Table of Contents
Preface
Acknowledgements
An Introduction to UWB Antennas
Historical Introduction
What is an Antenna
UWB Antennas
Conclusion
Endnotes
Antennas as Transducers
Bandwidth
Dispersion
Where Energy Goes
Polarization
Antenna Matching
Antennas as Transducers
Endnotes
Antennas as Transformers
Antenna Impedance
Transmission Lines
Transition from Feed Line to Free Space
Impedance Transformation and Matching
Coupling Balanced and Unbalanced Lines
Antennas as Transformers
Endnotes
Antennas as Radiators
Time Domain and Frequency Domain
Maxwell’s Equations
Linear Antennas
Dipole Field
Antennas as Radiators
Endnotes
Antennas as Energy Converters
Motivation
Localization of Electromagnetic Energy
Dipole Field Energy
Optimal Element Design
Fundamental Limits on Antenna Size
Antennas as Energy Converters
Endnotes
A Taxonomy of UWB Antennas
Frequency Independent Antennas
Small Element Electric Antennas
Small Element Magnetic Antennas
Electrically Small Antennas
Horn Antennas
Reflector Antennas
Summary
Endnotes
UWB Antennas in Systems
Antenna Spectral Control
Antenna Efficiency
Antenna Directivity
UWB Antennas in Systems
Endnotes
Conclusion and Summary
Appendix: Energy Around Time Harmonic Dipoles
About the Author
Index
|