基于广义超公式的透镜天线设计工具

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of radio frequency identification Pub Date : 2024-03-02 DOI:10.1109/JRFID.2024.3396333
Alberto Facchini;Francesco Paolo Chietera;Riccardo Colella;Luca Catarinucci;Pietro Bia;Luciano Mescia
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引用次数: 0

摘要

在这项工作中,通过使用实验室制造的电磁工具,介绍了一类新型三维介质透镜天线的设计。透镜天线使用广义超公式建模,允许额外的自由度,可利用这些自由度获得具有平坦表面区域、陡峭侧面、非旋转对称或调制和非球面表面轮廓的复杂透镜形状。得益于该公式的自由参数,透镜的几何形状可以通过简单的分析方法进行调整。电磁学工具基于几何光学和管跟踪近似以及物理光学方法。通过这种方法,可以计算透镜区域内的多重波反射以及透镜外的远场。此外,还开发了一种基于蜂群智能的高效合成程序,并将其集成到数值代码中。借助这一设计工具,可以确定透镜参数,从而以较低的计算负担获得最佳的天线特性和理想的辐射模式。
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Lens Antenna Design Tool Based on Generalized Superformula
In this work, the design of a novel class of 3D dielectric lens antennas through the use of a lab-made electromagnetic tool is presented. The lens antenna is modeled using a generalized superformula allowing additional degree of freedom which can be exploited to obtain complex lens shapes with flat surface regions, steep sides, a non-rotational symmetry, or a modulated and aspherical surface profile. Thanks to the free parameters characterizing this formula, the lens geometry can be adjusted in a simple and analytical way. The electromagnetic tool is based on the geometrical optics and tube tracing approximations as well as the physical optics approach. In this way, the multiple wave reflections within the lens region as well as the far field outside the lens can be calculated. Moreover, an efficient synthesis procedure based on swarm intelligence has been developed and integrated in the numerical code. Thanks to this design tool it is possible to identify the lens parameters yielding the optimal antenna characteristic and a desired radiation patterns with low computational burden.
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