A Novel Approach for RCS Reduction Using a Combination of Artificial Magnetic Conductors

Cos, M. E. de; Álvarez-López, Yuri; Las-Heras, Fernando

doi:10.2528/pier10060402

Cited by 98 publications

(68 citation statements)

References 24 publications

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“…Several designs for special structures have been proposed to realize broadband RCS reduction at microwave frequencies1415161718192021. Edalati et al .…”

mentioning

confidence: 99%

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Liu

Wei

Yan

et al. 2016

Sci Rep

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A novel broadband and wide-angle 2-bit coding metasurface for radar cross section (RCS) reduction is proposed and characterized at terahertz (THz) frequencies. The ultrathin metasurface is composed of four digital elements based on a metallic double cross line structure. The reflection phase difference of neighboring elements is approximately 90° over a broadband THz frequency. The mechanism of RCS reduction is achieved by optimizing the coding element sequences, which redirects the electromagnetic energies to all directions in broad frequencies. An RCS reduction of less than −10 dB bandwidth from 0.7 THz to 1.3 THz is achieved in the experimental and numerical simulations. The simulation results also show that broadband RCS reduction can be achieved at an incident angle below 60° for TE and TM polarizations under flat and curve coding metasurfaces. These results open a new approach to flexibly control THz waves and may offer widespread applications for novel THz devices.

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“…Several designs for special structures have been proposed to realize broadband RCS reduction at microwave frequencies1415161718192021. Edalati et al .…”

mentioning

confidence: 99%

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Liu

Wei

Yan

et al. 2016

Sci Rep

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“…In order to overcome the intrinsic narrow bandwidth of AMC structure, two AMC structures based on [16,17] are designed, which operate at two different resonance frequencies without overlapped operation bandwidths. The chessboard configuration is used to arrange the AMC unit cells in [15] for reducing the RCS of metal plate, which is different from the design in this paper. The proposed antenna resonant at 4.5 GHz and HAMC structures in this paper cannot cover the operating bandwidth of the patch antenna.…”

Section: Introductionmentioning

confidence: 99%

“…In [13], the mushroom-like EBG was used to reduce RCS of the patch array antenna, and one UC-EBG acted as the ground plane of printed dipole antenna to reduce out-of-band RCS in [14]. A combination of two AMC structures with overlapped operation bandwidths was used to cancel out the backscatter energy in [15], and this method is based on the coupling resonances phenomena [16]. However, these approaches are shown to work well in the normal direction over a relative narrowband.…”

Section: Introductionmentioning

confidence: 99%

Broadband Radar Cross-Section Reduction for Microstrip Patch Antenna Based on Hybrid Amc Structures

Liu¹,

Wang²,

Jia³

et al. 2014

PIER C

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Abstract-Two different kinds of artificial magnetic conductors (AMCs) are used to reduce the out-ofband radar cross section (RCS) of microstrip patch antenna. The principle of this method is based on the high impedance characteristic of the AMC structures. The simulated results show that out-of-band RCS of the proposed patch antenna is much lower than that of the reference antenna over the frequency range of 5-12 GHz. The in-band scattering characteristic of the microstrip patch antenna is analyzed, and two slots are cut on the patch antenna to reduce in-band RCS. Prototypes of the reference and designed antennas are manufactured and tested, and the measured and simulated results of the two antennas are in good agreement.

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“…Provided that the array periodicity is electrically small, as well as the dimension of the individual particle representing the array unit-cell, an HIS can be represented in terms of its homogenized surface impedance [15]. At and around its resonant frequency, an HIS approximately behaves as a perfect magnetic wall, leading to several interesting applications in the antenna field [15][16][17][18][19]. Shape and dimensions of the individual patch element represent the key parameters for the design of an HIS and the synthesis of its frequency response.…”

Section: Introductionmentioning

confidence: 99%

A New Accurate Model of High-Impedance Surfaces Consisting of Circular Patches

Ramaccia¹,

Toscano²,

Bilotti³

2011

PIER M

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Abstract-In this paper, we consider a dense array of metallic circular patches printed on a electrically thin metal-backed dielectric substrate. Since the sub-wavelength dimensions, the array and the metal-backed substrate can be described in terms of a lumped capacitance and a lumped inductance, respectively. Around the resonant frequency, the structure, known as high-impedance surface, reflects totally an incident electromagnetic wave with zero shift in phase. Due to this property, it is widely employed in antenna systems as compact back reflector with improved performances with respect to typical metal reflector. Starting from the concept of the grid capacitive reactance of a planar array of squared patches and its related formulas, we investigate on the field distribution on the array plane and properly modify the formulas for the case of the circular patches. We present two new analytical formulas which can be effectively used for the fast design of 2D-isotropic circular HISs. In order to validate the models, we compare the resonant frequency of the array obtained through our approaches to the one resulting from full-wave numerical simulations and from other analytical methods available in the open technical literature.

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A Novel Approach for RCS Reduction Using a Combination of Artificial Magnetic Conductors

Cited by 98 publications

References 24 publications

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Broadband Radar Cross-Section Reduction for Microstrip Patch Antenna Based on Hybrid Amc Structures

A New Accurate Model of High-Impedance Surfaces Consisting of Circular Patches

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