Design of Artificial-Material-Based Antennas Using Inverse Scattering Techniques
Design of Artificial-Material-Based Antennas Using Inverse Scattering Techniques
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DOI：
10.1109/tap.2018.2871707
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发表时间：
2018-12-01
影响因子：
5.7
通讯作者：
Isernia, Tommaso
中科院分区：
文献类型：
--
作者：
Palmeri, Roberta;Bevacqua, Martina Teresa;Isernia, Tommaso
提出了一种基于梯度人工材料（GAM）的器件设计的新方法，利用逆散射框架作为综合工具。所介绍的一般方法可以适用于任意远场规格，从而允许设计的noncanonical设备。特别地，基于渐变折射率（GAM（R））或渐变填充因子（GAM（F））为GAM开发了两种不同的策略。在这两种策略中，逆散射问题通过适当的对比源反演方法的重新表述来解决，其中还使用了初级源的幅度的适当重新缩放。特别地，在第一种策略中，GAM（F）是通过利用均匀化理论获得的。在第二种策略中，GAM（R）通过利用未知对比函数的合适表示基来合成，然后使用简单的解析公式来确定相应的GAM（F）。所提出的方法进行评估，通过合成的天线产生的西格玛/德尔塔可重构模式。
A new approach to the design of graded artificial materials (GAMs)-based devices is proposed by exploiting the inverse scattering framework as a synthesis tool. The introduced general methodology can be applied to arbitrary far-field specifications, thus allowing the design of noncanonical devices. In particular, two different strategies are developed for GAMs based on either graded refractive index (GAM(R)) or graded filling factor (GAM(F)). In both strategies, the inverse scattering problem is solved by a proper reformulation of the contrast source inversion method, wherein a proper rescaling of the amplitude of the primary sources is also used. In particular, in the first strategy, the GAM(F) is obtained by exploiting homogenization theories. In the second strategy, the GAM(R) is synthesized by exploiting a suitable representation basis for the unknown contrast function, and then simple analytical formulas are used to determine the corresponding GAM(F). The proposed approach is assessed through the synthesis of an antenna generating a Sigma/Delta reconfigurable pattern.