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

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

doi:10.1051/epjam/2016010

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Moreover, the paper by Rodríguez-Ulibarri et al [12] is aimed at presenting two MbD-inspired solutions for the mitigation of the scan blindness in phased array antennas. The proposed strategies are based either on the introduction of portions of a bed of nails are in the radome to prevent the excitation of surface waves, or in the synthesis of a superstrate metasurface to achieve a wide angle impedance matching.…”

mentioning

confidence: 99%

EPJ Applied Metamaterials Special Issue on “Metamaterial-by-Design: Theory, Methods, and Applications to Communications and Sensing”

Massa¹,

Oliveri²

2016

EPJ Applied Metamaterials

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mentioning

confidence: 99%

EPJ Applied Metamaterials Special Issue on “Metamaterial-by-Design: Theory, Methods, and Applications to Communications and Sensing”

Massa¹,

Oliveri²

2016

EPJ Applied Metamaterials

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“…The same potential drawbacks apply to the microstrip patch antenna proposed in [23]. The stacked patch and coupled dipole arrays in [26] and [46], respectively, are loaded by a transmissive metasurface to improve their scanning capabilities. However, the losses in these metamaterial-based WAIM layers may impair their scalability for high-gain antenna arrays as a result of the low element gain.…”

Section: Comparison With State-of-the-artmentioning

confidence: 99%

Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element

Chaloun

Gruner

Menzel

2022

IEEE Open J. Antennas Propag.

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A novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate the dispersion characteristics in the aperture plane. In contrast with its conventional cavity antenna counterpart, the proposed stub-loaded unit cell element shows through scattering and eigenmode analysis that the vertical stubs may effectively enhance the antenna's wide-angle scan performance by preventing the onset of surface and leaky wave resonances. Owing to this additional design freedom, an element gain improvement of at least 1 dB is achieved, due to a truly TE and TM mode-free characteristic along the lateral directions. A dual-polarized 11×11 array prototype was implemented. The measurement results are in very good agreement with those obtained by full-wave simulations. The realized stub-loaded cavity element exhibits reflection coefficients lower than −10 dB with a very low inter-port coupling <−40 dB across the frequency range from 26.8 GHz to 32.7 GHz. Moreover, the co-polarized embedded elements are close to the ideal cos(ϑ)-pattern for 60°E-and H-plane scans from 28 GHz to 31.5 GHz without oversampling the aperture.INDEX TERMS Planar phased arrays, dual-polarized cavity antenna, scan blindness, SatCom on the move

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“…Conventional solutions to tackle coupling problems are based on the reduction of electromagnetic interactions between the array sources. They generally consist in using shielding [3] or metamaterial (such as Electromagnetic Band-Gap or Defected Ground Structures) placed between array sources, in the substrate or in a radome [4][5]. However, these solutions generally lead to complicated, large-area structures, or tend to deteriorate gain and front-to-back ratio of the array [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of a Correcting Coupling Mechanism to Extend the Scanning Range of Narrowband Phased Array Antennas

Manga

Gillard

Loison

et al. 2020

IEEE Trans. Antennas Propagat.

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This paper presents a technique designed to extend the scanning range of a probe-fed patch array whose performances are limited by scan blindness, due to a strong surface wave coupling. The current framework relates to the context of radar applications requiring a large scanning range (up to 60°) and where no inter-element spacing modification is possible as a result of strong T/R modules integration constraints. The proposed solution is based on the introduction of an additional correcting coupling within the array, by means of microstrip lines connecting the sources two by two. A thorough step-by-step description of the design methodology is introduced. It is then implemented in the case of a single-polarized 10element patch array operating in X band. Simulation results as well as an experimental validation of the concept are presented. They assess the effective improvement of the active impedance matching and realized gain resulting from the use of connecting lines.

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

Cited by 11 publications

References 20 publications

EPJ Applied Metamaterials Special Issue on “Metamaterial-by-Design: Theory, Methods, and Applications to Communications and Sensing”

EPJ Applied Metamaterials Special Issue on “Metamaterial-by-Design: Theory, Methods, and Applications to Communications and Sensing”

Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element

Experimental Validation of a Correcting Coupling Mechanism to Extend the Scanning Range of Narrowband Phased Array Antennas

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