Accession Number : AD0772107

Title :   Theoretical Analysis of Impulse Propagation in Dissipative Medium.

Descriptive Note : Technical rept.,

Corporate Author : GEOPHYSICAL SURVEY SYSTEMS INC NORTH BILLERICA MASS

Personal Author(s) : Row,Ron V. ; Morey,Rexford M. ; Bertram,Charles L.

Report Date : MAY 1973

Pagination or Media Count : 85

Abstract : The propagation of a short electromagnetic pulse from an antenna in one medium across a sharp plane interface into a second electrically conducting medium was studied via a model which is based on infinite plane waves. Although general analytical results were obtained numerical computations were necessarily made for a particular pulse shape (Gaussian) and duration (2 nanoseconds) and a limited range of material constants and depths. These results support the qualitative conclusions drawn from the theory and permit estimates of the effects of increasing conductivity and depth on the transmitted pulse shape and amplitude. A few simple experiments with water of various salinity (conductivity) which are reported here also support the conclusions of the theory. It is shown how the effects of a generally stratified medium may be handled in the theory by using transfer matrix multiplication. (Modified author abstract)

Descriptors :   *Electromagnetic radiation, Interfaces, Radar, Propagation, Electromagnetic pulses, Dissipation, Materials, Sea water

Subject Categories : Active & Passive Radar Detection & Equipment
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE