Design Optimization of Multishell Luneburg Lenses

Fuchs, Benjamin; Coq, Laurent Le; Lafond, Olivier; Rondineau, S.; Himdi, Mohamed

doi:10.1109/tap.2006.889849

Cited by 112 publications

(41 citation statements)

References 10 publications

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“…Cross sectional view of a multi-shells lens [7] The different radii (r i ) and permittivities ( i ) of the areas are obtained with the following formulas [11]:…”

Section: Figurementioning

confidence: 99%

“…So, to avoid using different materials as it was done in [11], an innovative technological process is investigated in this paper by pressing a basic piece of foam material in order to obtain the different permittivity values [12]. In this paper, an Airex PXc245 foam material [13] and a ring of Rohacell foam have been used to manufacture the flat Luneburg lens.…”

Section: Technological Process and Lens Manufacturingmentioning

confidence: 99%

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Foam Based Luneburg Lens Antenna at 60 GHZ

Bor¹,

Lafond²,

Merlet³

et al. 2014

PIER Letters

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Abstract-An innovative technological process is investigated to easily manufacture inhomogeneous Luneburg lenses. A unique foam material is drilled and pressed to achieve the different dielectric constant needed to follow the index law inside the lens. The performance of such 60 GHz antenna is described and the antenna prototype is measured in terms of gain and radiation patterns. The results show a good efficiency (60% with a directivity of and demonstrate the feasibility of this kind of Luneburg lens, through the use of a simple technological process. The lens with a diameter of 56mm and a thickness of 3mm operates in the 57-66 GHz bandwidth. The magnitude of S11 parameter is under -10dB in the whole bandwidth and an half-power beamwidth of 5° and 50° in H-plane and E-plane respectively is reached.

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“…Cross sectional view of a multi-shells lens [7] The different radii (r i ) and permittivities ( i ) of the areas are obtained with the following formulas [11]:…”

Section: Figurementioning

confidence: 99%

Section: Technological Process and Lens Manufacturingmentioning

confidence: 99%

Foam Based Luneburg Lens Antenna at 60 GHZ

Bor¹,

Lafond²,

Merlet³

et al. 2014

PIER Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…This optimization problem has already been addressed by several researchers [17][18][19]. This article provides by the first time an all-encompassing approach, where the original version introduced for the used method of optimization (PSO) allows the optimization of not only the lens shell parameters, but also the pertinent feed parameters, like the half power beamwidth (HPBW) and the lens-to-feed distance (h), as represented in Figure 3.…”

Section: Directivity Maximization Of Luneburg Lensesmentioning

confidence: 99%

Spherical lens antenna designs with particle swarm optimization

Fuchs¹,

Golubovic²,

Skrivervik³

et al. 2010

Microw. Opt. Technol. Lett.

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A design procedure for spherical lens antennas is described. A particle swarm optimization (PSO) algorithm is coupled to a mode matching technique based on spherical wave expansion to analyze the lens antennas. The proposed methodology is applied to three optimization problems using real‐number and binary PSO. First, the maximization of the directivity of Luneburg lens antennas is addressed. Then, amplitude shaped radiation patterns are synthesized by optimizing both amplitude and position of each element of an array that illuminates a lens. Finally, a dual‐beam reconfigurable lens antenna is optimized. By only switching properly the elements of an array, the lens antenna radiates either a directive or a sectoral beam. Numerical comparisons with a full wave commercial software successfully validate the proposed design procedure. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1655–1659, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25278

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“…Especially, Luneburg lenses have been of interest lately. For example, the inhomogeneous refractive index of the Luneburg lens has been realized by drilling electrically small holes into a dielectric [2], by using pressed foam material [3], and by employing several homogeneous shells [4]. On the other hand, the use of metamaterials with negative refractive index for creating a microwave lens has also been discussed recently in [5,6].…”

Section: Introductionmentioning

confidence: 99%