Simulation Method of Broadband Electromagnetic Scattering Characteristics of Conductive Targets

Abstract

The invention discloses a method for simulating the wide-band electromagnetic scattering property of a conductor target. The method comprises the following steps that the geometric model of the conductor target is built, and mesh generation is conducted on the surface of the conductor target by a curved surface triangle unit; a time domain electric field integral equation of the conductor target is determined; a surface induction current in the time domain electric field integral equation expands through a space CRWG primary function and a time delay primary function; an expanding surface induction current expression is substituted into the time domain electric field integral equation, and then the time domain electric field integral equation in a discrete form is tested in a time and space mode so as to obtain a system impedance matrix equation; singularity integrals are eliminated to obtain a sparse expression of a impedance matrix; the equation of the impedance matrix is solved to determine the distribution of the time domain current of the surface of the conductor target, and wide-band electromagnetic property parameters of the target are obtained according to the distribution of the time domain current so as to finish simulation. The method for simulating the wide-band electromagnetic scattering property of the conductor target has the advantages of being high in simulation precision, little in required time and low in memory consumption, and has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of electromagnetic simulation, in particular to a simulation method for broadband electromagnetic scattering characteristics of a conductor target. Background technique [0002] In recent years, with the rapid development of science and technology, the demand for simulating ultra-wideband signals and nonlinear systems is increasing. Therefore, there is an urgent requirement for fast, accurate and stable simulation and analysis of transient electromagnetic problems in arbitrary complex conductor dielectric structures. In actual engineering, to obtain a broadband response, the frequency domain method can be used to calculate enough frequency points, and then the target broadband response data can be obtained through Fourier inverse transform. [0003] In the frequency domain integral equation method analysis, the induced current on the target surface is a complex vector, that is, the induced current contains b...

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Problems solved by technology

[0004] The above-mentioned documents 1 to 3 report the analysis method using the phase basis function in the frequency domain. However, due to the resonance phenomenon and the existence of high and low frequency components, the calculation methods at different frequency points are also different, resulting in a large amount of calculation and high complexity, and The inability to intuitively understand field interactions from simulation results makes frequency-domain methods lose their advantages

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