Bias Correction for Polarization Measurement in Phased Array Antenna Via Pattern Reconstruction Method

Abstract

A reconstruction technique of the antenna pattern for correcting the polarization measurement bias is proposed in this paper. In the case of the prior knowledge of patterns at some scanning angles, the pattern at other beam position can be estimated by application of the minimum norm least-square solution. Once the pattern is reconstructed, the corresponding projection matrix could be obtained in the presence of the mutual coupling and edge effects in the polarimetric phased array antenna. Thereby, the correction matrix for the polarization scattering matrix is repaired. A microstrip patch array antenna is designed to demonstrate the validity of the proposed method, and the performance of bias correction is manifested using several polarimetric variables. Specifically, the bias of differential reflectivity (Z b DR), the bias of linear depolarization ratio (L b DR) and the phase difference are less than 0.14 dB, 46.85 dB, 3.31 • in a wide scanning angle range, respectively.

A Low Cross-Polarization Configuration Method for Phased Array Radar Antenna

“…Moreover, the correction matrix based on the theoretical pattern is not necessarily feasible due to the distortion of the radiation pattern, which results from mutual coupling and the edge diffraction between antenna elements. To reduce the effect of non-ideality, a reconstruction technique for the antenna pattern is proposed to correct the polarization measurement bias [12,13]. However, the source of bias still exists, and the bias increases with the larger of the beam scanning angle deviation.…”

An Adaptive Direction-Dependent Polarization State Configuration Method for High Isolation in Polarimetric Phased Array Radar

“…In addition, because of the inevitable distortion of radiation pattern mainly resulting from the mutual coupling [16], the correction matrix using the theoretical pattern is not completely effective. To mitigate the effect of non-ideality on the polarization measurement, a pattern reconstruction method is put forward in [17], [18].…”