Study Of Orbital Angular Momentum Radio Beams Based On Uniform Circular Antenna Array

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Study of Orbital Angular Momentum Radio Beams Based on Uniform Circular Antenna Array

Author : Lei Fang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Study of Orbital Angular Momentum Radio Beams Based on Uniform Circular Antenna Array by : Lei Fang

Download or read book Study of Orbital Angular Momentum Radio Beams Based on Uniform Circular Antenna Array written by Lei Fang and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on developing uniform circular antenna arrays (UCAs) for the generation and application of orbital angular momentum (OAM) modes at millimeter-wave (mm-wave). Uniform circular arrays offer the potential of implementing a planar compact solution for emulating a twisted wave. In theory, multiple twisted waves can be multiplexed on one channel to increase communication capacity. In this dissertation, four main efforts have been undertaken to advance OAM designs for radio waves. First, an OAM-UCA factor using the cylindrical coordinate system has been derived and simulated in MATLAB, which can give the correct radiation pattern and phase distribution results in seconds, compared to time-consuming electromagnetic (EM) simulation. The OAM-UCA factor has been verified using the simulated and measured results, which shows its correctness. Secondly, based on the OAM-UCA factor and the intrinsic properties of OAM, a quantitative method to verify the OAM mode purity generated by the UCA has been developed. This capability can provide insight to optimize OAM-UCAs without lengthy design efforts. Thirdly, dipole UCAs have been realized for generating OAM mode 1 and 3 at lower E-band (71 to 76 GHz) by using 0.127 mm thickness FR408 substrate. To improve the radiation gain, patch UCAs on a different packaging material have been realized for generating OAM modes 1, 2 and -3. Finally, 8-patch OAM-UCAs have been fabricated for the demonstration of the OAM radio link at the WiFi band (2.4 GHz).

Electromagnetic Vortices

Author : Zhi Hao Jiang
Publisher : John Wiley & Sons
ISBN 13 : 1119662826
Total Pages : 498 pages
Book Rating : 4.1/5 (196 download)

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Book Synopsis Electromagnetic Vortices by : Zhi Hao Jiang

Download or read book Electromagnetic Vortices written by Zhi Hao Jiang and published by John Wiley & Sons. This book was released on 2021-12-29 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the most recent advances in electromagnetic vortices In Electromagnetic Vortices: Wave Phenomena and Engineering Applications, a team of distinguished researchers delivers a cutting-edge treatment of electromagnetic vortex waves, including their theoretical foundation, related wave properties, and several potentially transformative applications. The book is divided into three parts. The editors first include resources that describe the generation, sorting, and manipulation of vortex waves, as well as descriptions of interesting wave behavior in the infrared and optical regimes with custom-designed nanostructures. They then discuss the generation, multiplexing, and propagation of vortex waves at the microwave and millimeter-wave frequencies. Finally, the selected contributions discuss several representative practical applications of vortex waves from a system perspective. With coverage that incorporates demonstration examples from a wide range of related sub-areas, this essential edited volume also offers: Thorough introductions to the generation of optical vortex beams and transformation optical vortex wave synthesizers Comprehensive explorations of millimeter-wave metasurfaces for high-capacity and broadband generation of vector vortex beams, as well as orbital angular momentum (OAM) detection and its observation in second harmonic generations Practical discussions of microwave SPP circuits and coding metasurfaces for vortex beam generation and OAM-based structured radio beams and their applications In-depth examinations and explorations of OAM multiplexing for wireless communications, wireless power transmission, as well as quantum communications and simulations Perfect for students of wireless communications, antenna/RF design, optical communications, and nanophotonics, Electromagnetic Vortices: Wave Phenomena and Engineering Applications is also an indispensable resource for researchers in academia, at large defense contractors, and in government labs.

