Digital Beamforming Features in Subaperture Antenna Arrays of Highly Informative Space Radars with Aperture Synthesis
https://doi.org/10.35596/1729-7648-2023-21-6-70-74
Abstract
It is shown that during digital beamforming in a subaperture antenna array of highly informative space radars with synthetic aperture, it is necessary to provide a procedure for equalizing the time delays of the subaperture output signals for transmission and reception. It has been established that losses in the signal-to-noise ratio on a radar image of a point target for a typical aperture size at an elevation angle of 0.7 m and a signal spectrum width of 600 MHz reach 2.1 and 7.5 dB for off-nadir angles of 21° and 50°, respectively. Recommendations are formulated for equalizing time delays for transmission and reception based on spectral processing. Simulation results are presented.
About the Authors
S. V. Kozlov
Belarusian State University of Informatics and Radioelectronics
Belarus
Belarus
Sergei V. Kozlov, Dr. of Sci. (Tech.), Professor, Professor at Information Radioengineering Department
Minsk
V. V. Radionovich
Belarusian State University of Informatics and Radioelectronics
Belarus
Belarus
Radionovich Vladislav Valer’evich, Postgraduate at Information Radioengineering Department
220013, Minsk, P. Brovki St., 6
Tel.: +375 17 293-88-17
References
1. Alekseeva A. M., Lepehina T. M., Pol V. G. (2022) On the Construction of Active Phased Array Antennas for High-Resolution Synthetic Aperture Space Radars. Bulletin of the “Scientific and Production Organization named after S. A. Lavochkin”. (1), 44–50.
2. Kozlov S. V., Loban M. A., Radionovich V. V. (2021) Digital Beamforming with Compensation of Interfering Radiation Sources in Large-Aperture Antenna Arrays and Broadband Sensing. News Science and Technologies. (3), 14–22.
Review
For citations:
Kozlov S.V., Radionovich V.V. Digital Beamforming Features in Subaperture Antenna Arrays of Highly Informative Space Radars with Aperture Synthesis. Doklady BGUIR. 2023;21(6):70-74. (In Russ.) https://doi.org/10.35596/1729-7648-2023-21-6-70-74
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