Design Equation for Multidielectric Fresnel Zone Plate Lens

Hristov, H.D.; Rodríguez, José María Fernández

doi:10.1109/lmwc.2012.2224099

Cited by 48 publications

(36 citation statements)

References 3 publications

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“…Deforming rigid material structures such as air-holes, cube-shaped structures, or material pressing are an apparent material porosity methods to control intrinsic permittivity 1 , 7 , 8 . Among GRIN lenses, Fresnel Zone Plates (FZP), due to their planar merit, reduced weight, ease of fabrication, and cost-effectiveness are relatively more attractive structures to achieve high-gain focus in the millimeter and sub-millimeter wave spectrum 5 , 9 – 12 . Nevertheless, there are only a few studies on controlling the permittivities of phase correction zones with plastic porosity and experimental realization of the planar focus lens geometries.…”

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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“…3. (b)) [22,29]. When the wave-front passes through the lens, the lens imposes a phase difference on the wave.…”

Section: -2-fresnel Lensmentioning

confidence: 99%

“…Example of a Fresnel lens: (a) Multi-dielectric Fresnel zone plate lens and (b) grooved Fresnel zone plate lens[22,29].…”

mentioning

confidence: 99%

Quasi-optical Design of a Millimeter Wave Imaging System 

Jadidi

Eslamimajd

Erfaniyan

et al. 2020

Preprint

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In this paper, we report complete design and simulation of a quasi-optical millimeter wave imaging system with Fresnel lens and horn Antenna using ZEMAX and FEKO softwares, respectively. It is much easier to make a Fresnel lens at millimeter wavelengths compared to spherical and aspherical lenses. The use of Fresnel lens to focus millimeter wave radiation greatly reduces the thickness and also the weight of the focusing element from 25 Kg to 4.5 Kg. A horn antenna with Gaussian profile and corrugated walls at the central frequency of 94 GHz for feeding this system is designed. The symmetry of the designed corrugated Gaussian horn radiation pattern in E and H orthogonal planes, its wide bandwidth as well as its low side lobe levels make it a good candidate for feeding a W band millimeter-wave imaging system. The designed quasi-optical imaging system has low weight with high resolution and can be used to detect hidden objects within a distance of 5 meters with 30 mm resolution in W band at 94 GHz central frequency.

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“…Phase-correcting FZPLs [10] improves the efficiency, replacing the transparentopaque zones by different permittivity dielectrics zones [11] or different grooved zones [12]. An alternative to FZPLs, based on a planar periodic screen at optical frequencies, has been presented [13], although, following the authors, improvement on the efficiency has still to be done.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Offset Fresnel Zone Plate Lenses Characterization

León

Herrán²,

Munoz³

et al. 2014

PIER C

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Abstract-Fresnel Zone Plate Lenses (FZPLs) are transparent-opaque lenses that filter the desirable phase. The centred Fresnel lenses have a strong back radiation towards the feed. In order to solve this drawback, offset feeding or offset pointing lenses are used. In this work, both offset FZPLs are studied using an optical physics method and experimentally characterized in the millimeter band. Two prototypes have been manufactured and measured, presenting a narrow beamwidth. The characteristics of pointing of this beam are studied depending on the feed gain. This work shows the pointing characteristics of the lenses, simply moving the lens in a plane.

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Design Equation for Multidielectric Fresnel Zone Plate Lens

Cited by 48 publications

References 3 publications

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

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

Quasi-optical Design of a Millimeter Wave Imaging System

Millimeter-Wave Offset Fresnel Zone Plate Lenses Characterization

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Design Equation for Multidielectric Fresnel Zone Plate Lens

Cited by 48 publications

References 3 publications

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

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

Quasi-optical Design of a Millimeter Wave Imaging System&nbsp;

Millimeter-Wave Offset Fresnel Zone Plate Lenses Characterization

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Quasi-optical Design of a Millimeter Wave Imaging System