A method and system for extracting radar scattering characteristic data based on plasma near-field test

A characteristic data and radar scattering technology, applied in radio wave measurement system, radio wave reflection/re-radiation, measurement device, etc., can solve the problem of difficulty in obtaining performance data of plasma stealth targets, limited distance between the measured object and the measurement antenna, etc. question
CN107942330BActive Publication Date: 2019-08-09BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE
Publication Date
2019-08-09

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Abstract

A method and system for extracting radar scattering characteristic data based on plasma near-field testing. By adopting the ISAR imaging principle in a microwave anechoic chamber simulating a vacuum environment and using a one-dimensional scanning near-field testing method, the scattering performance test of the measured target is carried out. Obtain the near-field scattering two-dimensional image of the target under test, and use the near-field correction technology to correct the influence error of the spherical wave on the RCS performance test, and then use the scattering center to realize the far-field RCS extrapolation of the target under test, and obtain the radar of the target under test Scattering cross-section far-field data. This method of testing and data extraction can give the overall target radar cross-section data of the plasma-enveloped aircraft according to the special environment in which the plasma cloud is generated, as well as the unique diffusion and ionization characteristics of the plasma, and the test angles cover- With a wide angle range of 30° to 30°, the test accuracy is better than 2dB, thus providing an experimental method for plasma stealth technology research and stealth performance evaluation.
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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,...

Claims

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