A Method of Reducing the Error of Hybrid Algorithm of Geometrical Optics and Physical Optics

Abstract

The invention discloses a method for reducing the error of a geometrical optics and physical optics mixed algorithm. The method for reducing the error of the geometrical optics and physical optics mixed algorithm is characterized in that a method for dividing incident wave energy is adopted to divide the cross section of an incident wave beam into a plurality of rectangles, and each rectangular wave beam and a pixel matrix have a one-to-one corresponding relationship; after the scattered field of each rectangular wave beam is calculated, superposition is carried out to obtain a final target scattered field; and after the incident wave is divided into a plurality of rectangular wave beams according to the pixel matrix, formula derivation is carried out, and the scattered field of each rectangular wave beam is calculated through the parameter of the rectangular wave beam. By use of the method, after the incident wave is divided into a plurality of rectangular wave beams according to the pixel matrix, after the formula derivation is carried out, the scattered field of each rectangular wave beam can be calculated through the parameter of the rectangular wave beam and is irrelevant to the shape and the size of a surface element. The accuracy of a calculation result is decided by the calculation accuracy of each rectangular wave and is irrelevant to the frequency of electromagnetic wave.

Description

technical field [0001] The invention belongs to the technical field of high-frequency calculation, and in particular relates to a method for reducing the error of a hybrid algorithm of geometric optics and physical optics. Background technique [0002] At present, in the high-frequency algorithm, the method of calculating the multiple scattering field of the target by means of ray tracing includes the hybrid algorithm of geometric optics and physical optics and the bouncing ray method. For the general geometric optics and physical optics hybrid algorithm, the accuracy of the multiple scattering field depends on the size of the bin size. If the bin size is too large, it will cause a large error in the judgment of bin occlusion. When the size of the bins is small, the number of bins is also relatively large. When the graphic occlusion method is used, more pixels are required than the number of bins, which will increase the amount of calculation and reduce the calculation effic...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for reducing the error of the hybrid algorithm of geometric optics and physical optics, aiming at solving the problems of large errors, low calculation efficiency and low calculation efficiency in the existing multiple scattering field method of calculating the target by means of ray tracing. high volume problem

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