Homogenization of Microwave Metamaterial Structures Using Full-Wave Solutions and Genetic Algorithms

İBİLİ H., Karaosmanoglu B., ERGÜL Ö. S.

18th Mediterranean Microwave Symposium (MMS), İstanbul, Turkey, 31 October - 02 November 2018, pp.244-246 identifier

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.244-246
  • Keywords: Metamaterials, electromagnetic homogenization, genetic algorithms, split-ring resonators, multilevel fast multipole algorithm, ELECTROMAGNETIC SCATTERING, INTEGRAL-EQUATION, SURFACES
  • Middle East Technical University Affiliated: Yes

Abstract

Metamaterials involve small details that create challenges in their numerical analysis. As commonly practiced, homogenization of such complex structures may simplify and facilitate their numerical solutions. However, homogenization should be performed carefully to avoid excessive modeling errors, especially for finite structures. In this paper, we present accurate homogenization of three-dimensional metamaterials involving split-ring resonators (SRRs). Electromagnetic characteristics of finite SRR structures are found by rigorous optimization via genetic algorithms, while necessary numerical simulations are accurately performed by using the multilevel fast multipole algorithm. The results demonstrate the promising effectiveness of the approach for realistic metamaterial structures.