Download or read book EM Wave Propagation Analysis in Plasma Covered Radar Absorbing Material written by Hema Singh and published by Springer. This book was released on 2016-08-29 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on EM propagation characteristics within multilayered plasma-dielectric-metallic media. The method used for analysis is impedance transformation method. Plasma covered radar absorbing material is approximated as a multi-layered dielectric medium. The plasma is considered to be bounded homogeneous/inhomogeneous medium. The reflection coefficient and hence return loss is analytically derived. The role of plasma parameters, such as electron density, collision frequency, plasma thickness, and plasma density profile in the absorption behavior of multi-layered plasma-RAM structure is described. This book provides a clearer picture of EM propagation within plasma. The reader will get an insight of plasma parameters that play significant role in deciding the absorption characteristics of plasma covered surfaces.
Download or read book Plasma based Radar Cross Section Reduction written by Hema Singh and published by Springer. This book was released on 2015-09-30 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive review of plasma-based stealth, covering the basics, methods, parametric analysis, and challenges towards the realization of the idea. The concealment of aircraft from radar sources, or stealth, is achieved through shaping, radar absorbing coatings, engineered materials, or plasma, etc. Plasma-based stealth is a radar cross section (RCS) reduction technique associated with the reflection and absorption of incident electromagnetic (EM) waves by the plasma layer surrounding the structure. A plasma cloud covering the aircraft may give rise to other signatures such as thermal, acoustic, infrared, or visual. Thus it is a matter of concern that the RCS reduction by plasma enhances its detectability due to other signatures. This needs a careful approach towards the plasma generation and its EM wave interaction. The book starts with the basics of EM wave interactions with plasma, briefly discuss the methods used to analyze the propagation characteristics of plasma, and its generation. It presents the parametric analysis of propagation behaviour of plasma, and the challenges in the implementation of plasma-based stealth technology. This review serves as a starting point for the graduate and research students, scientists and engineers working in the area of low-observables and stealth technology.
Download or read book Behaviour of Electromagnetic Waves in Different Media and Structures written by Ali Akdagli and published by BoD – Books on Demand. This book was released on 2011-07-05 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume thoroughly covers wave propagation behaviors and computational techniques for electromagnetic waves in different complex media. The chapter authors describe powerful and sophisticated analytic and numerical methods to solve their specific electromagnetic problems for complex media and geometries as well. This book will be of interest to electromagnetics and microwave engineers, physicists and scientists.
Download or read book Analysis of Electromagnetic Wave Propagation in a Magnetized Re Entry Plasma Sheath Via the Kinetic Equation written by Robert M. Manning and published by BiblioGov. This book was released on 2013-07 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a theoretical model of the propagation of electromagnetic waves through a hypersonically induced plasma, it has been demonstrated that the classical radiofrequency communications blackout that is experienced during atmospheric reentry can be mitigated through the appropriate control of an external magnetic field of nominal magnitude. The model is based on the kinetic equation treatment of Vlasov and involves an analytical solution for the electric and magnetic fields within the plasma allowing for a description of the attendant transmission, reflection and absorption coefficients. The ability to transmit through the magnetized plasma is due to the magnetic windows that are created within the plasma via the well-known whistler modes of propagation. The case of 2 GHz transmission through a re-entry plasma is considered. The coefficients are found to be highly sensitive to the prevailing electron density and will thus require a dynamic control mechanism to vary the magnetic field as the plasma evolves through the re-entry phase.
Download or read book Electromagnetic Wave Theory written by J. C. Brown and published by Elsevier. This book was released on 2013-10-22 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Wave Theory, Part 2 contains the proceedings of a Symposium on Electromagnetic Wave Theory held at Delft, The Netherlands in September 1965. The symposium provided a forum for discussing electromagnetic wave theory and tackled a wide range of topics, from propagation in nonlinear media to electromagnetic wave propagation and amplification in solid-state plasmas. Electromagnetic waves in nonlinear transmission lines with active parameters are also considered, along with the phase dependence of maser active material Q-factor on pump intensity and frequency. Comprised of four sections, this volume begins with an analysis of two modes of propagation that are coupled through parametric modulation in nonlinear media. The discussion then turns to symmetry restrictions in nonlinear, non-absorbing, non-dispersive media; nonlinear interaction between two beams of plane electromagnetic waves in an anisotropic medium; radiation in periodically non-stationary media; and electromagnetic wave propagation in time-varying media. Subsequent chapters explore the diffraction of electromagnetic waves by plasma structures; resonant electromagnetic scattering from gyrotropic plasmas; scattering and transmission of electromagnetic waves at a statistically rough boundary between two dielectric media; and developments in wavefront reconstruction. This book will be useful for students, practitioners, and researchers in physics.
