Bandwidth limit of an ultrathin metamaterial screen

This paper analyzed the bandwidth limit of a class of ultrathin metamaterial screens for reducing reflectivity. The screens consist of arrays of conducting strips or square patches on top of a planar lossy dielectric or magnetic substrate backed by a conducting ground plane. An accurate analytical model has been derived to calculate the reflection coefficients of the screens, which take into account accurately the high order modes between the array and the ground plane. Based on the analytical model, the maximum bandwidth of the screens was explained. The factors determining the maximum bandwidth of the screens were revealed, which can serve as guidelines for the design of the ultrathin metamaterial screens.

[1]  J. Encinar.  Mode-matching and point-matching techniques applied to the analysis of metal-strip-loaded dielectric antennas , 1990 .

[2]  K. Rozanov.  Ultimate thickness to bandwidth ratio of radar absorbers , 2000 .

[3]  D. Werner,et al.  A genetic algorithm approach to the design of ultra‐thin electromagnetic bandgap absorbers , 2003 .

[4]  Sergei A. Tretyakov,et al.  Thin absorbing structure for all incidence angles based on the use of a high‐impedance surface , 2003 .

[5]  S. Tretyakov,et al.  DYNAMIC MODEL OF ARTIFICIAL REACTIVE IMPEDANCE SURFACES , 2003 .

[6]  J. R. Brown,et al.  Squeezing millimeter waves into microns. , 2004, Physical review letters.

[7]  D. Werner,et al.  Magnetic loading of EBG AMC ground planes and ultrathin absorbers for improved bandwidth performance and reduced size , 2006 .

[8]  C. R. Brewitt-Taylor,et al.  Limitation on the bandwidth of artificial perfect magnetic conductor surfaces , 2007 .

[9]  Analysis of wave propagation in stratified structures using circuit analogues, with application to electromagnetic absorbers , 2008 .

[10]  Angle-independent microwave absorption by ultrathin microcavity arrays , 2008 .

[11]  S. Tretyakov,et al.  Simple and Accurate Analytical Model of Planar Grids and High-Impedance Surfaces Comprising Metal Strips or Patches , 2007, IEEE Transactions on Antennas and Propagation.

[12]  R. Vahldieck,et al.  Efficient Procedures for the Optimization of Frequency Selective Surfaces , 2008, IEEE Transactions on Antennas and Propagation.

[13]  M. J. Lockyear,et al.  Thin resonant structures for angle and polarization independent microwave absorption , 2009 .

[14]  L. Kong,et al.  Analysis and Design of an Ultra-Thin Metamaterial Absorber , 2009 .