Metaradome for blind spot mitigation in phased-array antennas

Rodríguez-Ulibarri, Pablo; Beruete, Miguel; Falcone, Francisco; Crepin, T.; Martel, Cédric; Boust, Fabrice; Loecker, Claudius; Herbertz, K.; Salzburg, Carlos Galvis; Bertuch, Thomas; Martinaud, Jean-Paul; Dousset, T.; Marcotegui, Jose Antonio

doi:10.1109/eucap.2014.6902327

Cited by 10 publications

(10 citation statements)

References 5 publications

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“…[70] (2) Omega and reversed-omega elements in the unit cell, improved transmission between 13 and 17 GHz [72] (3) DPS and DNG media, gain increase to 6 dBi, beamwidth reduction by 37.5% [73] (4) Highly transparent at normal incidence, reduced reflection at oblique incidence, no phase change upon transmission [74] (5) Gain enhancement through 9 subwavelength holes by about 3.4 dB [75] (6) A 4-dB improvement in radiation pattern for blind spot angle, wide-angle impedance matching, blind spot mitigation [3] (7) DPS and DNG layers, gain increase by 3.45 dB, increase in the directivity by 2.9 dB, bandwidth improvement [78] (8) Refractive index smaller than unity, CP antenna, 3-dB improvement of the gain, increase of the bandwidth [79] (9) Heat-resistant structure, stable transmission at different incident angles, bandwidth increase from 10 GHz to 12 GHz by changing the size of unit cells [80] (10) Uniaxial medium with large permittivity along the anisotropy axis, operation on the near field, TM polarization transparent, broader radiation pattern, nearly eliminated interference within the cavity [81] (11) Polarization-and frequency-selective metasheets in X and Ka bands [82] (12) Disc-shaped electrically large metasheet, a hybrid approach (PO/FEM) to calculation of transmission [8] …”

Section: Designmentioning

confidence: 99%

“…A metaradome has been designed as a wide-angle impedance matching slab in [3] to alleviate this problem.…”

Section: Designmentioning

confidence: 99%

“…Metamaterials have the advantage of being tunable and tailorable, with a wide range of realizable electromagnetic properties. Such materials can be used to build antenna radomes with improved transparency and even with new features such as the property of being tunable or switchable, thus resulting in a new class of devices: metamaterial radomes or "metaradomes" [2,3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Özis

Osipov

Eibert

2017

International Journal of Antennas and Propagation

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A radome is an integral part of almost every antenna system, protecting antennas and antenna electronics from hostile exterior conditions (humidity, heat, cold, etc.) and nearby personnel from rotating mechanical parts of antennas and streamlining antennas to reduce aerodynamic drag and to conceal antennas from public view. Metamaterials are artificial materials with a great potential for antenna design, and many studies explore applications of metamaterials to antennas but just a few to the design of radomes. This paper discusses the possibilities that metamaterials open up in the design of microwave radomes and introduces the concept of metaradomes. The use of metamaterials can improve or correct characteristics (gain, directivity, and bandwidth) of the enclosed antenna and add new features, like band-pass frequency behavior, polarization transformations, the ability to be switched on/off, and so forth. Examples of applications of metamaterials in the design of microwave radomes available in the literature as well as potential applications, advantages, drawbacks, and still open problems are described.

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Section: Designmentioning

confidence: 99%

“…A metaradome has been designed as a wide-angle impedance matching slab in [3] to alleviate this problem.…”

Section: Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Özis

Osipov

Eibert

2017

International Journal of Antennas and Propagation

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“…Due to their birefringent behaviour, homogeneous anistropic layers can be exploited to match the angular dependence of the active impedance of phased arrays, giving further degrees of freedom in the WAIM layers design [7][8][9]. The definition of proper constraints and cost-function, is essential for the design of anisotropic WAIM layers.…”

Section: Introductionmentioning

confidence: 99%

Diamagneto-Dielectric Anisotropic Wide Angle Impedance Matching Layers for Active Phased Arrays

Silvestri¹,

Cifola²,

Gerini³

2016

PIER B

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Abstract-In this paper, we present the full process of designing anisotropic metamaterial (MM) wide angle impedance matching (WAIM) layers. These layers are used to reduce the scan losses that occur in active phased arrays for large scanning angles. Numerical results are provided to show the improvement in performances that such layers can ensure. The proposed anisotropic MM-WAIM layers achieve an improvement of about 1 dB of more radiated power at θ = 70 • from broadside, in a 13% of fractional bandwidth on the azimuthal plane φ = 90 • . Weaker improvements are obtained in the other azimuthal planes, however keeping the active reflection coefficient below −9 dB for all azimuthal planes up to θ = 60 • and up to θ = 70 • off-axis for planes φ = 45 • , 90 • in the whole operational band.

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“…In our case of study, the presence of grating lobes gives rise to a very steep impedance profile hindering the matching within a wide frequency band and operation angle. The adopted solution is a WAIM metaradome (WAIMM) based on a periodic Jerusalem cross structure [18].…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas

Rodríguez-Ulibarri

Crepin

Martel

et al. 2016

EPJ Applied Metamaterials

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-This paper presents two metamaterial-inspired solutions to mitigate the scan blindness effects in a phased array antenna. In the first solution, portions of a bed of nails are introduced in the radome to prevent the excitation of surface waves. In the second solution, a superstrate metasurface is designed to synthesize a permittivity tensor optimized to achieve a wide angle impedance matching. In both approaches, the numerical simulations are successfully compared with measurements of a phased array antenna prototype with 100 elements. The wire medium-based solution reveals an effective way for reducing the blind-spot in a wide bandwidth, while the metaradome has been found less suitable for the same purpose.

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Metaradome for blind spot mitigation in phased-array antennas

Cited by 10 publications

References 5 publications

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Metamaterials for Microwave Radomes and the Concept of a Metaradome: Review of the Literature

Diamagneto-Dielectric Anisotropic Wide Angle Impedance Matching Layers for Active Phased Arrays

Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas

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