Download or read book Analysis of Electromagnetic Wave Propagation in a Magnetized Re Entry Plasma Sheath Via the Kinetic Equation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-20 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a theoretical model of the propagation of electromagnetic waves through a hypersonically induced plasma, it has been demonstrated that the classical radiofrequency communications blackout that is experienced during atmospheric reentry can be mitigated through the appropriate control of an external magnetic field of nominal magnitude. The model is based on the kinetic equation treatment of Vlasov and involves an analytical solution for the electric and magnetic fields within the plasma allowing for a description of the attendant transmission, reflection and absorption coefficients. The ability to transmit through the magnetized plasma is due to the magnetic windows that are created within the plasma via the well-known whistler modes of propagation. The case of 2 GHz transmission through a re-entry plasma is considered. The coefficients are found to be highly sensitive to the prevailing electron density and will thus require a dynamic control mechanism to vary the magnetic field as the plasma evolves through the re-entry phase. Manning, Robert M. Glenn Research Center WAVE PROPAGATION; ELECTROMAGNETIC WAVE TRANSMISSION; RADIO TRANSMISSION; RADIO FREQUENCIES; MICROWAVE TRANSMISSION; ABSORPTIVITY; MAGNETIC FIELDS; COEFFICIENTS; REFLECTANCE
Download or read book Electromagnetic Waves written by Vitaliy Zhurbenko and published by IntechOpen. This book was released on 2011-06-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to various aspects of electromagnetic wave theory and its applications in science and technology. The covered topics include the fundamental physics of electromagnetic waves, theory of electromagnetic wave propagation and scattering, methods of computational analysis, material characterization, electromagnetic properties of plasma, analysis and applications of periodic structures and waveguide components, and finally, the biological effects and medical applications of electromagnetic fields.
Download or read book Electromagnetic Wave Propagation in Unmagnetized Plasmas written by and published by . This book was released on 1992 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report describes an investigation of electromagnetic-wave propagation in unmagnetized plasmas and its application to the reduction of the radar cross section (RCS) of a plasma-filled enclosure. We have demonstrated RCS reduction of 20 to 25 dB with a prototype system at the radar range at Hughes Aircraft's Microwave Products Division in Torrance. The prototype consists of a sealed ceramic enclosure with a microwave reflector and a plasma generator inside it. When the plasma is present, the RCS is significantly reduced over a frequency range of 4 to 14 GHz. As part of the program, we also investigated the basic-plasma-physics issues relating to the absorption and refraction of electromagnetic (EM) waves in collisional plasmas. We demonstrated absorption as high as 63 dB in a section of plasma-loaded C-band rectangular waveguide. We also developed a theoretical model for the plasma cloaking process that includes scattering contributions from the plasma-vacuum interface, partial reflections from the plasma, and collisional absorption in the plasma. The theoretical model is found to be in reasonable agreement with the experimental results and can be used to confidently design future plasma cloaking systems. Plasma Cloaking, RCS Reduction.
Download or read book Analysis of Electromagnetic Wave Propagation in a Magnetized Re entry Plasma Sheath Via the Kinetic Equation written by Robert Michael Manning and published by . This book was released on 2009 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Waves written by Vitaliy Zhurbenko and published by IntechOpen. This book was released on 2011-06-21 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to various aspects of electromagnetic wave theory and its applications in science and technology. The covered topics include the fundamental physics of electromagnetic waves, theory of electromagnetic wave propagation and scattering, methods of computational analysis, material characterization, electromagnetic properties of plasma, analysis and applications of periodic structures and waveguide components, and finally, the biological effects and medical applications of electromagnetic fields.
