A Novel High-Resolution and Wide-Swath SAR Imaging Mode Using Frequency Diverse Planar Array
Konferenz: EUSAR 2021 - 13th European Conference on Synthetic Aperture Radar
29.03.2021 - 01.04.2021 in online
Tagungsband: EUSAR 2021
Seiten: 5Sprache: EnglischTyp: PDF
Zhou, Yashi; Chen, Zhen; Zhao, Qingchao (Department of Space Microwave Remote Sensing Systems, Institute of Electronics, Chinese Academy of Science, China & School of Electronics, Electrical and Communication Engineering, University of Chinese Academy of Science, China)
Wang, Wei; Deng, Yunkai; Wang, Robert (Department of Space Microwave Remote Sensing Systems, Institute of Electronics, Chinese Academy of Science, China)
According to the spatial angle difference of each ambiguity component, the current technical approach of ambiguity suppression is designing the spatial filter for achieving HRWS imaging. However, unlike the traditional phased array, frequency diverse array (FDA) employs a small frequency increment across the whole array elements and forms the range-angle-dependent S-shaped transmit beampattern. Considering the characteristics above and the range periodicity problem of beampattern, this paper devises a scheme for spaceborne HRWS imaging mode by utilizing two-dimensional planar array, i.e., the FDA in azimuth and the conventional phased array in elevation. Simulation results have been presented to validate the effectiveness of the proposed scheme.