A Method for Estimating the Changes in the Directions of the Main Maxima of the Directional Pattern of a Multibeam Antenna in the Problem of Passive Direction Finding

We propose a method for calculating the displacements of the main maxima of the directional-pattern beams of a reflectory multibeam antenna, which are related to the reflector deformation, and estimate its accuracy. To describe the deformation, we use the model of the displaced and rotated reflector...

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Bibliographic Details
Published in:Radiophysics and quantum electronics 2023-02, Vol.65 (9), p.689-697
Main Authors: E.Chumankin, Yu, Fidelman, V. R., Morozov, O. A.
Format: Article
Language:English
Subjects:
Analysis
Antennas (Electronics)
Astronomy
Astrophysics and Astroparticles
Deformation
Direction finding
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Methods
Multibeam antennas
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Parabolic antennas
Photonics
Physics
Physics and Astronomy
Quantum Optics
Signal to noise ratio
Theoretical
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Description
Summary:We propose a method for calculating the displacements of the main maxima of the directional-pattern beams of a reflectory multibeam antenna, which are related to the reflector deformation, and estimate its accuracy. To describe the deformation, we use the model of the displaced and rotated reflector of a perfect calculated form, which agrees with the form of the deformed reflector in the sense of the minimum of the root-mean-square error. The numerical experiment for an offset parabolic antenna with a diameter of 10 m, a focal distance of 7 m, and an adjustment frequency of 800 MHz of the receiving elements is performed. The numerical-experiment results show that the proposed method allows one to perform direction finding using the signals with a smaller signal-to-noise ratio.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-023-10249-9