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Author : John K. Schindler
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Determination of the Electromagnetic Scattering from a Cavity-backed Plane Surface written by John K. Schindler and published by . This book was released on 1964 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John K. Schindler
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (313 download)
Download or read book A Determination of the Electromagnetic Scattering from a Cavity-backed Plane Surface written by John K. Schindler and published by . This book was released on 1972 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: A determination is made of the electromagnetic scattering from an infinite plane surface backed by an infinitely long rectangular cavity. The cavity is coupled through the plane surface by a narrow, infinitely long aperture running parallel to the axis of the cavity. The structure is excited externally by a plane wave of arbitrary polarization and arbitrary angles of incidence. In the formulation given, a pair of singular integral equations governs the behavior of the tangential components of the electric field in the aperture (the aperture fields). The integral equations are solved using a standard perturbation technique under the assumption of a small aperture width in wavelengths. The fields scattered by the structure consist of the superposition of a field specularly reflected from the plane surface and a field reradiated by the induced aperture fields. The spatial distribution of aperture fields is numerically calculated for various cavity dimensions. A simple, approximate technique is outlined for obtaining the component of the aperture field perpendicular to the edge. The results of this technique are briefly compared with the more accurate results obtained from the integral equations. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (317 download)
Download or read book Electromagnetic Scattering Analysis of a Three-dimensional-cavity-backed Aperture in an Infinite Ground Plane Using a Combined Finite Element Method/method of Moments Approach written by and published by . This book was released on 1995 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722199579
Total Pages : 24 pages
Book Rating : 4.1/5 (995 download)
Download or read book Electromagnetic Scattering Analysis of a Three-Dimensional-Cavity-Backed Aperture in an Infinite Ground Plane Using a Combined Finite Element Method/Method of Moments Approach written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combined finite element method/method of moments (FEM/MoM) approach is used to analyze the electromagnetic scattering properties of a three-dimensional-cavity-backed aperture in an infinite ground plane. The FEM is used to formulate the fields inside the cavity, and the MoM (with subdomain bases) in both spectral and spatial domains is used to formulate the fields above the ground plane. Fields in the aperture and the cavity are solved using a system of equations resulting from the combination of the FEM and the MoM. By virtue of the FEM, this combined approach is applicable to all arbitrarily shaped cavities with inhomogeneous material fillings, and because of the subdomain bases used in the MoM, the apertures can be of any arbitrary shape. This approach leads to a partly sparse and partly full symmetric matrix, which is efficiently solved using a biconjugate gradient algorithm. Numerical results are presented to validate the analysis. Reddy, C. J. and Deshpande, Manohar D. and Cockrell, C. R. and Beck, F. B. Langley Research Center RTOP 505-64-70-01...
Author : J. K. Schindler
Publisher :
ISBN 13 :
Total Pages : 188 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Modification of Electromagnetic Scattering Cross Sections in the Resonant Region written by J. K. Schindler and published by . This book was released on 1964 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Some thoughts on scattering cross sections in the resonance region; The minimization of the backscattering of a cylinder by a central loading; Backscatter reduction of long thin bodies by impedance loading; Theoretical and experimental investigation of backscattering from a cavityloaded monopole; Scattering from thick reactively loaded rods; Analysis of loaded terminal scatters; Some bounds to the behavior of small resonant scatterers; A determination of the scattering from a cavity-backed plane surface; Some concepts for reducing reflectivity from antenna apertures; Radar cross section of perfectly conducting dielectric, and dielectrically clad infinite cylinders at arbitrary incidence; Effect of surface diffusivity upon the scattering characteristics of a plasma sphere; Absorption resonance effects in plasma spheres.
