Multi-Dimensional Airborne SAR Imaging at 94 GHz

In this paper we present multi-dimensional SAR measurements performed with the Fraunhofer FHR MIRANDA-94 system. MIRANDA-94 is a beam-stabilized multichannel frequency modulated continuous wave (FMCW) radar with up to 3 GHz radar bandwidth at 94 GHz center frequency with a dual polarized receive ant...

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Bibliographic Details
Published in:	2024 International Radar Symposium (IRS) pp. 373 - 378
Main Authors:	Caris, Michael, Palm, Stephan, Sieger, Stefan
Format:	Conference Proceeding
Language:	English
Published:	Warsaw University of Technology 02-07-2024
Subjects:	Bandwidth Chirp modulation FMCW Frequency modulation Imaging mm-Wave multi-aspect multi-dimensional polarimetry Radar Radar imaging Receiving antennas SAR W-band
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Summary:	In this paper we present multi-dimensional SAR measurements performed with the Fraunhofer FHR MIRANDA-94 system. MIRANDA-94 is a beam-stabilized multichannel frequency modulated continuous wave (FMCW) radar with up to 3 GHz radar bandwidth at 94 GHz center frequency with a dual polarized receive antenna. In this paper we focus on high resolution multi-aspect and multi-polarization data acquired on linear and circular trajectories. Our analysis showed, that the information about objects can be enhanced and that the aspect angle at which a target is illuminated has a strong influence on the backscattered radiation. In addition, circular SAR (CSAR) allows the fusion of different aspect angles in one imaging process and thus the indication of near-time changes and the replacement of shadow areas with information from other aspect angles.
ISSN:	2155-5753