Title :
Advanced digital beamforming concepts for future SAR systems
Author :
Krieger, G. ; Younis, M. ; Gebert, N. ; Huber, S. ; Bordoni, F. ; Patyuchenko, A. ; Moreira, A.
Author_Institution :
Microwaves & Radar Inst., German Aerosp. Center (DLR), Wessling, Germany
Abstract :
This paper reviews advanced multi-channel SAR system concepts for the imaging of wide swaths with high resolution. Several novel system architectures employing both direct radiating arrays and reflector antennas fed by a digital array are introduced and compared to each other with regard to their imaging performance. In addition, innovative SAR imaging modes are proposed which enable the mapping of ultra-wide swaths with high azimuth resolution. The new techniques and technologies have the potential to enhance the imaging performance of future SAR systems by one order of magnitude if compared to state of the art SAR sensors like TerraSAR-X, ALOS, Radarsat-2 or Sentinel-1.
Keywords :
antenna arrays; array signal processing; radar imaging; reflector antennas; synthetic aperture radar; SAR imaging mode; azimuth resolution; digital array; digital beamforming; direct radiating array; multichannel SAR system; reflector antenna; ultra-wide swath; Azimuth; Feeds; Image resolution; Radar imaging; Spaceborne radar; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-9565-8
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2010.5650516
