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A Hybrid Framework for Antenna/Platform Analysis

机译:天线/平台分析的混合框架

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Hybrid combinations of numerical and asymptotic methods are utilized to evaluate in-situ antenna performance, and coupling to other systems on a shared platform such as a ship topside. This paper describes a combination of the finite element-boundary (FE-BI) method with ray techniques for evaluating antenna patterns in the presence of complex platforms. Specifically, a very complex array antenna may be modeled with FE-BI, and interfaced to the platform via the use of equivalent currents. For the case considered here, the FE-BI is accelerated with the array decomposition fast multipole method (AD-FMM) so that large arrays may be considered. A novel discrete Fourier transform method is also introduced to provide a greatly reduced representation of the fields over a planar array aperture and the uniform theory of diffraction (UTD) along with iterative physical optics (IPO) are used to characterize the platform. To tie it all together, a matrix framework is formulated to iteratively increment the higher order interactions between antennas and platform.
机译:数值和渐进方法的混合组合用于评估原位天线性能,并耦合到共享平台(如船顶)上的其他系统。本文介绍了有限元边界(FE-BI)方法与射线技术的结合,用于在复杂平台下评估天线方向图。具体而言,可以使用FE-BI对非常复杂的阵列天线进行建模,并通过使用等效电流将其连接到平台。对于此处考虑的情况,通过阵列分解快速多极方法(AD-FMM)加速了FE-BI,因此可以考虑使用大型阵列。还引入了一种新颖的离散傅里叶变换方法,以大大减少平面阵列孔径上的场表示,并且使用统一的衍射理论(UTD)和迭代物理光学(IPO)来表征平台。为了将它们联系在一起,制定了矩阵框架以迭代地增加天线与平台之间的更高阶交互。

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