Title:
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A near field spherical wave inverse synthetic aperture radar technique
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Author:
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Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció; Universitat Politècnica de Catalunya. ANTENNALAB - Grup d'Antenes i Sistemes Radio |
Abstract:
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The authors present an imaging near-field spherical wave inverse synthetic aperture radar (SWISAR) algorithm based on a focusing operator of the scattered fields on the target surface. A spherical wave can be easily generated in an anechoic chamber using electrically small and low-cost horn antennas; no reflectors are used, avoiding surface tolerance problems, and diffraction can be minimized with an appropriate horn design. An additional advantage of this algorithm is its ability to account for bistatic measurement geometries and lateral tapers in the spherical wave illumination. A 2-D formulation has been used which is strictly valid for bodies which satisfy far-field conditions in the height dimension, as easily occurs with aircraft. The reconstruction of numerically simulated five point-like objects placed on a radial line for a frequency range of 18 to 26 GHz and an angular scan of 360 degrees is shown. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica -Radar -Microwave imaging -Synthetic aperture radar -Radar |
Rights:
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Document type:
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Article - Published version Conference Object |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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