• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 17
  • 10
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • Tagged with
  • 34
  • 34
  • 12
  • 7
  • 6
  • 5
  • 5
  • 4
  • 4
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

On the diffraction of acoustic waves by a quarter-plane

Assier, Raphaël Charles January 2012 (has links)
No description available.
2

On the interaction of a transient plane electromagnetic wave with a lossy half-space

Papazoglou, Thales Michael, 1945- January 1972 (has links)
No description available.
3

A method for investigating electromagnetic fields near a plane interface

Pierce, Edwin Patterson, 1934- January 1968 (has links)
No description available.
4

A study of diffraction in the near field of zone plates

Weber, Allen Howard, 1938- January 1962 (has links)
No description available.
5

Electromagnetic diffraction through a square slot into a cavity

Prettie, Clifford William, 1948- January 1972 (has links)
No description available.
6

Attenuation of a shock wave by a single transverse slit

Ostrowski, Paul Perry. January 1975 (has links)
No description available.
7

Studies of ionospheric drift using a large aerial array

Felgate, David Gordon January 1969 (has links)
v, 99 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics, 1970
8

High frequency beam diffraction by apertures and reflectors

Suedan, Gibreel A. January 1987 (has links)
Most solutions for electromagnetic wave diffraction by obstacles and apertures assume plane wave incidence or omnidirectional local sources. Solutions to diffraction problems for local directive sources are needed. The complex source point representation of directive beams together with uniform solutions to high frequency diffraction problems is a powerful combination for this. Here the method is applied to beam diffraction by planar structures with edges, such as the half-plane, slit, strip, wedge and circular aperture. Previously used restrictions to very narrow beams and paraxial regions, are removed here and the range of validity increased. Also it is shown that the complex source point method can give a better approximation to broad antenna beams than the Gaussian function. The solution derived for the half-plane problem is uniform, accurate and valid for all beam orientations. This solution can be used as a reference solution for other uniform or asymptotic solutions and is used to solve for the wide slit and complementary strip problems. Uniform solutions for omidirectional sources are developed and extended analytically to become solutions for directive beams. The uniform theory of diffraction is used to obtain uniform solutions where there are no simple exact solutions, such as for the wedge and circular aperture. Otherwise rigorously correct solutions at high frequencies for singly diffracted far fields are used, such as for the half-plane, slit and strip. The geometrical theory of diffraction and equivalent line currents are used to include interaction between edges. Extensive numerical results including the limiting cases; e.g. plane wave incidence, line and point sources are given. These solutions are compared with previous solutions, wherever possible and good agreement is evident Beam diffraction by a wedge with its edge on the beam axis is analysed. This solution completes a previous asymptotic solution which is infinite on the shadow boundaries and inaccurate in the transition regions. Finally, the diffraction by a circular aperture illuminated by normally incident acoustic beam, is derived and the singularity along the axial caustic is removed using Bessel functions and a closed form expression for multiple diffraction is derived. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate
9

Attenuation of a shock wave by a single transverse slit

Ostrowski, Paul Perry. January 1975 (has links)
No description available.
10

The diffraction at the edge of a uniform impedance surface /

Hwang, Yeong Ming January 1973 (has links)
No description available.

Page generated in 0.091 seconds