 3.3 Partial Sleeve, PIFA, and Patch
93 3.3.1 Partial Sleeve
93 3.3.2 PIFA Designs
94 3.3.3 Patch with Permeable Substrate
98 3.4 Loops
101 3.4.1 Air Core Loops, Single and Multiple Turns
101 3.4.2 Permeable Core Loops
107 3.4.3 Receiving Loops
114 3.4.4 Vector Sensor
116 3.5 Dielectric Resonator Antennas
120 References
127 4. CLEVER PHYSICS, BUT BAD NUMBERS 135 4.1 Contrawound Toroidal Helix Antenna
135 4.2 Transmission Line Antennas
138 4.3 Halo, Hula Hoop, and DDRR Antennas
138 4.4 Dielectric-Loaded Antennas
140 4.5 Meanderline Antennas
141 4.6 Cage Monopole
142 References
143 5. PATHOLOGICAL ANTENNAS 147 5.1 Crossed-Field Antenna
147 5.2 Infinite Efficiency Antenna
149 5.3 E-H Antenna
150 5.4 TE-TM Antenna
150 5.5 Crossed Dipoles
151 5.6 Snyder Dipole
152 5.7 Loop-Coupled Loop
155 5.8 Multiarm Dipole
158 5.9 Complementary Pair Antenna
158 5.10 Integrated Antenna
159 5.11 Q 1
4 0 Antenna
160 5.12 Antenna in a NIM Shell
161 5.13 Fractal Antennas
162 5.14 Antenna on a Chip
170 5.15 Random Segment Antennas
171 5.16 Multiple Multipoles
171 5.17 Switched Loop Antennas
173 5.18 Electrically Small Focal Spots
174 5.19 ESA Summary
174 References
175 6. SUPERDIRECTIVE ANTENNAS 181 6.1 History and Motivation
181 6.2 Maximum Directivity
182 6.2.1 Apertures
182 6.2.2 Arrays
183 6.2.2.1 Broadside Arrays of Fixed Spacing
183 6.2.2.2 Endfire Arrays
186 6.2.2.3 Minimization Codes
192 6.2.2.4 Resonant Endfire Arrays
192 6.3 Constrained Superdirectivity
194 6.3.1 Dolph-Chebyshev Superdirectivity
194 6.3.2 Superdirective Ratio Constraint
198 6.3.3 Bandwidth or Q Constraint
200 6.3.4 Phase or Position Adjustment
200 6.3.5 Tolerance Constraint
201 6.4 Bandwidth, Efficiency, and Tolerances
201 6.4.1 Bandwidth
201 6.4.2 Efficiency
205 6.4.3 Tolerances
208 6.5 Miscellaneous Superdirectivity
209 6.6 Superdirective Antenna Summary
210 References
210 7. SUPERCONDUCTING ANTENNAS 215 7.1 Introduction
215 7.2 Superconductivity Concepts for Antenna Engineers
215 7.3 Dipole, Loop, and Patch Antennas
221 7.3.1 Loop and Dipole Antennas
222 7.3.2 Microstrip Antennas
223 7.3.3 Array Antennas
225 7.3.4 Millimeter-Wave Antennas
229 7.3.4.1 Waveguide Flat Plane Array
229 7.3.4.2 Microstrip Planar Array
230 7.3.5 Submillimeter Antennas
232 7.3.6 Low-Temperature Superconducting Antennas
232 7.4 Phasers and Delay Lines
233 7.5 Superconducting Antenna Summary
236 References
236 APPENDIX A A WORLD HISTORY OF ELECTRICALLY SMALL ANTENNAS 243 APPENDIX B DEFINITIONS OF TERMS USEFUL TO ESA 277 APPENDIX C SPHERICAL SHELL OF ENG METAMATERIAL SURROUNDING A DIPOLE ANTENNA 279 APPENDIX D FREQUENCY DISPERSION LIMITS RESOLUTION IN VESELAGO LENS 307 AUTHOR INDEX 335 SUBJECT INDEX 343