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The book is devoted to exploring the foundations of the theory of
thin impedance vibrator antennas. The text provides a continuation
of the classic theory of thin perfectly conducting vibrators. Many
consider impedance conception one of the most universal models in
the theory of wave processes, as it informs such a wide spectrum of
uses in solving practical problems of electrodynamics. This topic
provides an opportunity to further search analytical solutions,
allowing a simplification of the mathematical formulation of the
boundary problem. The theory strives to widen the boundaries of the
impedance vibrator antennas application in complex modern
radio-and-electronic systems and devices. The results of much
original research conducted by the authors will be useful for
practicing engineers and designers of antenna and waveguide
systems. The book is written in an academic style, and can be used
to teach students and post graduates about radiotechnical and
radiophysical specialities. The conclusion of the book lists many
actual applied problems, which can provide inspiration for several
potential PhD projects. Topics covered in this book are: *general
questions of the theory of impedance vibrators in the
spatial-frequency representation *electromagnetic waves radiation
by impedance vibrators in free space and material mediums
*electromagnetic waves radiation by impedance vibrators in material
mediums over the perfectly conducting plane *electromagnetic waves
scattering by irregular impedance vibrators in free space
*generalized method of induced electromotive forces for
investigation of the characteristics of impedance vibrators
*radiation of electromagnetic waves by radial impedance vibrators
on the perfectly conducting sphere *electromagnetic waves
scattering by impedance vibrators in the rectangular waveguide
This book discusses the problem of electromagnetic wave excitation
in spatial regions with spherical boundaries and the accurate
mathematical modeling based on numerical and analytical methods to
significantly reduce the time required for developing new antenna
devices. It particularly focuses on elements and systems on mobile
objects of complex shape that are made of new technological
materials. The experimental development of such devices and systems
is an extremely time-consuming, lengthy, and expensive process. The
book is intended for senior and postgraduate students and
researchers working in the fields of radiophysics, radio
engineering and antenna design. The authors assume that readers
understand the basics of vector and tensor analysis, as well as the
general theory of electrodynamics. The original results presented
can be directly used in the development of spherical antennas and
antenna systems for the mobile objects. The book addresses problems
concerning the construction of Green's functions for Hertz
potentials in electrodynamic volumes with spherical boundaries, and
solves these clearly and concisely. It also uses specific examples
to analyze areas where the results could potentially be applied.
The book covers the following topics: * excitation of
electromagnetic fields in coordinate electrodynamic volumes; *
Green's functions for spherical resonators; * Green's functions for
infinite space outside of spherical scatterers; * electromagnetic
fields of dipole radiators on spherical scatterers; *
electromagnetic fields of thin radial impedance vibrators on
perfectly conducting spheres; * electrodynamic characteristics of
narrow slots in spherical surfaces; * multi-element and combined
vibrator-slot radiators on spherical surfaces.
This book discusses the problem of electromagnetic wave excitation
in spatial regions with spherical boundaries and the accurate
mathematical modeling based on numerical and analytical methods to
significantly reduce the time required for developing new antenna
devices. It particularly focuses on elements and systems on mobile
objects of complex shape that are made of new technological
materials. The experimental development of such devices and systems
is an extremely time-consuming, lengthy, and expensive process. The
book is intended for senior and postgraduate students and
researchers working in the fields of radiophysics, radio
engineering and antenna design. The authors assume that readers
understand the basics of vector and tensor analysis, as well as the
general theory of electrodynamics. The original results presented
can be directly used in the development of spherical antennas and
antenna systems for the mobile objects. The book addresses problems
concerning the construction of Green's functions for Hertz
potentials in electrodynamic volumes with spherical boundaries, and
solves these clearly and concisely. It also uses specific examples
to analyze areas where the results could potentially be applied.
The book covers the following topics: * excitation of
electromagnetic fields in coordinate electrodynamic volumes; *
Green's functions for spherical resonators; * Green's functions for
infinite space outside of spherical scatterers; * electromagnetic
fields of dipole radiators on spherical scatterers; *
electromagnetic fields of thin radial impedance vibrators on
perfectly conducting spheres; * electrodynamic characteristics of
narrow slots in spherical surfaces; * multi-element and combined
vibrator-slot radiators on spherical surfaces.
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