Abstract
A diffraction tomographic (DT) algorithm has been proposed for detecting three-dimensional (3-D) dielectric objects buried in a lossy ground, using electric dipoles or magnetic dipoles as transmitter and receiver, where the air-earth interface has been taken into account and the background is lossy. To derive closed-form reconstruction formulas, an approximate generalized Fourier transform is introduced. Using this algorithm, the locations, shapes, and dielectric properties of buried objects can be well reconstructed under the low-contrast condition, and the objects can be well detected even when the contrast is high. Due to the use of fast Fourier transforms to implement the problem, the proposed algorithm is fast and quite tolerant to the error of measurement data, making it possible to solve realistic problems. Reconstruction examples are given to show the validity of the algorithm.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 42-49 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 50 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2002 |
| Externally published | Yes |
Keywords
- Detection of objects
- Diffraction tomography (DT)
- Generalized Fourier transform
- Green's functions
- Inverse scattering
- Lossy earth
- Sommerfeld integrals
ASJC Scopus subject areas
- Electrical and Electronic Engineering