Bandwidth‐Enhanced Metamaterial Absorber Using Electric Field–Driven Lc Resonator For Airborne Radar Applications

The aim of this article is to construct broadband ultra thin absorbers using metamaterials in microwave frequencies (C-band) for lower band surveillance and air defense applications. The frequencies of absorptions have been brought closer by parametric optimization of electric field driven LC structures to give rise to a higher full width at half maxima (FWHM) bandwidth. The FWHM bandwidth of 0.42 GHz with 8.13% has been theoretically observed ranging from 4.94–5.36 GHz. The structure is fabricated and experimentally tested for the normal incidence of electromagnetic wave inside the anechoic chamber. The structure is also investigated for oblique incidence which shows that FWHM bandwidth is maintained upto 40°. The structure is also simulated for different angles of polarization where insignificant shift in frequency is noticed as well as FWHM bandwidth is also maintained upto 30°. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2131–2137, 2013

[1]  David R. Smith,et al.  Electromagnetic parameter retrieval from inhomogeneous metamaterials. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[2]  F. Medina,et al.  Left-handed-media simulation and transmission of EM waves in subwavelength split-ring-resonator-loaded metallic waveguides. , 2002, Physical review letters.

[3]  David R. Smith,et al.  Full-wave simulations of electromagnetic cloaking structures. , 2006, Physical review. E, Statistical, nonlinear, and soft matter physics.

[4]  K. V. Srivastava,et al.  An ultra thin metamaterial absorber using electric field driven LC resonator with meander lines , 2012, Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation.

[5]  N. K. Agrawal,et al.  Characterization of M-type barium hexagonal ferrite-based wide band microwave absorber , 2004 .

[6]  T. Cui,et al.  Ultrathin multiband gigahertz metamaterial absorbers , 2011 .

[7]  Willie J Padilla,et al.  Perfect metamaterial absorber. , 2008, Physical review letters.

[8]  Ekmel Ozbay,et al.  Radiation properties of a split ring resonator and monopole composite , 2007 .

[9]  F. Wei,et al.  Electromagnetic and microwave absorbing properties of multi-walled carbon nanotubes/polymer composites , 2006 .

[10]  Willie J Padilla,et al.  Composite medium with simultaneously negative permeability and permittivity , 2000, Physical review letters.

[11]  N. Fang,et al.  Sub–Diffraction-Limited Optical Imaging with a Silver Superlens , 2005, Science.

[12]  Filiberto Bilotti,et al.  An SRR based microwave absorber , 2006 .

[13]  T. C. Goel,et al.  Complex permittivity, permeability, and X-band microwave absorption of CaCoTi ferrite composites , 2000 .

[14]  Hua Ma,et al.  Three-Dimensional Metamaterial Microwave Absorbers Composed of Coplanar Magnetic and Electric Resonators , 2009 .

[15]  W. F. Bahret,et al.  The beginnings of stealth technology , 1993 .