Foam Based Luneburg Lens Antenna at 60 GHZ

Abstract

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.

MOT Solution of the PMCHWT Equation for Analyzing Transient Scattering from Conductive Dielectrics

“…The second example is a six-layer Luneburg lens [14]. Thicknesses, permittivities, and conductivities of the layers (from inner to outer) are mm, Development of an MOT-PMCHWT solver for more general dispersive dielectric scatterers is underway.…”

Millimeter-Wave Fresnel Zone Plate Lens with new technological process

“…So the innovated technological process allows to extract air bubbles from the composite by pressing it at 90°C. Depending on the thickness ratio before and after pressing, this process gives the opportunity to control the dielectric constant in order to finally design inhomogeneous structures like FZPL or Luneburg lens for example [12].…”

Flat foam-based Mikaelian lens antenna for millimeter wave applications

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