Effective dielectric constant and design of sliced Lüneberg lens

Zouganelis, Georgios; Budimir, D.

doi:10.1002/mop.22751

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…A phase correction is achieved by sub-zones in homogeneous or inhomogeneous medium to realize Fresnel-zones. Sub-zone phase correctors have been suggested by stepped zones thickness and air-holes in homogeneous zone plates 11 – 13 , and distinct permittivity configuration is proposed with multi-dielectric concentric rings in inhomogeneous plates 12 . Cube-shaped material porosity urges the need of analysis to implement planar lens schemes.…”

Section: Introductionmentioning

confidence: 99%

Towards Millimeter-wavelength: Transmission-Mode Fresnel-Zone Plate Lens Antennas using Plastic Material Porosity Control in Homogeneous Medium

Pourahmadazar

Denidni

2018

Sci Rep

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We present two transmission-mode dielectric Fresnel-Zone Plate Lens (FZPL) antennas for use within the V-band spectrum. The proposed FZPs are realized via pure plastic material using two different additive manufacturing processes. The proposed FZP lenses are designed with half (λ/2) and quarter (λ/4) phase correction rings at 60-GHz with 30λ0 diameter, where λ0 is the free-space wavelength. The permittivity effect for lens sub-zones is controlled by material porosity in cube-shaped structures. The 3D printed zone plate lenses are built using additive manufacturing plastic materials with a thickness of λ0 and constant relative permittivities equal to 2.76 and 3.6. Different types of antenna with cosn-like radiation patterns as lens illuminators are analyzed on the vertical plane of the flat lenses to have a high efficiency over the considered operating band. Simulations and experimental measurements show a reasonably close match, therefore allowing for a reliable predictability.

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Section: Introductionmentioning

confidence: 99%

Towards Millimeter-wavelength: Transmission-Mode Fresnel-Zone Plate Lens Antennas using Plastic Material Porosity Control in Homogeneous Medium

Pourahmadazar

Denidni

2018

Sci Rep

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“…The idea was to drill radial holes in a homogeneous dielectric sphere in such a way that their radii change with position in the sphere in order to [7], [8].…”

Section: Introductionmentioning

confidence: 99%

A dielectric lens antenna design by using the effective medium theories

Liu

Yang

Nie

2010

2010 International Symposium on Intelligent Signal Processing and Communication Systems

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The design of a hemispheric dielectric lens antenna using the effective medium theories (EMTs) is presented in this paper. The hemispheric dielectric lens antenna is made of low loss Poly Tetra Fluoro Ethylene (PTFE) with cylindrical air-filled holes drilled. In order to realize the necessary lens dielectric constant the lens antenna is well described by using the Asymmetric Bruggeman's (ABG) formula of the effective medium theory. The antenna is fabricated by drilling numerous holes with diameters sufficiently smaller than the wavelength in the host material. Measured dielectric lens antenna radiation characteristics are in good agreement with the simulated radiation characteristics results.1.

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