Projection method-based high-frequency electromagnetic shielding judgement method

A high-frequency electromagnetic and projection technology, which is used in electrical digital data processing, special data processing applications, instruments, etc., to reduce memory consumption, reduce computational complexity, and improve computational efficiency.

Active Publication Date: 2018-08-24
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

This method can not only quickly solve the problem of occlusion judgment, but also be used for radar scattering calculation of high-frequency electric large-size targets such as terahertz electromagnetic scattering simulation

Method used

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  • Projection method-based high-frequency electromagnetic shielding judgement method
  • Projection method-based high-frequency electromagnetic shielding judgement method
  • Projection method-based high-frequency electromagnetic shielding judgement method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] refer to figure 1 , the implementation steps of the present invention are as follows:

[0025] Step 1. Segment the target surface.

[0026] Use CAD or FEKO software to build a geometric model and subdivide the target surface. That is, the size of the subdivision panel is different according to the algorithm used. In this example, select the side whose side length is smaller than the curvature of the target surface. and less than the target wavelength Divide the target object into N triangular surface elements, and the number of N depends on the size of the target. In this example, the boat model is used, and N is 52176.

[0027] Step 2. Establish a projection plane and a projection coordinate system.

[0028] This step refers to figure 2 proceed, where k i is the incident unit vector of electromagnetic waves, r n is the vector from the ...

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Abstract

The invention discloses a projection method-based high-frequency electromagnetic shielding judgement method, and mainly aims at solving the problem that shielding judgement in existing high-frequencyelectromagnetic calculation is inaccurate and low in efficiency. The method comprises the following steps of: 1, dividing a target surface into a plurality of triangles; 2, taking a plane which passesthrough a coordinate origin and takes an incident wave vector as a normal vector as a projection plane, and dividing the plane into a plurality of areas; 3, solving projection points of central points of triangle surface elements of the target surface; 4, solving projection heights of the central points of the triangle surface elements, and finding out a triangle surface element with the highestprojection height in each area, wherein the found triangle surface element is a non-shielded surface, and the other triangle surface elements in the same area are shielded surfaces; and 5, calculatinga radar cross section of each non-shielded surface, and overlapping the radar cross sections of all the non-shielded surfaces of the target surface so as to obtain a total radar cross section of thetarget surface. According to the method, the time required for shielding judgement is shortened and the shielding judgement precision is improved, so that the method can be used for terahertz electromagnetic scattering simulation.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic scattering, in particular to a method for calculating high-frequency electromagnetic shielding judgment, which can be used for terahertz electromagnetic scattering simulation. Background technique [0002] The physical optics algorithm is an electromagnetic simulation method to calculate the electromagnetic scattering in the high frequency region of the target. It first needs to model the research target, that is, the target surface is mainly divided into several surface elements, and some surface elements will not be irradiated by electromagnetic waves according to the different irradiation directions of incident electromagnetic waves. According to physical and optical assumptions, the irradiated part will generate induced current and electromagnetic scattering, while the part that is not irradiated will not generate induced current and will not generate electromagnetic scattering. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 吕志清雷浩
Owner XIDIAN UNIV
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