Antenna Engineering Using Physical Optics

Antenna Engineering Using Physical Optics
Author: Leo Diaz
Publisher: Artech House Antenna Library
Total Pages: 368
Release: 1996
Genre: Computers
ISBN:
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Spend less time setting up complex antenna design problems and improve the accuracy of your results with this practical new book and software package. It shows you how to combine physical optics modeling techniques with the free space dyadic Green's function to quickly and easily calculate antenna patterns and diffraction from nearby objects, letting your PC do the specialized math for you.

Optical Antennas

Optical Antennas
Author: Mario Agio
Publisher: Cambridge University Press
Total Pages: 481
Release: 2013-01-03
Genre: Science
ISBN: 110701414X
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This consistent and systematic review of recent advances in optical antenna theory and practice brings together leading experts in the fields of electrical engineering, nano-optics and nano-photonics, physical chemistry and nanofabrication. Fundamental concepts and functionalities relevant to optical antennas are explained, together with key principles for optical antenna modelling, design and characterisation. Recognising the tremendous potential of this technology, practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design, near-field optics and field-enhanced spectroscopy into optical antennas, this interdisciplinary book is an indispensable resource for researchers and graduate students in engineering, optics and photonics, physics and chemistry.

Modern Antenna Design

Modern Antenna Design
Author: Thomas A. Milligan
Publisher: John Wiley & Sons
Total Pages: 646
Release: 2005-07-11
Genre: Technology & Engineering
ISBN: 0471457760
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A practical book written for engineers who design and use antennas The author has many years of hands on experience designing antennas that were used in such applications as the Venus and Mars missions of NASA The book covers all important topics of modern antenna design for communications Numerical methods will be included but only as much as are needed for practical applications

Analysis of a Generalized Dual Reflector Antenna System Using Physical Optics

Analysis of a Generalized Dual Reflector Antenna System Using Physical Optics
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Total Pages: 48
Release: 2018-06-30
Genre:
ISBN: 9781722081959
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Reflector antennas are widely used in communication satellite systems because they provide high gain at low cost. Offset-fed single paraboloids and dual reflector offset Cassegrain and Gregorian antennas with multiple focal region feeds provide a simple, blockage-free means of forming multiple, shaped, and isolated beams with low sidelobes. Such antennas are applicable to communications satellite frequency reuse systems and earth stations requiring access to several satellites. While the single offset paraboloid has been the most extensively used configuration for the satellite multiple-beam antenna, the trend toward large apertures requiring minimum scanned beam degradation over the field of view 18 degrees for full earth coverage from geostationary orbit may lead to impractically long focal length and large feed arrays. Dual reflector antennas offer packaging advantages and more degrees of design freedom to improve beam scanning and cross-polarization properties. The Cassegrain and Gregorian antennas are the most commonly used dual reflector antennas. A computer program for calculating the secondary pattern and directivity of a generalized dual reflector antenna system was developed and implemented at LeRC. The theoretical foundation for this program is based on the use of physical optics methodology for describing the induced currents on the sub-reflector and main reflector. The resulting induced currents on the main reflector are integrated to obtain the antenna far-zone electric fields. The computer program is verified with other physical optics programs and with measured antenna patterns. The comparison shows good agreement in far-field sidelobe reproduction and directivity. Acosta, Roberto J. and Lagin, Alan R. Glenn Research Center RTOP 679-40-00...

Engineering Optics

Engineering Optics
Author: Keigo Iizuka
Publisher: Springer Science & Business Media
Total Pages: 497
Release: 2013-11-11
Genre: Science
ISBN: 3662070324
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"Which area do you think I should go into?" or "Which are the areas that have the brightest future?" are questions that are frequently asked by students trying to decide on a field of specialization. My advice has always been to pick any field that combines two or more disciplines such as Nuclear Physics, Biomedical Engineering, Optoelectronics, or even Engineering Optics. With the ever growing complexity of today's science and technology, many a problem can be tackled only with the cooperative effort of more than one discipline. Engineering Optics deals with the engineering aspects of optics, and its main emphasis is on applying the knowledge. of optics to the solution of engineering problems. This book is intended both for the physics student who wants to apply his knowledge of optics to engineering problems and for the engineering student who wants to acquire the basic principles of optics. The material in the book was arranged in an order that would progres sively increase the student's comprehension of the subject. Basic tools and concepts presented in the earlier chapters are then developed more fully and applied in the later chapters. In many instances, the arrangement of the material differs from the true chronological order. The following is intended to provide an overview of the organization of the book. In this book, the theory of the Fourier transforms was used whenever possible because it provides a simple and clear explanation for many phenomena in optics. Complicated mathematics have been com pletely eliminated.

Surface Electromagnetics

Surface Electromagnetics
Author: Fan Yang
Publisher: Cambridge University Press
Total Pages: 489
Release: 2019-06-20
Genre: Science
ISBN: 1108654207
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Written by the leading experts in the field, this text provides systematic coverage of the theory, physics, functional designs, and engineering applications of advanced engineered electromagnetic surfaces. All the essential topics are included, from the fundamental theorems of surface electromagnetics, to analytical models, general sheet transmission conditions (GSTC), metasurface synthesis, and quasi-periodic analysis. A plethora of examples throughout illustrate the practical applications of surface electromagnetics, including gap waveguides, modulated metasurface antennas, transmit arrays, microwave imaging, cloaking, and orbital angular momentum (OAM ) beam generation, allowing readers to develop their own surface electromagnetics-based devices and systems. Enabling a fully comprehensive understanding of surface electromagnetics, this is an invaluable text for researchers, practising engineers and students working in electromagnetics antennas, metasurfaces and optics.

Physical Optics Analysis of Electrically Small Slot-fed Substrate Lens Antennas

Physical Optics Analysis of Electrically Small Slot-fed Substrate Lens Antennas
Author: Joey R. Bray
Publisher:
Total Pages: 0
Release: 1998
Genre:
ISBN:
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With the current explosion of microwave wireless communication systems comes the need to produce low cost miniaturized components. Integrated antennas, such as planar microstrip-fed patches and slots, are a promising means of combining the antenna function with the associated transceiver circuitry. However, these antennas suffer from a bi-directional radiation pattern, power loss via substrate modes, a broad radiation pattern, or a combination of the above. To correct these problems, a dielectric lens of hemispherical shape, or slight variation thereof, can be placed directly upon the planar antenna, forming what is called a Substrate Lens Antenna (SLA). At sub-millimeter-wave frequencies, a SLA becomes unattractive because its diameter is typically larger than a free-space wavelength. Such lenses become heavy, bulky and expensive as the operating frequency is reduced. This thesis investigates electrically small, slot antenna fed, SLAs operating at 10 GHz in an attempt to facilitate the integration of these devices. (Abstract shortened by UMI.).