Accession Number : AD0695828

Title :   INVESTIGATIONS IN THE THEORY OF ELECTROMAGNETIC SCATTERING FROM EXPANDING DIELECTRIC OBSTACLES.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA ANTENNA LAB

Personal Author(s) : Pogorzelski,Roland J.

Report Date : AUG 1969

Pagination or Media Count : 100

Abstract : An equation for the reflection which results when an expanding dielectric slab scatters normally incident plane electromagnetic waves is derived using the invariant imbedding concept. The equation is solved approximately and the character of the solution is investigated. Also, an equation for the radiation transmitted through such a slab is similarly obtained. An alternative formulation of the slab problem is presented which is applicable to the analogous problem in spherical geometry. The form of an equation for the modal reflections from a nonrelativistically expanding sphere is obtained and some salient features of the solution are described. In all cases the material is assumed to be a nondispersive, nonmagnetic dielectric whose rest frame properties are slowly varying. (Author)

Descriptors :   (*ELECTROMAGNETIC RADIATION, SCATTERING), ELECTROMAGNETIC WAVE REFLECTIONS, RADAR CROSS SECTIONS, SHOCK WAVES, IONOSPHERE, INTERFACES, THESES

Subject Categories : Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE