A Thin Electromagnetic Absorber for Wide Incidence Angles and Both Polarizations

By Olli Luukkonen, F. Costa, C. Simovski, Agostino Monorchio, S. Tretyakov. IEEE Transactions on Antennas and Propagation, 2008

284 citations recorded by the source corpus.

A design for planar electromagnetic absorbers is presented. The performance of this absorber is maintained over a wide incidence angles and for both TE and TM polarization. The absorber is composed of a high-impedance surface comprising an array of patches over a grounded lossy dielectric slab perforated with metallic vias (wire medium). The main contribution of the paper is to demonstrate and practically use the presence of an additional resonance when the plasma frequency of the wire medium in the dielectric substrate is close to the original resonance of the high-impedance surface. The presence of the vias between FSS and the ground plane is discussed both for the case of a high-permittivity absorber and for a low permittivity one, through the derivation of simple and efficient analytical expressions, specifically derived for the problem at hand. We show that the presence of the vias influences the oblique incidence TM absorption, and when properly designed, the insertion of the vias into the absorber structure results in a bandwidth enlargement and higher absorption performance.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/80e7f9051e0328c7c65c68507258722ab8956c06

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In Electronic, Optical and Magnetic Materials

Citations in the corpus

Metasurfaces and their applications (2018, background): “High impedance surfaces have been investigated as microwave absorbers for radar applications [78], with a stable response to different incidence angles for TMpolarized waves [51, 79].”
Thin perfect absorbers for electromagnetic waves: Theory, design, and realizations (2015, unknown): “(20) and (21)].”
Optical absorbers based on strong interference in ultra‐thin films (2016, methodology): “In the RF regime, absorbers such as Salisbury screens [5], in which a resistive sheet is placed a quarter wavelength above a ground plane, and related structures such as Jaumann absorbers [6] and resistively loaded high impedance surfaces [7] [8], have been used for minimizing the radar cross-sectio”
A Triple-Band Ultrathin Metamaterial Absorber With Wide-Angle and Polarization Stability (2015, background): “The better performance of wide incident angle absorption was further obtained by the improved designs in [2], [3], and [5].”
Analysis and Design of Ultra Thin Electromagnetic Absorbers Comprising Resistively Loaded High Impedance Surfaces (2010, background): “The employment of vias results a good solution to enlarge and stabilize the bandwidth of the absorber for oblique TM polarization [23].”