Transmission Phase Characterizations of Metamaterial Covers for Antenna Application

Abstract

Abstract-Metamaterial covers exhibit inimitable electromagnetic properties which make them popular in antenna engineering. A traditional metamaterial cover has an identical transmission phase for a normally incident plane wave regardless of its polarization state. The purpose of this research is to show the possibility of using a polarization dependent metamaterial cover to change the polarization state of the incident plane wave. Novel polarizationdependent metamaterial (PDMTM) covers, whose transmission phases for two principal polarizations are different, are presented. A full-wave FDTD numerical technique developed by the authors is adopted for the simulations.

A Family of Ultra-Thin, Polarization-Insensitive, Multi-Band, Highly Absorbing Metamaterial Structures

“…Since modern practical applications require more sophisticated characteristics, such as larger bandwidths or multiple bands of operation as well as wide-angle and polarization-independent responses, a significant research has been triggered -and yet to be expected -for the improvement of these absorbers' overall behavior [10][11][12][13][14][15][16][17][18][19]. Apparently, this is a critical issue for various electromagnetic interference/electromagnetic compatibility (EMI/EMC) problems, like radar-cross section minimization from airplanes, steamboats and other vehicles, EMI protection owing to mobile phones and local area networks, light-trapping structures for photovoltaic systems or terahertz imaging devices [20][21][22][23][24][25].…”

Theory and Applications of Metamaterial Covers

“…This interesting feature has been realized by changing the unit cell geometry, such as cutting rectangular holes instead of square holes and changing the relative height difference between the x-and y-directed strips of each layer (Veysi et al, 2011).…”

“…The traditional metamaterial cover uses symmetric square holes so that its transmission phase for normal incidence remains the same regardless of the x-or y-polarization state of the incident plane wave. Therefore, the logical step is to replace the square holes by rectangular ones (Veysi et al, 2011).…”

“…Furthermore, novel polarization-dependent metamaterial (PDMTM) covers, whose transmission phases for two principal polarizations are different, are presented (Veysi et al, 2011). A full-wave Finite Difference Time Domain (FDTD) numerical technique is adopted for the simulations.…”

Design of a Novel Double Negative Metamaterial Absorber Atom for Ku and K Band Applications

“…Electromagnetic (EM) absorbers are recent trends in the field of antenna design, sensing, electromagnetic clocking, low cross-section materials for radar, and stealth technologies for military purposes and thermo-photovoltaic applications [1][2][3][4][5][6][7][8][9][10][11][12]. A perfect metamaterial (MM) absorber [13] is expected to absorb almost the entire EM signal, with very little or none to be reflected back to the source.…”