In this paper we provide a modified 3D Uniform Theory of Diffraction (UTD) model for afinite-length cylinder, and validate the model by comparing to the simulation and the measured data. The presented finite-cylinder UTD model is adapted from the conventional infinite-cylinder model, and we additionally add edge diffraction occurring at the edge of the cap of the finite cylinder. The simulation reference is obtained from the CST simulation and the measurement reference is obtained from a vector network analyzer based channel sounder. From the numerical examples and analysis, it is shown that the modified model agrees well with the references and is more accurate than the conventional unmodified model. This study proves the importance of the edge diffraction field for finite-cylinder UTD solutions specially when 1) the transmitter and receiver are at different heights relative to the cylinder, and 2) one is below and the other is above the height of the cylinder.

中文翻译：

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有限长度圆柱形 3D UTD 模型的仿真和测量验证


在本文中，我们提供了有限长度圆柱体的改进 3D 均匀衍射理论 (UTD) 模型，并通过与仿真和测量数据进行比较来验证该模型。所提出的有限圆柱体 UTD 模型改编自传统的无限圆柱体模型，并且我们还添加了发生在有限圆柱体盖边缘的边缘衍射。仿真参考是从 CST 仿真获得的，测量参考是从基于矢量网络分析仪的信道探测仪获得的。数值算例和分析表明，修正后的模型与参考文献吻合较好，并且比传统的未修正模型更加准确。这项研究证明了边缘衍射场对于有限圆柱 UTD 解决方案的重要性，特别是当 1) 发射器和接收器相对于圆柱体处于不同高度，以及 2) 一个位于圆柱体高度下方，另一个位于圆柱体高度上方时。