Title :
A Versatile Design Strategy for Thin Composite Planar Double-Sided High-Impedance Surfaces
Author :
Bayraktar, Zikri ; Gregory, Micah D. ; Wang, Xiande ; Werner, Douglas H.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ. (Penn State), University Park, PA, USA
fDate :
6/1/2012 12:00:00 AM
Abstract :
A novel methodology is introduced for the design synthesis of thin planar realizations of volumetric high-impedance or artificial magnetic conducting surfaces (AMC). The design synthesis involves optimization of two different metallic frequency selective surface (FSS) type structures printed on each side of a thin dielectric substrate material. This technique eliminates the need for a complete metallic backplane common in conventional AMC designs, making use of the same dielectric substrate for two high-impedance surfaces; one on each side. Optimization of the FSS unit cell geometries is carried out with a robust genetic algorithm (GA) technique that is combined with a full-wave periodic finite element boundary integral (PFEBI) electromagnetic simulation code for fast and accurate optimization of desired AMC performance at a single frequency or over multiple frequency bands. Several examples of thin AMC ground planes are optimized for use in the X-band. Additional design examples that provide AMC behavior on one side and absorber behavior on the other are also provided. Lastly, an example illustrating the utility of the double-sided AMC separator structure is shown for a design targeting the standard Wi-Fi frequencies of 2.4 GHz and 5.2 GHz.
Keywords :
dielectric materials; electromagnetic waves; finite element analysis; frequency selective surfaces; optimisation; wireless LAN; FSS unit cell geometries; X-band; artificial magnetic conducting surfaces; dstandard Wi-Fi frequency; electromagnetic simulation code; frequency 2.4 GHz; frequency 5.2 GHz; frequency selective surface; full-wave periodic finite element boundary integral; metallic backplane common; optimization; planar double-sided high-impedance surfaces; robust genetic algorithm; thin composite; thin dielectric substrate material; volumetric high-impedance; Frequency selective surfaces; Genetic algorithms; Geometry; Metamaterials; Optimization; Reflection; Surface impedance; Artificial magnetic conductor; genetic algorithm; high-impedance surfaces; optimization;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2194653