Circular Array-Based Radio Frequency OAM Communications

Author : Rui Chen
Publisher : Springer Nature
ISBN 13 : 3031375890
Total Pages : 256 pages
Book Rating : 4.0/5 (313 download)

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Book Synopsis Circular Array-Based Radio Frequency OAM Communications by : Rui Chen

Download or read book Circular Array-Based Radio Frequency OAM Communications written by Rui Chen and published by Springer Nature. This book was released on 2023-11-25 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the modeling and transmission theory of RF OAM communications. The book features the UCA-based RF point-to-point OAM communication system, the UCA-based RF point-to-multipoint OAM wireless backhaul network, the HCCL structure for long-distance OAM transmissions, and the UCA-based joint OAM RadCom scheme. For the UCA-based RF point-to-point OAM communication system, a 2-D ESPRIT-based distance and AoA estimation method is first introduced, followed by an OAM reception scheme including the hybrid mechanical and electronic beam steering with the estimated AoA and the amplitude detection with the estimated distance. The proposed RF OAM communication scheme is extended to the RF OAM-MIMO system equipped with UCCAs. For the UCA-based RF point-to-multipoint OAM wireless backhaul network, an OAM-based multi-user distance and AoA estimation method is introduced, followed by a multi-user OAM preprocessing scheme. At last, the proposed methods are extended to the downlink multi-user OAM-MIMO wireless backhaul system equipped with UCCAs. Moreover, a novel HCCL structure is introduced to realize long-distance OAM transmission. For the UCA-based joint OAM RadCom scheme, an OAM-based 3-D super-resolution position estimation and rotation velocity detection method is introduced, and then the PCRB of the OAM-based estimates and the transmission rate of the integrated system are derived and analyzed. To achieve the best performance trade-off, the transmitted integrated OAM beams is optimized by means of an exhaustive search method. Finally, this book discusses future research directions to inspire further investigation in the field of RF OAM communications from different perspectives.

Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications

Author : Yang Yue
Publisher : MDPI
ISBN 13 : 3039212230
Total Pages : 164 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications by : Yang Yue

Download or read book Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications written by Yang Yue and published by MDPI. This book was released on 2019-09-03 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well-known by now that the angular momentum carried by elementary particles can be categorized as spin angular momentum (SAM) and orbital angular momentum (OAM). In the early 1900s, Poynting recognized that a particle, such as a photon, can carry SAM, which has only two possible states, i.e., clockwise and anticlockwise circular polarization states. However, only fairly recently, in 1992, Allen et al. discovered that photons with helical phase fronts can carry OAM, which has infinite orthogonal states. In the past two decades, the OAM-carrying beam, due to its unique features, has gained increasing interest from many different research communities, including physics, chemistry, and engineering. Its twisted phase front and intensity distribution have enabled a variety of applications, such as micromanipulation, laser beam machining, nonlinear matter interactions, imaging, sensing, quantum cryptography and classical communications. This book aims to explore novel insights of OAM beams. It focuses on state-of-the-art advances in fundamental theories, devices and applications, as well as future perspectives of OAM beams.

Optical Angular Momentum

Author : L. Allen
Publisher : CRC Press
ISBN 13 : 1482269015
Total Pages : 316 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Optical Angular Momentum by : L. Allen

Download or read book Optical Angular Momentum written by L. Allen and published by CRC Press. This book was released on 2016-04-19 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin angular momentum of photons and the associated polarization of light has been known for many years. However, it is only over the last decade or so that physically realizable laboratory light beams have been used to study the orbital angular momentum of light. In many respects, orbital and spin angular momentum behave in a similar manner, but t

Metasurface Holography

Author : Zi-Lan Deng
Publisher : Springer Nature
ISBN 13 : 3031023862
Total Pages : 68 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Metasurface Holography by : Zi-Lan Deng

Download or read book Metasurface Holography written by Zi-Lan Deng and published by Springer Nature. This book was released on 2022-05-31 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The merging of metasurface and holography brings about unprecedented opportunities for versatile manipulation of light in terms of both far-field wavefront and near-field profile. In this book, a brief evolving history from surface plasmon polariton holography to metamaterial holography and finally to metasurface holography is introduced at first. Basic physical mechanisms that govern the phase modulation rules behind metasurface holography design are discussed later. Next, extended functionalities such as arbitrary polarization holography, vectorial holography, full-color holography, and hybrid holography achieved in the metasurface platform are presented. Surface wave and metagrating holography that bridges the on-chip surface wave and free-space wave is also introduced. In the end, we envisage practical applications of high-fidelity 3D holographic display, high-secure encryption, and high capacity digital encoding and also indicate remaining challenges based on metasurface holography.

