本文選題：面元模型 + 圖形電磁學(xué)�。� 參考：《國防科技大學(xué)學(xué)報(bào)》2016年04期

【摘要】：在微波高頻段,海面背景或海上船類目標(biāo)往往具有電大尺寸和復(fù)雜精細(xì)的結(jié)構(gòu),這給船海復(fù)合場景的電磁建模帶來巨大的計(jì)算負(fù)擔(dān)。為簡化計(jì)算,基于海面電磁散射模型面元化思想和圖形電磁學(xué),結(jié)合計(jì)算耦合場的四路徑模型,提出一種電大尺寸船海復(fù)合場景電磁散射的快速計(jì)算方法。在保證海面與目標(biāo)復(fù)合散射場的計(jì)算準(zhǔn)確性前提下,提高計(jì)算效率。仿真并分析不同雷達(dá)參數(shù)下動(dòng)態(tài)海面與目標(biāo)的雷達(dá)散射截面,計(jì)算結(jié)果與實(shí)測數(shù)據(jù)以及精確數(shù)值方法結(jié)果的良好一致性驗(yàn)證了方法的準(zhǔn)確性。將復(fù)合散射快速計(jì)算方法應(yīng)用于合成孔徑雷達(dá)成像仿真,仿真結(jié)果驗(yàn)證了方法的有效性。
[Abstract]:In the high frequency band of microwave, the sea surface background or the marine ship type target often has the electrically large size and the complex fine structure, which brings the huge computational burden to the electromagnetic modeling of the ship-sea composite scene. In order to simplify the calculation, a fast calculation method for electromagnetic scattering from electrically large scale ship-sea composite scenes is proposed based on the surface element method of sea surface electromagnetic scattering model and graphic electromagnetics, combined with the four-path model of coupled field calculation. The computational efficiency is improved on the premise of ensuring the accuracy of the complex scattering field between the sea surface and the target. The radar cross sections of dynamic sea surface and target under different radar parameters are simulated and analyzed. The accuracy of the method is verified by the good consistency of the calculated results with the measured data and the accurate numerical results. The fast calculation method of complex scattering is applied to synthetic Aperture Radar (SAR) imaging simulation, and the simulation results verify the effectiveness of the method.
【作者單位】： 西安電子科技大學(xué)物理與光電工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61372004,41306188)
【分類號(hào)】：U675.74;TN957.52
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本文編號(hào)：2116865