The effect of spaceborne spotlight SAR antenna beam pointing steered on image quality

Author

Guodong, Wang

Author_Institution

Sch. of Electron. & Inf. Eng., Beijing Jiaotong Univ., China

fYear

2004

fDate

18-21 Aug. 2004

Firstpage

664

Lastpage

668

Abstract

In the condition of beam pointing steered spaceborne spotlight synthetic aperture radar (SAR) antenna model and imaging model are found. The math analysis confirms that beam pointing steered results in echo amplitude being modulated and causes infinite pairs of echoes. So beam pointing steered may deteriorate image quality. Besides, based on the analyses of tradeoff relation of beam pointing steered ratio, spot area azimuth width and image dynamic extension, the fundamental principle of designing beam pointing steered ratio is presented. Finally, point target simulation is given and simulation result tests the validity of theoretical analysis.

Keywords

airborne radar; amplitude modulation; beam steering; mathematical analysis; radar clutter; radar imaging; synthetic aperture radar; SAR antenna model; SAR imaging model; beam point steering; beam pointing steered ratio; dynamic image extension; echo amplitude; image quality; point target simulation; radar imaging; spaceborne spotlight SAR antenna; spot area azimuth width; synthetic aperture radar; Amplitude modulation; Analytical models; Aperture antennas; Azimuth; Image analysis; Image quality; Optical modulation; Radar antennas; Spaceborne radar; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology, 2004. ICMMT 4th International Conference on, Proceedings

Print_ISBN

0-7803-8401-6

Type

conf

DOI

10.1109/ICMMT.2004.1411616

Filename

1411616