Title :
Near-field imaging for conducting objects
Author :
Li, Hsueh-Jyh ; Lin, Feng-Li
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
5/1/1991 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
