Title :
SAR antenna design for ambiguity and multipath suppression
Author :
Christensen, Erik Lintz ; Dich, Mikael
Author_Institution :
Electromagn. Inst., Tech. Univ. Denmark, Lyngby, Denmark
Abstract :
A high resolution airborne synthetic aperture radar (SAR) has been developed at the Electromagnetics Institute (EMI) for remote sensing applications. The paper considers the radiation of antennas for a SAR system from a systems perspective. The basic specifications of an idealised antenna are obtained from the required swath and the azimuth footprint needed for the SAR processing. The radiation from a real antenna causes unwanted signal returns that lead to intensity variations (multipath) and ghost echoes (ambiguity). Additional specifications are deduced by considering these signals. The requirements are illustrated by examples from a realised dual polarised antenna for a C-band SAR
Keywords :
antenna radiation patterns; interference suppression; radar antennas; radar interference; remote sensing by radar; synthetic aperture radar; C-band; SAR antenna design; ambiguity; azimuth footprint; dual polarised antenna; ghost echoes; high resolution airborne synthetic aperture radar; idealised antenna; intensity variations; multipath suppression; radiation; remote sensing applications; swath; unwanted signal returns; Adaptive arrays; Aircraft; Antenna radiation patterns; Azimuth; Doppler shift; Electromagnetics; Radar antennas; Radar tracking; Synthetic aperture radar; Target tracking;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International
Conference_Location :
Tokyo
Print_ISBN :
0-7803-1240-6
DOI :
10.1109/IGARSS.1993.322219