Reflectarray Antennas

Author : Payam Nayeri
Publisher : John Wiley & Sons
ISBN 13 : 1118846745
Total Pages : 426 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Reflectarray Antennas by : Payam Nayeri

Download or read book Reflectarray Antennas written by Payam Nayeri and published by John Wiley & Sons. This book was released on 2018-02-23 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides engineers with a comprehensive review of the state-of-the-art in reflectarray antenna research and development. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multi-band, multi-beam, contour-beam, beam-scanning, and conformal reflectarray antennas. They provide sufficient coverage of basic reflectarray theory to fully understand reflectarray antenna design and analysis such that the readers can pursue reflectarray research on their own. Throughout the book numerous illustrative design examples including numerical and experimental results are provided. Featuring in-depth theoretical analysis along with practical design examples, em style="mso-bidi-font-style: normal;"Reflectarray Antennas is an excellent text/reference for engineering graduate students, researchers, and engineers in the field of antennas. It belongs on the bookshelves of university libraries, research institutes, and industrial labs and research facilities.

Classical Electrodynamics

Author : Julian Schwinger
Publisher : CRC Press
ISBN 13 : 0429972091
Total Pages : 592 pages
Book Rating : 4.4/5 (299 download)

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Book Synopsis Classical Electrodynamics by : Julian Schwinger

Download or read book Classical Electrodynamics written by Julian Schwinger and published by CRC Press. This book was released on 2019-05-20 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classical Electrodynamics captures Schwinger's inimitable lecturing style, in which everything flows inexorably from what has gone before. Novel elements of the approach include the immediate inference of Maxwell's equations from Coulomb's law and (Galilean) relativity, the use of action and stationary principles, the central role of Green's functions both in statics and dynamics, and, throughout, the integration of mathematics and physics. Thus, physical problems in electrostatics are used to develop the properties of Bessel functions and spherical harmonics. The latter portion of the book is devoted to radiation, with rather complete treatments of synchrotron radiation and diffraction, and the formulation of the mode decomposition for waveguides and scattering. Consequently, the book provides the student with a thorough grounding in electrodynamics in particular, and in classical field theory in general, subjects with enormous practical applications, and which are essential prerequisites for the study of quantum field theory.An essential resource for both physicists and their students, the book includes a ?Reader's Guide,? which describes the major themes in each chapter, suggests a possible path through the book, and identifies topics for inclusion in, and exclusion from, a given course, depending on the instructor's preference. Carefully constructed problems complement the material of the text, and introduce new topics. The book should be of great value to all physicists, from first-year graduate students to senior researchers, and to all those interested in electrodynamics, field theory, and mathematical physics.The text for the graduate classical electrodynamics course was left unfinished upon Julian Schwinger's death in 1994, but was completed by his coauthors, who have brilliantly recreated the excitement of Schwinger's novel approach.

Twisted Photons

Author : Juan P. Torres
Publisher : John Wiley & Sons
ISBN 13 : 3527635378
Total Pages : 393 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Twisted Photons by : Juan P. Torres

Download or read book Twisted Photons written by Juan P. Torres and published by John Wiley & Sons. This book was released on 2011-03-31 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with applications in several areas of science and technology that make use of light which carries orbital angular momentum. In most practical scenarios, the angular momentum can be decomposed into two independent contributions: the spin angular momentum and the orbital angular momentum. The orbital contribution affords a fundamentally new degree of freedom, with fascinating and wide-spread applications. Unlike spin angular momentum, which is associated with the polarization of light, the orbital angular momentum arises as a consequence of the spatial distribution of the intensity and phase of an optical field, even down to the single photon limit. Researchers have begun to appreciate its implications for our understanding of the ways in which light and matter can interact, and its practical potential in different areas of science and technology.

