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Imaging-based analysis method for absorbing material coated target creeping wave

A technology of wave absorbing material and analysis method, which is applied in the reflection/re-radiation of radio waves, image data processing, radio wave measurement system, etc. Versatility, accurate calculation method

Active Publication Date: 2017-04-26
SHANGHAI RADIO EQUIP RES INST
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide an imaging-based analysis method for target creeping waves coated with absorbing materials, which can solve the problem that the prior art cannot simultaneously consider the complex geometry and the influence of absorbing materials coating on creeping waves , can provide a universally applicable and simple imaging analysis method for creeping wave analysis, and can provide a method of suppressing creeping wave

Method used

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  • Imaging-based analysis method for absorbing material coated target creeping wave
  • Imaging-based analysis method for absorbing material coated target creeping wave
  • Imaging-based analysis method for absorbing material coated target creeping wave

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Embodiment

[0041] The present invention is used to provide a method for analyzing target creeping waves coated with imaging-based wave-absorbing materials. The method is specifically as follows:

[0042] Step 1: If figure 1 As shown, construct a conical three-dimensional geometric model with a wall thickness of 2~4mm (preferably 3mm), the bottom diameter of the cone is 0.35m~0.55m (preferably 0.45m), and the height is 1.525m~1.725m (preferably 1.625m), The angle between the axis and the Y axis is 13°, and the type, parameters and thickness of the material of the model are set.

[0043] Step 2: The calculation method of imaging range resolution is as formula (1), and the calculation method of azimuth resolution is as formula (2),

[0044]

[0045]

[0046] In the formula, c is the speed of light, B is the bandwidth, λ is the wavelength, Δθ is the opening angle, δ r Indicates the range resolution, δ cIndicates the azimuth resolution. Through the above formulas (1) and (2), the ca...

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Abstract

The invention discloses an imaging-based analysis method for absorbing material coated target creeping wave. The method comprises the following steps of step 1.constructing a three-dimensional geometrical model and setting material properties of the model; step 2.setting a scanning frequency range and a frequency interval of radar according to range resolution, determining a scanning position range and an interval according to azimuth resolution and carrying out imaging and computing a scattered field of a far zone or a near zone in needed bandwidth and angle range; step 3.adopting an FBP algorithm to carry out data processing on the scattered field in the step 2 to realize high-resolution imaging in order to obtain a two-dimensional ISAR image; and step 4.analyzing a specific location of the creeping wave according to the two-dimensional ISAR image and further extracting a creeping wave component, wherein the properties of a selected material are optimal when the creeping wave component is smallest. The method of the invention is universally applicable to creeping wave analysis, the imaging analysis is simple and a method for restraining the creeping wave is provided.

Description

technical field [0001] The invention relates to radar target characteristic simulation technology, in particular to a method for analyzing creeping waves of targets coated with wave-absorbing materials based on imaging. Background technique [0002] The diffraction contribution of creeping waves on curved surfaces is crucial in the electromagnetic scattering properties. Creeping wave tracing is a common method for calculating and analyzing creeping waves. The traditional Uniform Theory of Geometric Diffraction (UTD) uses typical geometry to approximate the shape of complex models. The creeping wave tracing is relatively simple and can be obtained directly through analytical calculations. out. However, it is difficult for typical geometric objects to approximate geometric objects in engineering applications, which greatly limits the application range of this method. However, tracking of creeping waves on curved surfaces with arbitrary shapes is very complicated, and the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00G01S13/9064G06F30/20
Inventor 高伟贺新毅谢志杰王波
Owner SHANGHAI RADIO EQUIP RES INST
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