Near-field imaging for conducting objects

Author

Li, Hsueh-Jyh ; Lin, Feng-Li

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

39

Issue

5

fYear

1991

fDate

5/1/1991 12:00:00 AM

Firstpage

600

Lastpage

605

Abstract

A spherical back-projection algorithm is proposed to reconstruct near-field microwave images of conducting objects. In this imaging scheme, the object is mounted on a rotating pedestal and its backscattered near field is measured at discrete-frequency steps. Implementation of the method consists of first estimating the spherical projection (or range profile) at each aspect by inverse Fourier transforming the range-corrected scattered near field, and then coherently spherically back-projecting the range profiles into the image plane. The images are interpreted and predicted based on the procedure of the spherical back-projection method, and numerical and experimental results are presented to verify the effectiveness of the proposed algorithm

Keywords

backscatter; electromagnetic wave scattering; microwave imaging; backscattered near field; conducting objects; discrete-frequency steps; inverse Fourier transforming; near-field microwave images; numerical results; range profiles; range-corrected scattered near field; spherical back-projection algorithm; Fourier transforms; Frequency measurement; Image reconstruction; Microwave imaging; Receiving antennas; Reconstruction algorithms; Rotation measurement; Scattering; Surface reconstruction; Tomography;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.81486

Filename

81486