Method and device for calculating electric field in the scattering problem of conductor rough surface

Abstract

The invention provides an electric field calculation method and device in a conductor a rough surface scattering problem. The method comprises the following steps that: selecting M discrete coordinatepoints at equal intervals on a conductor rough surface of which the length is L, M is equal to 2N, and N is a positive integer; according to the horizontal axes and the longitudinal axes of the M discrete coordinate points, independently calculating a 0-order scattered field to an n-order scattered field, wherein n is the target order of an electric field to be calculated; calculating a one-orderpartial derivative in the z-axis direction of the obtained each-order scattered field to the n-order partial derivative in the z-axis direction; and according to an incident field, the one-order partial derivative in the z-axis direction of the obtained each-order scattered field to the n-order partial derivative in the z-axis direction and an n-order electric field expression, calculating the n-order electric field of the conductor rough surface. Therefore, the electric field of any order can be calculated, calculation accuracy is high, time complexity is lowered, and calculation efficiencyis improved.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a method and device for calculating an electric field in the scattering problem of a conductor rough surface. Background technique [0002] Electromagnetic scattering from rough surfaces has a wide range of applications, such as remote sensing, marine geography, communication, material science, medical imaging, etc. Generally, the electric field of a rough surface is the sum of the incident field and the scattered field, and the incident field is a known function, and its calculation formula is as follows [0003] [0004] in, [0005] [0006] Among them, k is the wave number of electromagnetic waves in vacuum, g is the cone factor, θ i is the incident angle of the electromagnetic wave. [0007] The calculation methods of the scattered field of rough surface are mainly divided into two categories: analytical method and numerical method. The analytic...

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Problems solved by technology

[0014] From the above calculation process, it can be seen that the dimension of the integral solved by the classical perturbation method increases with the increase of the order of the scattering field. Although the solution of a higher order scattering field can sometimes be obtained in theory, the actual calculation is often limited by The calculation difficulty and calculation error of multiple integrals, so the order of the scattered field solved by the classical perturbation method mostly stays on the second or third order solution, and a small part extends to the fourth order solution, and the higher order scattering field above the fourth order cannot be calculated. out

Therefore, the electric field of the high-order rough surface cannot be obtained

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