Rotatable symmetrical radome and parabolic antenna integrated electromagnetic scattering simulation method

Abstract

The invention discloses a rotatable symmetrical radome and parabolic antenna integrated electromagnetic scattering simulation method, which comprises the following steps of 1) establishing a local rectangular coordinate system of a rotatable symmetrical radome, a local rectangular coordinate system of a parabolic antenna and a virtual equivalent sphere, and then subdividing and discretizing each generatrix; 2) adding an excitation source and determining excitation vectors; 3) respectively establishing impedance matrixes and inverse matrixes thereof in the two rectangular coordinate systems; 4) determining scattering matrixes and transmission matrixes; 5) establishing a relationship between the two rectangular coordinate systems by rotating the coordinate systems, and converting equivalent electromagnetic current on the virtual equivalent sphere between the two local rectangular coordinate systems; 6) establishing a solving equation set according to information obtained in the step 2 to the step 5, and resolving to obtain equivalent scattered electromagnetic current on the rotatable symmetrical radome and the virtual equivalent sphere; and 7) determining radar scattering section area according to a reciprocal theory. The rotatable symmetrical radome and parabolic antenna integrated electromagnetic scattering simulation method provided by the invention has the advantages of fast speed, low internal memory consumption and high solving precision.

Description

Technical field [0001] The invention relates to electromagnetic simulation technology, in particular to an integrated electromagnetic scattering simulation method of a rotationally symmetric radome and a parabolic antenna. Background technique [0002] Using the method of moments to analyze and study the electromagnetic scattering of various rotationally symmetric bodies has always been a hot topic in the research of electromagnetic scattering simulation. However, as the size of the radome increases, the traditional electromagnetic scattering simulation method based on RWG basis function subdivision modeling requires a large amount of computer memory and a long calculation time, and personal computers are no longer competent. Generally, the radome is mostly a rotationally symmetric structure of dielectric materials, and the rotationally symmetric body moment method is used for electromagnetic scattering simulation. [0003] Andreasen, M.G first proposed the rotationally symmetric ...

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Problems solved by technology

Although both the radome and the parabolic antenna have a rotationally symmetric structure, the dielectric part can be analyzed using the PMCHW equation, and the metal part can be analyzed separately using the electric field integral equation (Zhang Jianfeng, "Analysis of rotationally symmetric dielectric shells," 2004), but both The integrated analysis does not have the characteristic of rotational symmetry, and the rotationally symmetric body moment method cannot obtain mutually orthogonal independent modes, and the method fails

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