RCS Reduction With a Dual Polarized Self-Complementary Connected Array Antenna

Varault, Stefan; Soiron, Michel; Barka, André; Lepage, Anne Claire; Begaud, Xavier

doi:10.1109/tap.2016.2637860

Cited by 18 publications

(12 citation statements)

References 19 publications

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“…This design is directly inspired by the methodology used in the first phase of the project, which focused on an ultra-wideband dual-polarized antenna with low RCS [ 21 ]. The work is carried out in several steps, the first of which uses a pre-dimensioning and optimization tool using transmission line (TL) model [ 22 ], followed by full-wave simulation within the assumption of infinite arrays.…”

Section: Methodsmentioning

confidence: 99%

“…This TL model, initially defined to evaluate the antenna’s performances in receive mode, was presented in detail in [ 21 , 22 ]. In this configuration, the feeding system of the antennas was replaced by equivalent impedance Z Load , and the performance of the antenna was highlighted by the calculation of its radar cross-section (RCS).…”

Section: Methodsmentioning

confidence: 99%

“…These anti-phase metasurfaces are composed of two different elements with 180° reflection phase difference, as in a chessboard-like configuration, to minimize the reflection. Moreover, when the unit cell is self-complementary like a chessboard, it can be used to enlarge the bandwidth with the help of the Babinet principle, like in wideband antenna design [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we present the development of an ultra-wideband and wide-angle metamaterial absorber, developed within the framework of the SAFAS project (self-complementary surface with low signature). The innovative nature of this project is based on the combined use of a self-complementary structure, a metasurface, and a WAIM layer, to make possible a dual polarized self-complementary connected array antenna [ 21 ] and, also, an ultra-wideband and wide-angle metamaterial absorber. This combination of self-complementary structure, metasurface, and WAIM layer, has not been used in the previous cited works [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 20 ], and our objective is to optimize them together in order to obtain an ultra-wideband and wide-angle metamaterial absorber of low thickness.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Wideband and Wide-Angle Microwave Metamaterial Absorber

et al. 2018

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In order to extend the performance of radar absorbing materials, it is necessary to design new structures with wideband properties and large angles of incidence which are also as thin as possible. The objective of this work, realized within the framework of the SAFAS project (self-complementary surface with low signature) is, then, the development of an ultra-wideband microwave absorber of low thickness. The design of such material requires a multilayered structure composed with dielectric layers, metasurfaces, and wide-angle impedance matching layers. This solution has been realized with on-the-shelf materials, and measured to validate the concept. At normal incidence, the bandwidth ratio, defined for a magnitude of the reflection coefficient below −10 dB, is 4.7:1 for an absorber with a total thickness of 11.5 mm, which corresponds to λ/7 at the lowest operating frequency. For an incidence of 60°, this bandwidth ratio is reduced to 3.8:1, but the device remains ultra-wideband.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultra-Wideband and Wide-Angle Microwave Metamaterial Absorber

et al. 2018

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“…The absorber under study has been designed in the framework of a previous study called SAFAS (Selfcomplementary surface with low signature) [6], [7]. It is composed of three dielectric layers separated by two FSS, which are located above a ground plane ( Fig.1-a).…”

Section: Absorbermentioning

confidence: 99%

Analysis and optimization of a wideband metamaterial absorber made of composite materials

et al. 2019

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Using structural composite materials for the fabrication of Radar Absorbing Materials (RAM) allows combining the strong load bearing capability with the radar absorbing functionality in a unique structure. This article shows the possibility to transpose an already existing metamaterial absorber to the domain of composite materials. The dielectric layers of the absorber initially designed with radio-frequency (RF) materials are replaced with fiberreinforced composite materials and their thickness is optimized again. The working principle of the absorber is explained layer by layer on the Smith chart. The performances of the composite absorber are compared against the initial RF design and against other classical absorbers. The composite design has a total thickness of 8.9 mm and achieves a reflection coefficient below-14 dB within the band 4.6 GHz-17.2 GHz at normal incidence. The reflection coefficient remains under-10 dB at oblique incidence up to 45°.

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Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

Saleem

Saifullah

2021

Physica Status Solidi (a)

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A new technique is proposed for designing a low‐scattering 2 × 2 antenna array using strategic coding metasurface ground for wideband bistatic and monostatic backscattered energy level reduction. Two various artificial magnetic conductor (AMC) units cells are organized like a chessboard to obtain an effective 180° ± 37° reflection phase difference over a broadband frequency range. The low‐backscattering microstrip antenna array is achieved based on the destructive interference theory and diffusion property of AMC unit cells. Simulations show that the proposed antenna array has a considerable backscattering field level reduction of 4.7–18 GHz for both the x‐ and y‐polarization incident waves. It should also be noted that the maximum reduction of backscattered energy at a frequency of 7.2 GHz is −18 dB. The bistatic backscattering performance of the antenna is also given at different frequencies. Both a reference and a proposed prototype are fabricated, and the results are analyzed. Measurements of the fabricated prototype coincide well with simulations.

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RCS Reduction With a Dual Polarized Self-Complementary Connected Array Antenna

Cited by 18 publications

References 19 publications

Ultra-Wideband and Wide-Angle Microwave Metamaterial Absorber

Ultra-Wideband and Wide-Angle Microwave Metamaterial Absorber

Analysis and optimization of a wideband metamaterial absorber made of composite materials

Coding Artificial Magnetic Conductor Ground and Their Application to High‐Gain, Wideband Radar Cross‐Section Reduction of a 2×2 Antenna Array

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