Near field imaging for conducting objects
Resource
Antennas and Propagation Society International Symposium, 1990. AP-S. 'Merging Technologies for the 90's'. Digest.
Journal
Antennas and Propagation Society International Symposium, 1990. AP-S. 'Merging Technologies for the 90's'. Digest
Pages
-
Date Issued
1990-05
Date
1990-05
Author(s)
Li, Hsueh-Jyh
Lin, Feng-Li
DOI
N/A
Abstract
Microwave images of conducting objects obtained from microwave diversity imaging have been interpreted and predicted. The distance between the antennas and the object is assumed in the far-field region, and the equiphase surface is therefore a plane. When the distance between the object and the antennas becomes much shorter than the distance required in the far-field condition, the equiphase surface can no longer be assumed to be a plane. The image might be blurred or distorted if commonly used reconstruction algorithms are applied. Since the equiphase surface is spherical in general, it is reasonable to reconstruct the image through a generalized spherical back-projection method. The authors describe this method and employ it to reconstruct the near-field images of conducting objects. Numerical (6 to 16 GHz) and experimental examples are given.>
Type
journal article
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