THE FAR FIELD OF AN H-POLARIZED LINE SOURCE NEAR THE EDGE OF A PERFECTLY CONDUCTING HALF-PLANE IN THE INTERFACE BETWEEN TWO DIFFERENT MEDIA, WITH APPLICATION TO MIXED-PATH PROPAGATION

1967 ◽  
pp. 233-235
Author(s):  
R.F. MILLAR
Keyword(s):  
Half Plane ◽  
Line Source ◽  
Far Field

Far-field patterns of line sources mounted between four-dielectric substrates

1992 ◽  
Vol 70 (2-3) ◽  
pp. 173-178 ◽  
Author(s):  
Ioanna Diamandi ◽  
Costas Mertzianidis ◽  
John N. Sahalos
Keyword(s):  
Remote Sensing ◽  
Line Source ◽  
Dielectric Substrate ◽  
Microstrip Antennas ◽  
Field Pattern ◽  
Substrate Thickness ◽  
Far Field ◽  
Dielectric Substrates ◽  
Field Patterns ◽  
Far Field Pattern

The far-field pattern characteristics of line sources lying between the slabs of a four-dielectric substrate configuration are presented. The patterns are calculated for several cases of the substrate thickness as well as for several line-source locations. The considerations that are made give useful applications in remote sensing and microstrip antennas.

Moving Load on a Laminated Composite

1974 ◽  
Vol 41 (3) ◽  
pp. 663-667 ◽  
Author(s):  
C. Sve ◽  
G. Herrmann
Keyword(s):  
Dynamic Response ◽  
Half Plane ◽  
Moving Load ◽  
Formal Solution ◽  
Laminated Composite ◽  
Laplace Transforms ◽  
Layered Material ◽  
Effective Stiffness ◽  
Far Field ◽  
Numerical Examples

A solution is presented for the dynamic response of a periodically laminated half plane that consists of alternating layers of two different materials and is subjected to a moving load. The laminations are parallel to the surface of the half plane, and the velocity of the load is steady and supersonic. An effective stiffness theory developed by Sun, Achenbach, and Herrmann is used to model the layered material, and the formal solution is obtained with the aid of Laplace transforms. A far-field solution is constructed with the head-of-the-pulse procedure, and several numerical examples are presented.

scholarly journals The Diffraction of Transient Electro-Magnetic Waves by a Wedge

1958 ◽  
Vol 11 (2) ◽  
pp. 95-103 ◽  
Author(s):  
A. C. Butcher ◽  
J. S. Lowndes
Keyword(s):  
Wave Equation ◽  
Time Dependence ◽  
Half Plane ◽  
Line Source ◽  
Time Dependent ◽  
Dimensional Case ◽  
Two Dimensional ◽  
Electro Magnetic ◽  
Infinite Wedge ◽  
Magnetic Waves

Much of the work on the theory of diffraction by an infinite wedge has been for cases of harmonic time-dependence. Oberhettinger (1) obtained an expression for the Green's function of the wave equation in the two dimensional case of a line source of oscillating current parallel to the edge of a wedge with perfectly conducting walls. Solutions of the time-dependent wave equation have been obtained by Keller and Blank (2), Kay (3) and more recently by Turner (4) who considered the diffraction of a cylindrical pulse by a half plane.

30.—Acoustic Diffraction by an Absorbing Semi-infinite Half Plane in a Moving Fluid

1975 ◽  
Vol 72 (4) ◽  
pp. 337-357 ◽  
Author(s):  
A. D. Rawlins
Keyword(s):  
Fluid Flow ◽  
Half Space ◽  
Half Plane ◽  
Line Source ◽  
Subsonic Flow ◽  
Sound Intensity ◽  
Acoustic Diffraction ◽  
Radiated Sound ◽  
Acoustic Instabilities ◽  
Moving Fluid

SynopsisThe diffraction of a line source of sound by an absorbing semi-infinite half plane in the presence of a fluid flow is examined. It is found that the radiated sound intensity, in the half space in which the source is located, can be considerably reduced by a suitable choice of the absorption parameter. For subsonic flow the system exhibits no acoustic instabilities.

Radiation from a Line Source Adjacent to a Conducting Half Plane

1953 ◽  
Vol 24 (12) ◽  
pp. 1528-1529 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Half Plane ◽  
Line Source

Diffraction of Cylindrical Waves by a Transmissive Half-Plane

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Yusuf Ziya Umul
Keyword(s):  
Half Plane ◽  
Acoustic Waves ◽  
High Frequency ◽  
Line Source ◽  
Geometrical Optics ◽  
Cylindrical Waves ◽  
Uniform Theory Of Diffraction ◽  
The Waves

The scattered acoustic waves by a transmissive half-plane, which is illuminated by a line source, are investigated. The high-frequency diffracted wave expressions are obtained by taking into account a resistive half-screen that is defined in electromagnetics. The uniform diffracted fields are expressed in terms of the Fresnel cylinder functions. The behavior of the waves is compared with the case when the uniform theory of diffraction is considered. The geometrical optics and diffracted fields are examined numerically.

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