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Spaceborne Reflector SAR Systems with Digital Beamforming

Huber, Sigurd and Younis, Marwan and Krieger, Gerhard and Patyuchenko, Anton and Moreira, Alberto (2012) Spaceborne Reflector SAR Systems with Digital Beamforming. IEEE Transactions on Aerospace and Electronic Systems, 48 (4), pp. 3473-3493.

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Spaceborne Synthetic Aperture Radar (SAR) imaging enters an era where increasingly short revisit times, or large swath widths, respectively, and high spatial resolutions are requested. These requirements impose contradicting constraints on conventional SAR systems using analog beamforming technology. The development for future radar satellites is therefore towards digital beamforming (DBF) systems where the analogous receiver hardware is replaced by digital components. Concerning the SAR antenna the innovative concept of a parabolic mesh reflector in conjunction with a digital feed array is becoming a promising architecture for this new SAR system generation. These antennas, already a mature technique for communication satellites, have the potential to outperform planar array antennas in terms of gain at a moderate hardware effort. This article provides a hardware concept study based on a design in X-band. Focus is put on digital beamforming algorithms adopted to the SAR case and important performance figures are derived.

Document Type:Article
Title:Spaceborne Reflector SAR Systems with Digital Beamforming
AuthorsInstitution or Email of Authors
Krieger, GerhardUNSPECIFIED
Patyuchenko, AntonUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:8 October 2012
Journal or Publication Title:IEEE Transactions on Aerospace and Electronic Systems
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 3473-3493
Keywords:DBF, reflector antennas, SAR
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben hochauflösende Fernerkundungsverfahreen (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Sigurd Huber
Deposited On:30 May 2011 12:05
Last Modified:12 Dec 2013 21:18

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