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

Zhanling Wang,Yongzhen Li,Chen Pang,Xuesong Wang

doi:10.1109/access.2019.2947743

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 ( $Z_{DR}^{b}$ ), the bias of linear depolarization ratio ( $L_{DR}^{b}$ ) and the phase difference are less than 0.14 dB, 46.85 dB, 3.31° in a wide scanning angle range, respectively.

Highlights

Phased array antenna (PAA) with agile electronic beam steering capability has been successfully utilized in the communication, military application and weather observation [1]–[6], with respect to the mechanically scanning dish antenna
Since the accurate multiparameter measurement ability of the polarimetry has matured for years, the polarimetric PAA (PPAA) with the dual-polarization capability will be indispensable in future targets or weather observation [7]
POLARIZATION BIAS CORRECTION VIA PROPOSED METHOD In this paper, the bias of the measured polarimetric information with the PPAA is corrected based on the pattern reconstruction method

Summary

Introduction

Phased array antenna (PAA) with agile electronic beam steering capability has been successfully utilized in the communication, military application and weather observation [1]–[6], with respect to the mechanically scanning dish antenna. INDEX TERMS Bias correction, pattern reconstruction, polarimetric phased array antenna, polarization measurement. The above-mentioned correction method for the polarization measurement bias is implemented based on an ideal antenna element, and the correction matrix is made up of the theoretical pattern.

Results

Conclusion