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Propagation of transient electromagnetic waves in time-varying media - Direct and inverse scattering problems

In English

Författare

Summary, in English

Wave propagation of transient electromagnetic waves in time-varying media

is considered. The medium, which is assumed to be inhomogeneous and dispersive,

lacks invariance under time translations. The spatial variation of

the medium is assumed to be in the depth coordinate, i.e., it is stratified.

The constitutive relations of the medium is a time integral of a generalized

susceptibility kernel and the field. The generalized susceptibility kernel depends

on one spatial and two time coordinates. The concept of wave splitting

is introduced. The direct and inverse scattering problems are solved by the

use of an imbedding or a Green functions approach. The direct and the inverse

scattering problems are solved for a homogeneous semi-infinite medium.

Explicit algorithms are developed. In this inverse scattering problem, a function

depending on two time coordinates is reconstructed. Several numerical

computations illustrate the performance of the algorithms.

Publiceringsår

1994

Språk

Engelska

Publikation/Tidskrift/Serie

Technical Report LUTEDX/(TEAT-7030)/1-26/(1994)

Dokumenttyp

Rapport

Förlag

[Publisher information missing]

Ämne

  • Other Electrical Engineering, Electronic Engineering, Information Engineering
  • Electrical Engineering, Electronic Engineering, Information Engineering

Status

Published

Report number

TEAT-7030

Forskningsgrupp

  • Electromagnetic theory