Title :
Simultaneous nonlinear inversion of permeability and permittivity in two dimensions using time-domain data
Author :
Moghaddam, M. ; Chew, W.C.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
The authors solve the nonlinear two-dimensional electromagnetic inverse problem, taking into account the spatial variations of permeability as well as those of permittivity. They formulate the problem as a volume integral equation for the scattered field, with scattering contributions from two unknown object functions. The inverse problem is solved by starting from the Born approximations and performing iterations on the integral equation. The forward problem is solved once during each iteration. For the two-unknown-function (permeability and permittivity) problem, the inversion procedure is carried out via a double-criterion optimization. Eight transmitters and eight receivers are used, and several permittivity and permeability profile are reconstructed.<>
Keywords :
electromagnetic field theory; electromagnetic wave scattering; permeability; permittivity; time-domain analysis; forward problem; iterations; nonlinear 2D EM inverse problem; permeability; permittivity; receivers; scattered field; spatial variations; time-domain data; transmitters; volume integral equation; Acoustic scattering; Electromagnetic launching; Electromagnetic scattering; Integral equations; Inverse problems; Laboratories; Partial differential equations; Permeability; Permittivity; Tellurium;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221964
