EAGER:Development and Application of Genetic Programming in Design and Optimization of Ultra-wideband Metamaterials

遗传规划在超宽带超材料设计与优化中的发展与应用(1)通过使用遗传规划和真正的3-D结构，而不是传统的多层方法，探索超材料技术在电磁学中的应用和研究基本能力；(2)通过真正的3-D实现，研究可能的小型化，以促进可能的超材料在几百兆赫的无人区频段中的应用；(3)利用已开发的策略开发超宽带（50:1）人工磁导体（AMC），并在这些频段使用新型柔性轻质图案材料吸收地平面。为了创建独特的非直观的3D超材料结构，这项工作将采用一种新颖的方法，结合遗传规划（GP），一种新的多学科生物启发优化过程，生成优化的计算机程序作为解决方案，lindenmayer系统（L-system）用于创建3D结构，非线性优化和基于脚本文本的几何输入到全波EM模拟器。候选的超材料几何形状将使用我们在该领域早期工作中使用的矩形横向电磁（TEM）传输线测试室进行制造和测试。超宽带双极化圆柱长槽天线阵列的天线测量将进一步评估超材料的性能。更广泛的影响tgp在其他领域产生了独特而相当成功的结果，但在电磁学方面的应用有限，并承诺提供创新的解决方案，特别是在设计超宽带系统和设备时。GP在解决方案的基本发展中提供了真实和生物启发的见解，因此具有指导创新设计的潜力，并为优化电磁结构提供了开辟新天地的途径。因此，拟议的综合和多学科方法旨在利用遗传规划和相关的l -系统提供独特的解决方案，并对超材料技术的能力进行更深入的基本理解，特别是在具有挑战性的应用领域，如超宽带天线设计、用于未爆弹药（UXO）和IED探测的探地雷达。在雷达横截面（RCS）应用中，需要在较低的微波频率下实现超宽带性能。制定的全科医生计划将通过互联网传播，并通过出版物进行介绍。此外，所产生的程序和优化方法将被纳入大学的天线和电磁学课程。

Development and Application of Genetic Programming in Design and Optimization of Ultra-wideband MetamaterialsIntellectual MeritThe objectives of the proposed work are; (1) explore the applications and investigate the fundamental capabilities of the metamaterial technology in electromagnetics through the use of Genetic Programming and true 3-D structures, as opposed to traditional multi-layering approach, (2) Examine possible miniaturization through true 3-D implementation to facilitate possible metamaterials applications in what has been noted as the no man's land frequency bands of a few hundred Megahertz, and (3) Use developed strategies to develop ultra wideband (50:1) Artificial Magnetic Conductor (AMC) and absorbing ground planes using novel flexible lightweight patterned materials in these frequency bands. To create unique and non-intuitive 3D metamaterial structures, this work will employ a novel approach combining Genetic Programming (GP), a novel multidisciplinary bio-inspired optimization procedure generating optimized computer programs as solutions, Lindenmayer-system (L-system) for creating 3-D structures, non-linear optimization, and scripted text-based geometry input to full wave EM simulators. Candidate metamaterial geometries will be fabricated and tested using the rectangular transverse electro-magnetic (TEM) transmission line test chamber that was utilized in our earlier work in this area. The metamaterial performance will be further evaluated with antenna measurements using an UWB dual polarization cylindrical long-slot antenna array. Broader ImpactGP, having produced unique and quite successful results in other fields but has seen limited application in electromagnetics and promises to provide innovative solutions particularly when designing ultra wideband systems and devices. GP provides an authentic and bio-inspired insight in the fundamental development of the solution, thus has the potential for guiding innovative designs, and providing avenues to break new grounds in the optimization of electromagnetic structures. The proposed integrative and multidisciplinary approach, therefore, is aimed at using Genetic Programming and associated L-system to provide unique solutions and lead to more in-depth fundamental understanding of the capabilities of the metamaterial technology particularly in challenging application areas such that ultra wideband antenna designs, ground penetrating radar for Unexploded Ordnance (UXO) and IED detection, and in Radar Cross Section (RCS) applications requiring UWB performance at lower microwave frequencies. The developed GP programs will be disseminated via the Internet and described via publications. Additionally, the resulting programs and the optimization approach will be incorporated into antenna and electromagnetics courses in the University.