A genetic algorithm approach to the design of ultra‐thin electromagnetic bandgap absorbers

TLDR

Recent work proposes placing a resistive sheet near a frequency‑selective surface acting as an artificial magnetic conductor. The study presents a design methodology that uses a lossy frequency‑selective surface to eliminate the resistive sheet and achieve ultra‑thin electromagnetic bandgap absorbers. A genetic algorithm optimizes the geometry and resistance of the lossy frequency‑selective surface to produce the thinnest absorber. The approach eliminates the need for a separate resistive sheet, reduces absorber thickness, and the authors demonstrate two genetically engineered examples. © 2003 Wiley Periodicals, Inc., Microwave Opt Technol Lett 38:61–64.

Abstract

Abstract A design methodology is presented for utilizing electromagnetic bandgap metamaterials, also known as artificial magnetic conductors, to realize ultra‐thin absorbers. One approach that has recently been proposed is to place a resistive sheet in close proximity to a frequency‐selective surface acting as an artificial magnetic conductor. However, we demonstrate in this paper that incorporating the loss directly into the frequency selective‐surface can eliminate the additional resistive sheet, thereby further reducing the overall thickness of the absorber. The geometrical structure and corresponding resistance of this lossy frequency‐selective surface is optimized by using a genetic algorithm to achieve the thinnest possible absorber. Two examples of genetically engineered electromagnetic bandgap metamaterial absorbers are presented and discussed. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 61–64, 2003