Attitude-measurable and adjustable polarized radar passive calibrator and radar calibration method

Abstract

The invention relates to an attitude-measurable and adjustable polarized radar passive calibrator and a radar calibration method. The polarized radar passive calibrator comprises an air maneuvering platform, control equipment of the air maneuvering platform, a dihedral angle and MEMS inertial navigation equipment, wherein the dihedral angle and the MEMS inertial navigation equipment are installed on the air maneuvering platform. The position and attitude of a dihedral angle on an air maneuvering platform are adjusted through control equipment, relative attitude measurement data of the dihedral angle relative to a polarized radar are obtained through MEMS inertial navigation, and the polarized radar is calibrated by the control equipment based on a polarized radar passive calibration technology according to the relative attitude measurement data. The polarization scattering matrix of the radar calibrator can be accurately obtained, ground clutter interference can be avoided by adjusting the position of the calibrator, and the radar calibrator can be flexibly applied to polarization radar calibration in different environments.

Description

technical field [0001] The present application relates to the technical field of radar measurement, in particular to a polarimetric radar passive calibrator and radar calibration method with measurable and adjustable attitude. Background technique [0002] Radar uses radio waves to detect and locate targets. It is not only used for military detection, but also increasingly widely used in national economic construction and various scientific researches. With the development of technology, the requirement for radar is not only the traditional measurement, but also accurate and clear measurement. Precision measurement has increasingly become the standard and premise of radar application. Polarization radar is currently a research hotspot in the world. Polarization is another important physical parameter of electromagnetic wave besides amplitude, phase and frequency, which characterizes the transmission characteristics of electromagnetic wave vector. Polarization information c...

AI Technical Summary

Problems solved by technology

However, in this method, due to the small RCS of the metal ball, in order to realize that the echoes of the metal ball and the drone do not alias, a 50m long line is used to connect the metal ball and the drone, and the radar works in the high-range resolution mode. Therefore, this method is not suitable for calibration scenarios with large far-field conditions.

In addition, the metal ball used is only suitable for the main polarization calibration of the polarimetric radar, not for the cross-polarization component calibration of the polarimetric radar

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