Millimeter-Wave Fresnel Zone Plate Lens with new technological process

Barka, André; Bor, Jonathan; Himdi, Mohamed; Lafond, Olivier

doi:10.1017/s1759078716000854

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…The p parameter corresponds to the number of compensations made during a 360 degree phase change. Since this compensation is not complete, the lens will have limited efficiency [31][32][33]. In a Fresnel lens, each groove forms a prism, so Fresnel lens is made up of a set of prisms.…”

Section: -2-fresnel Lensmentioning

confidence: 99%

Quasi-optical design of a millimeter wave imaging system

2021

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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 quasioptical 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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Section: -2-fresnel Lensmentioning

confidence: 99%

Quasi-optical design of a millimeter wave imaging system

2021

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“…Since this compensation is not complete, the lens will have limited efficiency [37][38][39]. In a Fresnel lens, each groove forms a prism, so the Fresnel lens is made up of a set of prisms.…”

Section: -2-fresnel Lensmentioning

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 a complete design and simulation of a quasi-optical millimeter wave imaging system using ZEMAX and FEKO software, respectively. A Fresnel lens and a horn antenna are combined in this this design. Compared to spherical and aspherical lenses, a Fresnel lens can be fabricated much easier at millimeter wavelengths. For focusing millimeter wave radiation, a Fresnel lens can be used to reduce the thickness of the focusing element and to lighten its weight from 25 Kg to 4.5 Kg. A horn antenna with a Gaussian profile and corrugated walls is designed for feeding this system at a central frequency of 94 GHz. The symmetrical radiation pattern of the designed corrugated Gaussian horn in E and H orthogonal planes, its wide bandwidth and low side lobe levels make it a good candidate for feeding a W-band millimeter wave imaging system. The designed quasi-optical imaging system is light-weighted, has high resolution and can be used in detecting hidden objects within a distance of 5 meters with a 30 mm resolution in W-band at a central frequency of 94 GHz.

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“…Unless the lens is very thin, a theoretical analysis of the Fresnel structure can complicate. Therefore, FZPs have been taking place of the Fresnel lenses in recent years [4][5][6][7][8]. The applications of FZPs in millimeter/centimeter wave regions were uncommon in the past, because of their relatively low gain, controlling by shaping side/back lobes, in comparison with that of parabolic reflector antennas [2].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Beam Width Shaping of a Ku-band Horn Antenna using a Diffractive Optic Element and an Electromagnetic Wave Absorber

Teber

2020

Sakarya University Journal of Science

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The feasibility of beam-shaping of a Ku-Band horn as a transmitting (Tx) antenna by mounting two different versions of lenses which are kind of Fresnel Zone Plates (FZP) is studied. The designed and fabricated geometrical structures offer a simpler approach building Fresnel Zone Plates by using an electromagnetic wave absorber and diffractive optic material. The diffractive optic material, paraffin, forms a set of alternating open and opaque annular zones on a flat surface, based on the design principles of Fresnel Zone Plates. An electromagnetic wave absorber covers the top surface of the formed paraffin, but not including the grooves. Thereafter, the Fresnel Zone plates are suitably attached in front of the transmitter horn antenna, located in the far-field region of a receiving antenna. The half-power beam-widths for the horn antenna (unloaded) and with two types of lenses are investigated. The results indicate that Fresnel zone plate structures can play a role suppressing side lobes in H-plane so that the effective radiation is to be significantly concentrated.

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Millimeter-Wave Fresnel Zone Plate Lens with new technological process

Cited by 7 publications

References 10 publications

Quasi-optical design of a millimeter wave imaging system

Quasi-optical design of a millimeter wave imaging system

Quasi-Optical Design of a Millimeter Wave Imaging System

Investigation of Beam Width Shaping of a Ku-band Horn Antenna using a Diffractive Optic Element and an Electromagnetic Wave Absorber

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