Method and system for extracting radar scattering feature data based on plasma near-field testing

Abstract

A method and system for extracting radar scattering feature data based on plasma near-field testing are disclosed. An ISAR imaging principle is adopted in a microwave anechoic chamber simulating vacuum environment, and a one-dimensional scanning near-field test method is employed to test scattering performance of a tested target. A near-field scattering 2D image of the tested target is obtained, and near-field correction techniques are used to correct errors of influence error exerted by spherical waves on RCS performance tests. A scattering center is adopted to achieve far-field RCS extrapolation of the tested target, and radar scattering cross section far field data of the test target is obtained. Via the test and the data extraction method, overall target radar cross section data of a plasma-coated aircraft can be provided for a special environment that generates plasma clouds and for peculiar diffusion and ionization characteristics of plasma. A test angle covers a wide angle rangeof -30 degrees to 30 degrees, test accuracy is higher than 2dB, and therefore a test method is provided for plasma stealth technology research and stealth performance evaluation.

Description

technical field [0001] The invention relates to a method and system for extracting radar scattering characteristic data based on plasma near-field testing, and belongs to the technical field of plasma stealth performance testing. Background technique [0002] Plasma has the characteristics of ionization, diffusibility, and easy flow. When electromagnetic waves propagate in plasma, electromagnetic waves will interact with ions and electrons in plasma, showing reflection, refraction, absorption and other effects. By wrapping the plasma around the object, the radar scattering characteristics of the object to electromagnetic waves can be changed. Therefore, the plasma can be used for the radar stealth of the object. [0003] How to obtain radar scattering characteristic data of plasma-coated objects is an urgent problem to be solved in the field of stealth testing technology. Due to the diffusion characteristics and easy flow of plasma, after the plasma source generates plasma,...

AI Technical Summary

Problems solved by technology

However, in plasma measurement, the distance between the measured object and the measuring antenna is always limited, and the electromagnetic waves incident on the test area are almost spherical waves, and the plasma will spread to the position of the antenna mouth. The existing RCS test method Difficult to obtain performance data on plasma stealth targets

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