DocumentCode :
1434542
Title :
Matched Impedance Thin Planar Composite Magneto-Dielectric Metasurfaces
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
Volume :
60
Issue :
4
fYear :
2012
fDate :
4/1/2012 12:00:00 AM
Firstpage :
1910
Lastpage :
1920
Abstract :
A novel methodology is presented for the design synthesis of matched impedance thin planar composite magneto-dielectric metasurfaces. The design synthesis involves optimizing thin, metallo-dielectric metasurfaces comprised of a periodic array of electrically small and rotationally symmetric metallic unit cells which are sandwiched between two thin dielectric layers and backed by a perfectly conducting ground plane. Optimization of the structures is carried out with a genetic algorithm (GA) to obtain a design with electromagnetic properties that are equivalent to a desired matched-impedance homogeneous medium of the same thickness. Optimized design results demonstrate the effectiveness of this new technique in synthesizing thin planar composite matched-impedance magneto-dielectric metasurfaces (MIMDM). To validate the approach, full-wave simulations of the actual metamaterial structure were compared with results obtained by employing an equivalent homogeneous effective medium and found to be in excellent agreement. Several designs are optimized with targeted applications such as substrates for miniaturized patch antennas and electromagnetic absorbing materials.
Keywords :
dielectric materials; electromagnetic wave absorption; impedance matching; metamaterials; microstrip antennas; actual metamaterial structure; electromagnetic absorbing materials; electromagnetic properties; equivalent homogeneous effective medium; genetic algorithm; matched-impedance homogeneous medium; miniaturized patch antennas; perfectly conducting ground plane; rotationally symmetric metallic unit cells; thin dielectric layers; thin planar composite magneto-dielectric metasurfaces; Genetic algorithms; Geometry; Impedance; Magnetic materials; Metamaterials; Permittivity; Surface impedance; Absorbers; genetic algorithm (GA); magneto-dielectrics; metamaterials; small antennas;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2012.2186233
Filename :
6142051
Link To Document :
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