Polarimetric Bias Correction of Practical Planar Scanned Antennas for Meteorological Applications

et al. 2020

Electronics

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The cross-polarization isolation (CPI) is a key parameter to assess the dual-polarization antenna because the cross-polarization closely affects the antenna application. A polarization state configuration (PSC) approach is proposed to configure the polarization state of the polarimetric phased array radar antenna. Unlike the traditional fixed polarization states such as the linear polarization (LP) and the circular polarization (CP), the PSC method modulates the polarization state of the radiated wave continuously. In addition, the optimal excitation magnitude and phase of the dual-polarization element is calculated, thereby maximizing the CPI. Most of the configured polarization state is the elliptical polarization (EP), and a lower cross-polarization level and higher CPI could be obtained. This method could expand the acceptable angle range when compared with the LP and CP waves. Numerical simulations and comparisons are conducted to manifest the validity of the proposed method.

“…On the basis of formula (5) and formula (6), when the activated ports radiate the RHEP wave, the co-polarization and cross-polarization components are…”

Section: Radiation Model Of Crossed Dipolesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

Electronics

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“…Recently, polarimetric phased array radar (PPAR) has attracted broad interest, owing to its potential in weather observation, air traffic control, and air surveillance [1][2][3][4][5][6][7]. However, some challenges, especially the requirement of high accuracy for polarimetric measurement, still hinder the development of the PPAR technology [7][8][9]. To be specific, the electric fields radiated from the horizontal (H) and vertical (V) ports are not orthogonal to each other caused by beam steering off the principal plane [3].…”

Section: Introductionmentioning

confidence: 99%

“…To address the problem, some calibration/correction methods have been studied. The bias correction technique for polarization measurement in PPAR was firstly put forward in [3], simulated in [9][10][11][12], and further updated in [13], and demonstrated in [5,14] using the large-scale testbeds. Thus far, most bias corrections focus on the narrow-band pulse.…”

Section: Introductionmentioning

confidence: 99%

Bias Correction to Antenna Frequency Response for Wideband Polarimetric Phased Array Radar

et al. 2019

Electronics

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The frequency response of wideband polarimetric phased array radar antenna biases polarization measurement. A bias correction method named the iterative frequency division (IFD) algorithm is proposed in this paper to eliminate the effect of frequency response of the antenna system. The method is built on a new measurement bias model in which the effects of frequency response on the backscattering covariance matrix are analyzed. To demonstrate the effectiveness of the proposed method, a wideband microstrip patch array element is designed. Simulation results show that the biases of differential reflectivity ( Z D R ) and linear depolarization ratio ( L D R ) can be decreased to less than 0.1 dB and − 40 dB even for wide beam direction. The proposed method maintains a favorable polarization measurement accuracy for wideband polarimetric phased array radar.

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

et al. 2019

IEEE Access

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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.