介質(zhì)涂敷電大腔體電磁散射IPO研究
IPO for Analysis of EM Scattering by Dielectric Coated Electrically Large Cavities
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摘要: 將迭代物理光學(xué)法(IPO)推廣應(yīng)用于研究具有非完純導(dǎo)電邊界的電磁散射問(wèn)題,建立了相應(yīng)的理論模型,并應(yīng)用到內(nèi)壁涂敷介質(zhì)的電大尺寸腔體的電磁散射特性分析中。在每一次IPO迭代步驟中,應(yīng)用Fresnel反射系數(shù)計(jì)算出介質(zhì)表面總場(chǎng)。通過(guò)多次迭代,求出腔體內(nèi)壁上穩(wěn)定的電磁場(chǎng)分布,進(jìn)而計(jì)算出腔體的電磁散射特性。數(shù)值結(jié)果表明了這種擴(kuò)展的IPO方法的在分析電大尺寸介質(zhì)涂敷目標(biāo)中的正確性和高效性。
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關(guān)鍵詞:
- 迭代物理光學(xué); Fresnel反射系數(shù); 介質(zhì)涂敷腔體
Abstract: A theoretical model of Iterative Physical Optics (IPO) is established for the ElectroMagnetic (EM) scattering problem with imperfectly conducting boundaiy and applied to the analysis of EM scattering by a dielectric coated electrically large cavity. In each IPO iteration step, the total field on the dielectric surface is computed utilizing the Fresnel reflection coefficient. By employing iteration process, the EM field distribution on the inner wall of the cavity is predicted and then the scattering fields of the cavity are obtained. Numerical results demonstrate that the improved IPO algorithm is correct and effective for the analysis of dielectric coated electrically large targets. -
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