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

遗传程序设计在超宽带超材料优化设计中的应用研究（1）通过使用遗传编程和真正的3-D结构，探索超材料技术在电磁学中的应用并研究其基本能力，而不是传统的多层方法，（2）通过真正的三维实现来研究可能的小型化，以促进可能的超材料在几百兆赫的无人区频带中的应用，以及（3）使用已开发的策略来开发超宽带（50：1）人工磁导体（AMC）和在这些频带中使用新颖的柔性轻质图案化材料的吸收接地平面。为了创建独特和非直观的3D超材料结构，这项工作将采用一种新的方法，结合遗传编程（GP），一种新的多学科生物启发优化程序，生成优化的计算机程序作为解决方案，Lindenmayer系统（L系统），用于创建3D结构，非线性优化和脚本化的基于文本的几何输入到全波EM模拟器。候选超材料的几何形状将被制造和测试使用矩形横向电磁（TEM）传输线测试室，这是利用我们在这一领域的早期工作。将使用超宽带双极化圆柱形长缝隙天线阵列进行天线测量，进一步评估超材料的性能。更广泛的影响GP，在其他领域产生了独特和相当成功的结果，但在电磁学中的应用有限，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在解决方案的基本开发方面提供了真实的和生物启发的见解，因此具有指导创新设计的潜力，并提供了在电磁结构优化方面开辟新天地的途径。因此，所提出的综合和多学科方法旨在使用遗传编程和相关的L系统来提供独特的解决方案，并导致对超材料技术的能力的更深入的基本理解，特别是在具有挑战性的应用领域，例如超宽带天线设计，用于未爆炸弹药（UXO）和IED检测的探地雷达，以及在需要在较低微波频率下的UWB性能的雷达截面（RCS）应用中。 制定的GP计划将通过互联网传播，并通过出版物进行描述。此外，由此产生的程序和优化方法将被纳入天线和电磁学课程在大学。

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.