Author: A. T. de HoopPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Diffraction of a Plane Electromagnetic Wave by a Semi-infinite Parallel-plate Waveguide
Author: A. T. de HoopThe Diffraction of Electromagnetic Waves by Dielectric Steps in Waveguides
Author: Erlind G. RoyerPublisher:
ISBN:
Category : Dielectric wave guides
Languages : en
Pages : 96
Book Description
The problem of determining the scattered electromagnetic fields when a dielectric step discontinuity is placed in a waveguide is considered here. The case of a dielectric step which is semi-infinite in extent is presented first. Althouth an exact method of solution is not known at this time, it is shown that the recently introduced modified residue calculus technique can be successfully extended to obtain a very accurate approximate solution of the semi-infinite dielectric step. A unique advantage of this method of solution is that the degree of accuracy obtained is independent of the relative permittivity of the dielectric material and of the frequency. Thus, very high permittivities of frequencies can be considered without an attendant increase in computational complexity. Numerical data are presented which confirm the accuracy of the solutions obtained. The accurate determination of the total field is easily accomplished using the method of this study and is demonstrated. A further extension of the modified residue calculus method yields the approximate solution for the case of a finite dielectric step. This extension also enjoys the advantages mentioned above. The phase shifting abilities of the finite step are demonstrated by calculations which show the effects of varying the step height and the step length. (Author).
Diffraction by a Perfectly Conducting Semi-infinite Screen in an Anisotropic Plasma
Author: S. R. SESHADRIPublisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
The scattering of a plane electromagnetic wave by a perfectly conducting semi-infinite screen embedded in a homogeneous plasma is investigated. A uniform magnetic field is assumed to be impressed externally in a direction parallel to the edge of the half-plane. The plasma is idealized by a dielectric characterized by a tensor dielectric constant. The direction of the incident wave is assumed to be in a plane perpendicular to that of the screen. This vector problem is separable into two equivalent scalar problems for which either the electric or the magnetic vector is parallel to the edge of the half-plane. It is found that for the case of the E-mode, the magnetic vector parallel to the edge of the halfplane satisfies a simple wave-equation and a new type of impedance boundary condition on the screen. This problem is formulated in terms of an integral equation which specifies the current induced on the screen. The integral equation is of the Wiener-Hopf type and is solved by the usual function-theoretic methods. A surface wave is found to exist for one orientation of the external magnetic field and the characteristics of this surface wave are determined. (Author).
Electromagnetic Radiation, Scattering, and Diffraction
Author: Prabhakar H. PathakPublisher: John Wiley & Sons
ISBN: 1119810515
Category : Science
Languages : en
Pages : 1156
Book Description
Electromagnetic Radiation, Scattering, and Diffraction Discover a graduate-level text for students specializing in electromagnetic wave radiation, scattering, and diffraction for engineering applications In Electromagnetic Radiation, Scattering and Diffraction, distinguished authors Drs. Prabhakar H. Pathak and Robert J. Burkholder deliver a thorough exploration of the behavior of electromagnetic fields in radiation, scattering, and guided wave environments. The book tackles its subject from first principles and includes coverage of low and high frequencies. It stresses physical interpretations of the electromagnetic wave phenomena along with their underlying mathematics. The authors emphasize fundamental principles and provide numerous examples to illustrate the concepts contained within. Students with a limited undergraduate electromagnetic background will rapidly and systematically advance their understanding of electromagnetic wave theory until they can complete useful and important graduate-level work on electromagnetic wave problems. Electromagnetic Radiation, Scattering and Diffraction also serves as a practical companion for students trying to simulate problems with commercial EM software and trying to better interpret their results. Readers will also benefit from the breadth and depth of topics, such as: Basic equations governing all electromagnetic (EM) phenomena at macroscopic scales are presented systematically. Stationary and relativistic moving boundary conditions are developed. Waves in planar multilayered isotropic and anisotropic media are analyzed. EM theorems are introduced and applied to a variety of useful antenna problems. Modal techniques are presented for analyzing guided wave and periodic structures. Potential theory and Green's function methods are developed to treat interior and exterior EM problems. Asymptotic High Frequency methods are developed for evaluating radiation Integrals to extract ray fields. Edge and surface diffracted ray fields, as well as surface, leaky and lateral wave fields are obtained. A collective ray analysis for finite conformal antenna phased arrays is developed. EM beams are introduced and provide useful basis functions. Integral equations and their numerical solutions via the method of moments are developed. The fast multipole method is presented. Low frequency breakdown is studied. Characteristic modes are discussed. Perfect for graduate students studying electromagnetic theory, Electromagnetic Radiation, Scattering, and Diffraction is an invaluable resource for professional electromagnetic engineers and researchers working in this area.
Aperture Antennas and Diffraction Theory
Author: Edward V. JullPublisher: IET
ISBN: 9780906048528
Category : Science
Languages : en
Pages : 194
Book Description
Two alternative methods of aperture antenna analysis are described in this book.
Transform Methods for Solving Partial Differential Equations
Author: Dean G. DuffyPublisher: CRC Press
ISBN: 1420035142
Category : Mathematics
Languages : en
Pages : 727
Book Description
Transform methods provide a bridge between the commonly used method of separation of variables and numerical techniques for solving linear partial differential equations. While in some ways similar to separation of variables, transform methods can be effective for a wider class of problems. Even when the inverse of the transform cannot be found ana
A High Frequency Analysis of Electromagnetic Plane Wave Scattering by Perfectly-conducting Semi-infinite Parallel Plate and Rectangular Waveguides with Absorber Coated Inner Walls
Author: Noh Hoon MyungPublisher:
ISBN:
Category : Electromagnetic waves
Languages : en
Pages : 392
Book Description
Geometrical Theory of Diffraction for Electromagnetic Waves
Author: Graeme L. JamesPublisher: IET
ISBN: 9780863410628
Category : Science
Languages : en
Pages : 312
Book Description
The purpose of the book, apart from expounding the Geometrical Theory of Diffraction (GTD) method, is to present useful formulations that can be readily applied to solve practical engineering problems.
The TEM Radiation Pattern of a Thin-walled Parallel-plate Waveguide Analyzed by a Surface Integration Technique
Author: D. C. F. WuPublisher:
ISBN:
Category : Antennas (Electronics)
Languages : en
Pages : 60
Book Description
On the Diffraction of Plane Electromagnetic Waves by an Infinite Slit
Author: Robert Joseph SpahnPublisher:
ISBN:
Category : Diffraction
Languages : en
Pages : 114
Book Description