Broadband Radar Cross-Section Reduction Using AMC Technology

Abstract

This paper presents the design, fabrication and characterization of a planar broadband chessboard structure to reduce the radar cross-section (RCS) of an object. The chessboard like configuration is formed by combining two artificial magnetic conductor (AMC) cells. The bandwidth limitations intrinsic to AMC structures are overcome in this work by properly selecting the phase slope versus frequency of both AMC structures. 180 degrees phase difference has been obtained over more than 40% frequency bandwidth with a RCS reduction larger than 10dB. The influence of the incidence angle in the working bandwidth has been performed. A good agreement between simulations and measurements is achieved.

Ultra-Wideband RCS Reduction and Gain Enhancement of Aperture-Coupled Antenna Based on Hybrid-FSS

“…Frequency selective surface (FSS), as a typical artificial composite structure, has been extensively applied in antenna RCSR [9][10][11][12][13][14][15][16]. In [17], a Fabry-Perot cavity antenna based on partially reflecting surface (PRS) technology is proposed.…”

Scattering Fields Control by Metamaterial Device Based on Ultra-Broadband Polarization Converters

“…The planar structure, based on a combination of artificial magnetic conductors (AMC) and perfect conductors in a chessboard like configuration, has shown the possibility of narrow band RCS reduction due to the destructive interference of phase. Then different combinations of several AMCs structures were proposed for broadband RCS reduction [17], [18].…”

Ultra-Broad Band Radar Cross Section Reduction of Waveguide Slot Antenna with Metamaterials

“…Moreover, as application of principle of passive cancellation for electromagnetic (EM) wave, the artificial magnetic conductor (AMC) and perfect electric conductor (PEC) surfaces or two AMCs were combined together for RCS reduction of waveguide slot antenna [4]. Then, two AMCs with different metamaterial structures were theoretically analyzed and easily implemented using the common printed circuit board fabrication methods for ultra-thin and broadband radar absorber material design [1], [5][6][7]. Nevertheless, in those cases, the RCS is reduced in boresight direction but increased in other directions.…”