Near-Field Orthogonal Beam Scan by Phased Arrays of Antennas with Active Analog Beamformer for Maximum NF-RCS in Target Detection
Journal
IEEE Transactions on Antennas and Propagation
Journal Volume
70
Journal Issue
2
Pages
1559-1564
Date Issued
2022
Author(s)
Abstract
Near-field radar cross section (NF-RCS) of a target depends on antennas' radiation and can be maximized by adjusting the radiation patterns. It is justified by the power return ratio and can be computed by a comparison method. A theoretical foundation of operational mechanism for phased arrays of antennas is presented to produce conformal radiations for NF-RCS enhancement. The target's scattering coefficients are extracted from operating the antenna array's digital phase shifters (DPSs) to steer the resulting beams in this work. The scattering matrix is then analyzed by the singular value decomposition (SVD) to determine the antennas' excitations for maximum NF-RCS with estimation stability. It results in orthogonal beams for the two-way radiations of antenna arrays to interpret the scattering mechanisms. The feasibility is validated by HFSS full-wave simulations and experimental measurement data. ? 1963-2012 IEEE.
Subjects
Antenna arrays
Near-field (NF) detection
Radar cross section (RCS)
Singular value decomposition (SVD)
Target detection
Antenna phased arrays
Directional patterns (antenna)
Radar antennas
Radar cross section
Tracking radar
Beam scan
Field detections
Near fields
Near-field detection
Orthogonal beams
Phased-arrays
Radar cross-sections
Singular value decomposition
Targets detection
SDGs
Type
journal article