Download or read book Wave Propagation Scattering And Emission In Complex Media written by Ya-qiu Jin and published by World Scientific. This book was released on 2005-01-26 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains review papers presented at the International Workshop on Wave Propagation, Scattering and Emission on Theory, Experiment, Simulation and Inversion (WPSE). The papers are of high quality, covering broad areas: a new mechanism of interaction of electromagnetic waves with complex media, remote sensing information, computational electromagnetics, etc. This book summarizes the most significant progress in wave propagation, encompassing theory, experiment, simulation, and inversion. It will also serve as a good reference for scientists in future research.List of Foreign Invited Speakers: Henry Bertoni (Brooklyn Polytechnic University), Lawrence Carin (Duke U), Al Chang (NASA, Goddard), Margaret Cheney (Rensselaer Polytech Institute), Weng Chew (U of Illinois at Urbana Champaign), Shane Cloude (AEL Consultants, UK), Adrian Fung (U of Texas at Arlington), Al Gasiewski (Environmental Tech Lab, NOAA), Martti Hallikainen (Helsinki U of Technology), Akira Ishimaru (U of Washington), Magdy Iskander (U of Hawaii), J A Kong (MIT), Roger Lang (George Washington U), Alex Maradudin (U of California at Irvine), Eric Michielssen (U of Illinois at Urbana Champaign), Eni Njoku (Caltech, Jet Propulsion Lab), Carey Rappaport (Northeastern U), Marc Saillard (Institut Fresnel), Kamal Sarabandi (U of Michigan), David R Smith (U of California at San Diego), Mitsuo Tateiba (Kyushu University), George Uslenghi (U of Illinois at Chicago), and Werner Wiesbeck (Karlsruhe U).
Download or read book Radar Absorbing Materials and Microwave Shielding Structures Design written by Davide Micheli and published by LAP Lambert Academic Publishing. This book was released on 2012-02 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on electromagnetic absorbing and shielding properties of multilayer materials. Nanomaterials are widely used and composite materials' dielectric characterization is deeply discussed. Very little academic literature exists on how to model(design) an electromagnetic absorber using matrix formalism of microwave propagation through multilayer materials. This book therefore, provides an interesting approach to the absorber's design in which different branches of science are applied and where all of them are used to optimize the "quasi perfect absorber" nanotechnology, electromagnetic wave propagation theory, composite materials manufacturing, evolutionary computation. With respect to the present literature, the method presented in this book computes the absorbing capability of materials, taking into account for the reflection and transmission coefficients, considering also oblique incidence of the electromagnetic field. Theoretical modeling of absorbers is experimentally validated. At the end of the book the electromagnetic shielding performance of carbon-carbon material and of high weight percentage carbon nanotubes based composite materials are throughly analyzed.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1966 with total page 1432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetic Wave Propagation in Uniaxial Plasmas with Curved Magnetic Field written by Henry J Stalzer (Jr) and published by . This book was released on 1969 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of the curvature of an impressed static magnetic field on the propagation and diffraction of electromagnetic waves in a uniaxial plasma is studied. The model chosen for the analysis is two dimensional with the magnetic field lines consisting of concentric circles. Ray optical techniques are used to construct approximate solutions to the field radiated from a line source in the unbounded medium and one into which a perfectly conducting or a transparent cylinder is introduced. The radiated, reflected, refracted and diffracted fields calculated by ray optics are then validated by obtaining exact integral representations for the solutions to several canonical problems and evaluating these integrals asymptotically for high frequencies. The agreement between the ray optical results and the asymptotic approximations validates the ray optical procedure and suggests its usefulness in obtaining approximate solutions to more general configurations which are not amenable to a rigorous analysis. The center of curvature of the magnetic field lines in the unbounded medium acts as a scatterer and is shown to be analogous to the vertex of a wedge. When cylindrical boundaries are introduced, the diffracted field consists of creeping rays which are excited by rays which are incident either tangentially or at the critical angle. (Author).
