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Performance Aspects of Large-Deployable Reflector Antennas Based on Surface Deformations Simulated for Tandem-L

Klenk, Patrick and Reimann, Jens and Schwerdt, Marco (2019) Performance Aspects of Large-Deployable Reflector Antennas Based on Surface Deformations Simulated for Tandem-L. European Conference on Antennas and Propagation (EuCAP), 2019-03-31 - 2019-04-05, Kraków, Poland.

Full text not available from this repository.

Abstract

Based upon the needs of the scientific community, the next generation of Earth observation synthetic aperture radar satellites will focus on comparatively longer wavelengths such as L- or even P-band. Due to operational constraints, instruments currently under development will likely be constructed as a phased array antenna feed paired with a large deployable reflector (LDR) / boom assembly. Compared to traditional planar antenna array based instrument designs, this leads to a series of novel challenges which have to be addressed. In this presentation we discuss several LDR performance aspects related to SAR-based Earth observation from low Earth orbits. Based upon the present reference scenario for Tandem-L, a current proposal for a future high performance SAR mission, we find that expected intra-orbit thermo-elastic deformations should have a tolerable impact on the SAR signal after digital beamforming in terms of gain and phase variations. Furthermore, the potential for reflector shaping opens a trade space which has to be carefully assessed.

Item URL in elib:https://elib.dlr.de/122728/
Document Type:Conference or Workshop Item (Speech)
Title:Performance Aspects of Large-Deployable Reflector Antennas Based on Surface Deformations Simulated for Tandem-L
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klenk, PatrickPatrick.Klenk (at) dlr.deUNSPECIFIED
Reimann, Jensjens.reimann (at) dlr.dehttps://orcid.org/0000-0002-0650-9073
Schwerdt, MarcoMarco.Schwerdt (at) dlr.dehttps://orcid.org/0000-0002-0045-3726
Date:5 April 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:antenna radiation patterns, antenna model, antenna pointing, beam stability, defocused, feed failures, feed element failures, digital beamforming, digital beamforming tech-niques, DBF, Earth observation, instrument performance, large-deployable reflector, LDR, MVDR, reflector antennas, mesh reflector antennas, reflector shaping, Synthetic-Aperture Radar, SAR, spaceborne SAR, satellite SAR, thermo-elastic deformation, Tandem-L.
Event Title:European Conference on Antennas and Propagation (EuCAP)
Event Location:Kraków, Poland
Event Type:international Conference
Event Dates:2019-03-31 - 2019-04-05
Organizer:EurAAP
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Klenk, Dr. Patrick
Deposited On:05 Nov 2018 15:17
Last Modified:15 Apr 2019 08:20

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