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

遗传编程在超宽带超材料设计和优化中的开发和应用--智力价值拟议工作的目标是：(1)探索超材料技术在电磁学中的应用，并调查超材料技术的基本能力，通过使用遗传编程和真正的3-D结构，而不是传统的多层方法，(2)通过真正的3-D实现研究可能的微型化，以促进超材料在被称为几百兆赫的无人区频段的可能应用，以及(3)利用开发的战略在这些频段开发超宽带(50：1)人造磁导体(AMC)和使用新型轻质柔性图案化材料的吸波接地面。为了创建独特的和非直观的三维超材料结构，这项工作将使用一种新的方法，结合遗传编程(GP)、用于创建三维结构的林登迈尔系统(L系统)和基于脚本的文本几何输入到全波电磁模拟器。我们将使用我们在这一领域早期工作中使用的矩形横向电磁传输线测试室来制造和测试候选超材料几何形状。超材料的性能将通过使用超宽带双极化圆柱形长缝天线阵的天线测量来进一步评估。更广泛的ImpactGP在其他领域取得了独特和相当成功的成果，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在解决方案的基本开发中提供了真实的、受生物启发的见解，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，拟议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，并使人们对超材料技术的能力有更深入的基本了解，特别是在具有挑战性的应用领域，如超宽带天线设计、用于未爆弹药的探地雷达和简易爆炸装置探测，以及在需要在较低微波频率下具有超宽带性能的雷达散射截面(RCS)应用。制定的全球方案将通过互联网传播，并通过出版物进行说明。此外，由此产生的方案和优化方法将被纳入该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.