Theory and Applications of Electromagnetic Metamaterials

Author : Fajun Xiao
Publisher : Frontiers Media SA
ISBN 13 : 2889712214
Total Pages : 89 pages
Book Rating : 4.8/5 (897 download)

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Book Synopsis Theory and Applications of Electromagnetic Metamaterials by : Fajun Xiao

Download or read book Theory and Applications of Electromagnetic Metamaterials written by Fajun Xiao and published by Frontiers Media SA. This book was released on 2021-10-01 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Radiative Processes in Astrophysics

Author : George B. Rybicki
Publisher : John Wiley & Sons
ISBN 13 : 352761818X
Total Pages : 400 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Radiative Processes in Astrophysics by : George B. Rybicki

Download or read book Radiative Processes in Astrophysics written by George B. Rybicki and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiative Processes in Astrophysics: This clear, straightforward, and fundamental introduction is designed to present-from a physicist's point of view-radiation processes and their applications to astrophysical phenomena and space science. It covers such topics as radiative transfer theory, relativistic covariance and kinematics, bremsstrahlung radiation, synchrotron radiation, Compton scattering, some plasma effects, and radiative transitions in atoms. Discussion begins with first principles, physically motivating and deriving all results rather than merely presenting finished formulae. However, a reasonably good physics background (introductory quantum mechanics, intermediate electromagnetic theory, special relativity, and some statistical mechanics) is required. Much of this prerequisite material is provided by brief reviews, making the book a self-contained reference for workers in the field as well as the ideal text for senior or first-year graduate students of astronomy, astrophysics, and related physics courses. Radiative Processes in Astrophysics also contains about 75 problems, with solutions, illustrating applications of the material and methods for calculating results. This important and integral section emphasizes physical intuition by presenting important results that are used throughout the main text; it is here that most of the practical astrophysical applications become apparent.

Toeplitz and Circulant Matrices

Author : Robert M. Gray
Publisher : Now Publishers Inc
ISBN 13 : 1933019239
Total Pages : 105 pages
Book Rating : 4.9/5 (33 download)

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Book Synopsis Toeplitz and Circulant Matrices by : Robert M. Gray

Download or read book Toeplitz and Circulant Matrices written by Robert M. Gray and published by Now Publishers Inc. This book was released on 2006 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental theorems on the asymptotic behavior of eigenvalues, inverses, and products of banded Toeplitz matrices and Toeplitz matrices with absolutely summable elements are derived in a tutorial manner. Mathematical elegance and generality are sacrificed for conceptual simplicity and insight in the hope of making these results available to engineers lacking either the background or endurance to attack the mathematical literature on the subject. By limiting the generality of the matrices considered, the essential ideas and results can be conveyed in a more intuitive manner without the mathematical machinery required for the most general cases. As an application the results are applied to the study of the covariance matrices and their factors of linear models of discrete time random processes. The fundamental theorems on the asymptotic behavior of eigenvalues, inverses, and products of banded Toeplitz matrices and Toeplitz matrices with absolutely summable elements are derived in a tutorial manner. Mathematical elegance and generality are sacrificed for conceptual simplicity and insight in the hope of making these results available to engineers lacking either the background or endurance to attack the mathematical literature on the subject. By limiting the generality of the matrices considered, the essential ideas and results can be conveyed in a more intuitive manner without the mathematical machinery required for the most general cases. As an application the results are applied to the study of the covariance matrices and their factors of linear models of discrete time random processes.

The Physics of Quantum Mechanics

Author : James Binney
Publisher : Oxford University Press, USA
ISBN 13 : 0199688575
Total Pages : 408 pages
Book Rating : 4.1/5 (996 download)

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Book Synopsis The Physics of Quantum Mechanics by : James Binney

Download or read book The Physics of Quantum Mechanics written by James Binney and published by Oxford University Press, USA. This book was released on 2013-12 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title gives students a good understanding of how quantum mechanics describes the material world. The text stresses the continuity between the quantum world and the classical world, which is merely an approximation to the quantum world.

