SAR antenna design for ambiguity and multipath suppression

Author

Christensen, Erik Lintz ; Dich, Mikael

Author_Institution

Electromagn. Inst., Tech. Univ. Denmark, Lyngby, Denmark

fYear

1993

fDate

18-21 Aug 1993

Firstpage

784

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IGARSS.1993.322219

Filename

322219