Title :
Sentinel-1 antenna model validation: Pattern prediction vs. PNFS measurements
Author :
Hees, A. ; Koch, Peter ; Rostan, Friedhelm ; Huchler, Markus ; Croci, R. ; Østergaard, A.
Author_Institution :
Astrium GmbH, Friedrichshafen, Germany
Abstract :
The C-SAR Antenna Subsystem (SAS) of the European Radar Observatory Sentinel-1 is comprised of an active dual-polarized phased array consisting of 280 waveguide subarrays for each polarization. In this paper, the Sentinel-1 Antenna Model along with the PNFS facility used in this conjunction is presented which allows the computation of the far field pattern shapes assigned to the various SAR operational modes designed specifically for the Sentinel-1 mission (e.g. Stripmap, ScanSAR etc.). These calculations are primarily based on embedded subarray near field measurements (active element pattern) serving as inputs to the Antenna Model. Due to the high flexibility of the Antenna Model, it is also highly attractive for other spaceborne SAR missions to come. Anyway, the excellent agreement found between the Antenna Model prediction and the pattern data acquired with the Planar Near Field Scanner Facility (PNFS) located at EADS Astrium GmbH, Germany is demonstrated next.
Keywords :
antenna phased arrays; antenna radiation patterns; electric field measurement; magnetic field measurement; phased array radar; radar antennas; synthetic aperture radar; C-SAR antenna subsystem; EADS Astrium GmbH; European Radar Observatory Sentinel-1 antenna model validation; Germany; PNFS facility; PNFS measurements; SAR operational modes; SAS; ScanSAR; Stripmap; active dual-polarized phased array; active element pattern; embedded subarray near field measurements; far field pattern shape computation; pattern prediction; planar near field scanner facility; waveguide subar- rays; Antenna measurements; Antenna radiation patterns; Gain; Radar antennas; Synthetic aperture radar; Synthetic aperture sonar;
Conference_Titel :
Phased Array Systems & Technology, 2013 IEEE International Symposium on
Conference_Location :
Waltham, MA
DOI :
10.1109/ARRAY.2013.6731898