Recent Microwave Technologies

Author : Ahmed Kishk
Publisher : BoD – Books on Demand
ISBN 13 : 1803559276
Total Pages : 348 pages
Book Rating : 4.8/5 (35 download)

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Book Synopsis Recent Microwave Technologies by : Ahmed Kishk

Download or read book Recent Microwave Technologies written by Ahmed Kishk and published by BoD – Books on Demand. This book was released on 2022-08-25 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave bands range from 300 MHz to 300 GHz of the electromagnetic spectrum. These signals can be used in communication, networking, astronomy, and biomedical engineering, among other fields. This book provides a comprehensive overview of the physics of microwave signals, techniques for modeling these signals, uses of these signals in various fields, and the underlying principles of some of the latest microwave devices currently available.

Conservation Laws And Open Questions Of Classical Electrodynamics

Author : Ribaric Marijan
Publisher : World Scientific
ISBN 13 : 9814525405
Total Pages : 349 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis Conservation Laws And Open Questions Of Classical Electrodynamics by : Ribaric Marijan

Download or read book Conservation Laws And Open Questions Of Classical Electrodynamics written by Ribaric Marijan and published by World Scientific. This book was released on 1990-04-02 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: The monograph reflects the current standard of knowledge about the open questions considered, taking care to collect and collate all the revelant ideas, facts and formulae which have been until now widely scattered throughout the literature. For the first time, these aspects are collated in book form. Care is taken to clarify the issues, give a systematic collection of conditions which prospective solutions of these open questions have to meet, and gather and collate various useful theoretical concepts and results.

Electromagnetic Vortices

Author : Zhi Hao Jiang
Publisher : John Wiley & Sons
ISBN 13 : 1119662877
Total Pages : 498 pages
Book Rating : 4.1/5 (196 download)

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Book Synopsis Electromagnetic Vortices by : Zhi Hao Jiang

Download or read book Electromagnetic Vortices written by Zhi Hao Jiang and published by John Wiley & Sons. This book was released on 2021-12-09 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the most recent advances in electromagnetic vortices In Electromagnetic Vortices: Wave Phenomena and Engineering Applications, a team of distinguished researchers delivers a cutting-edge treatment of electromagnetic vortex waves, including their theoretical foundation, related wave properties, and several potentially transformative applications. The book is divided into three parts. The editors first include resources that describe the generation, sorting, and manipulation of vortex waves, as well as descriptions of interesting wave behavior in the infrared and optical regimes with custom-designed nanostructures. They then discuss the generation, multiplexing, and propagation of vortex waves at the microwave and millimeter-wave frequencies. Finally, the selected contributions discuss several representative practical applications of vortex waves from a system perspective. With coverage that incorporates demonstration examples from a wide range of related sub-areas, this essential edited volume also offers: Thorough introductions to the generation of optical vortex beams and transformation optical vortex wave synthesizers Comprehensive explorations of millimeter-wave metasurfaces for high-capacity and broadband generation of vector vortex beams, as well as orbital angular momentum (OAM) detection and its observation in second harmonic generations Practical discussions of microwave SPP circuits and coding metasurfaces for vortex beam generation and OAM-based structured radio beams and their applications In-depth examinations and explorations of OAM multiplexing for wireless communications, wireless power transmission, as well as quantum communications and simulations Perfect for students of wireless communications, antenna/RF design, optical communications, and nanophotonics, Electromagnetic Vortices: Wave Phenomena and Engineering Applications is also an indispensable resource for researchers in academia, at large defense contractors, and in government labs.

IoT as a Service

Author : Bo Li
Publisher : Springer Nature
ISBN 13 : 3030447510
Total Pages : 654 pages
Book Rating : 4.0/5 (34 download)

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Book Synopsis IoT as a Service by : Bo Li

Download or read book IoT as a Service written by Bo Li and published by Springer Nature. This book was released on 2020-03-31 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed post-conference proceedings of the Fifth International Conference on IoT as a Service, IoTaaS 2019, which took place in Xi’an, China, in November 2019. The 54 revised full papers were carefully reviewed and selected from 106 submissions. The papers contribute to the discussion on the challenges posed by Internet of Things (Io). The two technical tracks and three workshops deal in detail: Networking and Communications Technologies for IoT, IoT as a service, International Workshop on Edge Intelligence and Computing for IoT Communications and Applications, International Workshop on Wireless Automated Networking for Internet of Things, and International Workshop on Ubiquitous Services Transmission for Internet of Things.