Synthesis of Broadband True-3D Metamaterial Artificial Magnetic Conductor Ground Planes Using Genetic Programming
Synthesis of Broadband True-3D Metamaterial Artificial Magnetic Conductor Ground Planes Using Genetic Programming
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DOI：
10.1109/tap.2014.2357416
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发表时间：
2014-11-01
影响因子：
5.7
通讯作者：
Celik, Nuri
中科院分区：
文献类型：
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作者：
Rayno, Jennifer;Iskander, Magdy F.;Celik, Nuri
介绍了用于合成真实 3D 人造磁导体 (AMC) 接地层的遗传编程 (GP) 软件的开发和使用，重点是在不使用吸波材料或磁性材料的情况下实现较低频率响应（特别是在高 VHF 到低 UHF 频段）、薄型宽带设计。金属3D图案嵌入在具有PEC底部的一层或多层基板层中，并且允许单位单元中的图案延伸到相邻单位单元中，从而以更小的单位单元尺寸和厚度实现更低的频率响应。使用开发的 GP 软件合成的四种设计在使用 +/- 90 度反射相位标准时实现的带宽范围为 32.7% 至 71.1%。此外，结果表明，通过参数研究，其中一种设计的中心频率（0 度反射相位）可以从 381.3 MHz 降低到 87.8 MHz，降低了 77%。该小型化设计的方形晶胞尺寸的边缘为 lambda(0)/51，厚度为 83.9 MHz 时的 lambda(0)/61。
The development and use of genetic programming (GP) software to synthesize true-3D artificial magnetic conductor (AMC) ground planes is presented, with the focus on achieving a lower frequency response (particularly in the high VHF to low UHF bands), low-profile, broadband designs without the use of absorbing or magnetic materials. Metallic 3D patterns are embedded in one or more substrate layers with a PEC bottom, and the patterning in the unit cell is allowed to extend into neighboring unit cells, thus achieving a lower frequency response with much smaller unit cell size and thickness. Four designs synthesized using the developed GP software are presented with achieved bandwidths ranging from 32.7% to 71.1% when using the +/- 90 degrees reflection phase criterion. Further, it is shown that through the use of a parametric study, the center frequency (0 degrees reflection phase) of one of the designs can be reduced from 381.3 MHz to 87.8 MHz, which is a 77% reduction. The edge of the square unit cell size for this miniaturized design is lambda(0)/51 and the thickness is lambda(0)/61 at 83.9 MHz.