Author : C.J. Reddy
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)
Download or read book Electromagnetic Scattering Analysis of a Three-dimensional-cavity-backed Aperture in an Infinite Ground Plane Using a Combined Finite Element Method written by C.J. Reddy and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. R. Cockrell
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (317 download)
Download or read book Electromagnetic Scattering from Arbitrarily Shaped Aperture Backed by Rectangular Cavity Recessed in Infinite Ground Plane written by C. R. Cockrell and published by . This book was released on 1997 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1118 pages
Book Rating : 4.0/5 ( download)
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Smiltens
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Proposed Method for the Determination of the Standard Free Energy of Formation of a Double Oxide by a Mass Spectrometer written by J. Smiltens and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: An equation for determination of the standard free energy of formation of a double oxide by means of a mass spectrometer has been derived. The quantities required by the equation are (1) the ratio of the intensities of an ion and (2) the ratio of the oxygen pressures at two equilibriums involving the double oxide and the constituent oxides. (Author).
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722200022
Total Pages : 28 pages
Book Rating : 4.2/5 ( download)
Download or read book Electromagnetic Scattering from Arbitrarily Shaped Aperture Backed by Rectangular Cavity Recessed in Infinite Ground Plane written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electromagnetic scattering from an arbitrarily shaped aperture backed by a rectangular cavity recessed in an infinite ground plane is analyzed by the integral equation approach. In this approach, the problem is split into two parts: exterior and interior. The electromagnetic fields in the exterior part are obtained from an equivalent magnetic surface current density assumed to be flowing over the aperture and backed by an infinite ground plane. The electromagnetic fields in the interior part are obtained in terms of rectangular cavity modal expansion functions. The modal amplitudes of cavity modes are determined by enforcing the continuity of the electric field across the aperture. The integral equation with the aperture magnetic current density as an unknown is obtained by enforcing the continuity of magnetic fields across the aperture. The integral equation is then solved for the magnetic current density by the method of moments. The electromagnetic scattering properties of an aperture backed by a rectangular cavity are determined from the magnetic current density. Numerical results on the backscatter radar cross-section (RCS) patterns of rectangular apertures backed by rectangular cavities are compared with earlier published results. Also numerical results on the backscatter RCS patterns of a circular aperture backed by a rectangular cavity are presented. Cockrell, C. R. and Beck, Fred B. Langley Research Center RTOP 505-64-52-04...
Author : Heinz J. Fischer
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.3/5 (91 download)
Download or read book Simple High Speed Kinematography of Nanosecond Exposure written by Heinz J. Fischer and published by . This book was released on 1965 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen J. Kahne
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.3/5 (91 download)
Download or read book Feasible Control Computations Using Dynamic Programming written by Stephen J. Kahne and published by . This book was released on 1965 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of Bellman's dynamic programming technique to realistic control problems has generally been precluded by excessive storage requirements inherent in the method. In this paper, the notion of state mobility is described and shown to be valuable in reducing certain classes of dynamic programming calculations to manageable size. The scheme requires one simple calculation at each stage of the process. IN many cases even this calculation may be omitted. It results in the reduction of the range of allowable state variables to be scanned. The amount of reduction varies from problem to problem. A simple example exhibits a fifty percent reduction. This corresponds to a fifty percent reduction in storage requirements for the problem. Reductions of one or two orders of magnitude appear possible for certain classes of problems.
Author : A. Kahan
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.3/5 (91 download)
Download or read book Infrared Lattice Vibrations of Magnesium Stannide written by A. Kahan and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John K. Kennedy
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.3/5 (91 download)
Download or read book Theory of Continuous Zone Refining Via the Zone-transport Method written by John K. Kennedy and published by . This book was released on 1964 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper explains the differences and the reasons for the differences which exist between the theory of the zone-transport system of continuous zone refining as presented by W. G. Pfann and T. Abe. The identity between the mathematical model used to describe the zone-transport system and one of the models used to describe the recently reported matter-transport system is noted. Nondimensional equations for the zone-transport system are presented and the difference between the limit of alpha in the zone-void and zonetransport systems, when L sub e = 0, is correlated. (Author).
Author : Heinz Fischer
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 (91 download)
Download or read book Expansion of Initial High-current Spark Channels written by Heinz Fischer and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Philip Lieberman
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.3/5 (91 download)
Download or read book On the Acoustic Basis of the Perception of Intonation by Linguists written by Philip Lieberman and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter J. Gielisse
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.3/5 (91 download)
Download or read book Infrared Spectra of Crystals written by Peter J. Gielisse and published by . This book was released on 1965 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
