Metallic grating on a periodic anisotropic substrate as a planar Artificial Magnetic Conductor

In this paper; a planar Artificial Magnetic Conductor (AMC) constituted of a metallic grating on a periodic anisotropic substrate is proposed. The characteristics of this structure are investigated with a full-wave computational technique which utilizes the dyadic Green's function computed by means of an equivalent transmission line (TL) model in the spectral domain. The obtained Green's function is used in an integral equation for the surface electric current on the metallic grating. The integral equation is then solved using the Method of Moments (MoM) with appropriate basis and test functions. With the help of the proposed semi-analytical method, different periodic structures on various substrates are analyzed. To verify the computed results, they are compared with previously published ones. Finally, the phase response of the introduced periodic structure is calculated as a function of the optic axis direction of the anisotropic region within the substrate. It is shown that the proposed metallic grating on the periodic anisotropic substrate can perform as a low-profile and broadband planar AMC at lower frequencies.

[1]  Tatsuo Itoh,et al.  A uniplanar compact photonic-bandgap (UC-PBG) structure and its applications for microwave circuit , 1999 .

[2]  Mehdi Veysi,et al.  Compact multi-band printed dipole antenna loaded with single-cell metamaterial , 2012 .

[3]  M. Shahabadi,et al.  Full-wave analysis of lossy anisotropic optical waveguides using a transmission line approach based on a Fourier method , 2006 .

[4]  R. E. Collin,et al.  A Simple Artificial Anisotropic Dielectric Medium , 1958 .

[5]  D. Werner,et al.  The design synthesis of multiband artificial magnetic conductors using high impedance frequency selective surfaces , 2005, IEEE Transactions on Antennas and Propagation.

[6]  Eli Yablonovitch,et al.  A high-impedance ground plane applied to a cellphone handset geometry , 2001 .

[7]  M. Shahabadi,et al.  Broadband Reflectarray Antenna on a Periodically Perforated Substrate , 2016, IEEE Transactions on Antennas and Propagation.

[8]  G. Goussetis,et al.  Tailoring the AMC and EBG characteristics of periodic metallic arrays printed on grounded dielectric substrate , 2006, IEEE Transactions on Antennas and Propagation.

[9]  T. Itoh.  Spectral Domain Immitance Approach for Dispersion Characteristics of Generalized Printed Transmission Lines , 1980 .

[11]  R.F.J. Broas,et al.  An application of high-impedance ground planes to phased array antennas , 2005, IEEE Transactions on Antennas and Propagation.

[12]  Analysis of frequency selective surfaces on electrically and magnetically anisotropic substrates , 2006 .

[13]  Transmission line formulation for the full-wave analysis of two-dimensional dielectric photonic crystals , 2004 .

[14]  C. Balanis.  Advanced Engineering Electromagnetics , 1989 .

[15]  R. Mittra,et al.  Techniques for analyzing frequency selective surfaces-a review , 1988, Proc. IEEE.

[16]  D. Sievenpiper,et al.  High-impedance electromagnetic surfaces with a forbidden frequency band , 1999 .