Design and performance of a perforated dielectric Fresnel lens

Petosa, A.; Ittipiboon, A.

doi:10.1049/ip-map:20030267

Cited by 93 publications

(52 citation statements)

References 7 publications

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“…One of the main disadvantages of this lens is that it does not attain the same aperture efficiency as a shaped lens, since it corrects the phase of the feed source only at discrete locations over its aperture, whereas a shaped lens corrects the phase of the feed source at every location [15]. The solution to this problem of degradation in gain, due to phase quantisation errors over the Fresnel lens aperture, is to design the lens to correct the phase at an increased number of locations [16]. One method to accomplish this is to use additional grooves in the dielectric material [17].…”

Section: B Results Of Hfc-gp Based Multilayer Lens Designmentioning

confidence: 99%

Phase compensating dielectric lens design with genetic programming

Sun

Hines

Green

et al. 2007

Int J RF and Microwave Comp Aid Eng

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This article illustrates a microwave dielectric lens design using genetic programming (GP), which, to the best knowledge of the authors, is the first time GP has been applied to design a microwave dielectric lens. A phase-compensating single layer lens and a quarter-wave phase-compensating multilayer dielectric lens, which uses four types of materials and a zoned structure, was designed using GP. The dielectric lens shape was designed using GP strategy, with a random initial shape, to compensate for the phase error of the multilayer dielectric lens and to achieve the required performance. Standard GP (SGP) and hierarchical fair competition genetic programming (HFC-GP) was applied to obtain the solution. The results show that this novel method of microwave lens shape design using GP is both accurate and stable. In addition, the simulation results of using high frequency simulation software (HFSS) are illustrated and compared.

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Section: B Results Of Hfc-gp Based Multilayer Lens Designmentioning

confidence: 99%

Phase compensating dielectric lens design with genetic programming

Sun

Hines

Green

et al. 2007

Int J RF and Microwave Comp Aid Eng

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“…It consists of a set of planar zones cut into a flat piece of low loss dielectric material. The radius of each zone, r n , is given by (1) [10]:…”

Section: B Lensmentioning

confidence: 99%

24-GHz LTCC Fractal Antenna Array SoP With Integrated Fresnel Lens

Ghaffar

Khalid

Salama

et al. 2011

Antennas Wirel. Propag. Lett.

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Abstract-A novel 24 GHz mixed LTCC tape based System-onPackage (SoP) is presented which incorporates a fractal antenna array with an integrated grooved Fresnel lens. The four element fractal array employs a relatively low dielectric constant substrate (CT707, ε r = 6.4) where as the lens has been realized on a high dielectric constant superstrate (CT765, ε r = 68.7). The two (substrate and superstrate) are integrated through four corner posts to realize the required air gap (focal distance). The fractal array alone provides a measured gain of 8.9 dBi. Simulations predict that integration of this array with the lens increases the gain by 6 dB. Measurements reveal that the design is susceptible to LTCC fabrication tolerances. In addition to high gain, the SoP provides a bandwidth of 8%. The high performance and compact size (24 mm x 24 mm x 4.8 mm) of the design makes it highly suitable for emerging wireless applications such as automotive radar front end.

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“…Another method to produce tailored EM properties is by perforating a homogeneous slab with variable hole diameters or separations [9]. Precise machining and tight tolerances are required in this approach, particularly for high frequency applications.…”

Section: Introductionmentioning

confidence: 99%

3D‐printed planar graded index lenses

Zhang

Arya

Pandey

et al. 2016

IET Microwaves, Antennas & Propagation

122

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Abstract:We introduce two flat graded-index (GRIN) lens designs in this paper. First of these is a thick lens which was designed and fabricated by using the 3D-printing technique. Second, a thin Dial-aDielectric (DaD) lens which uses state-of-the-art artificially engineered dielectric materials for design and will be fabricated in future. Both designs overcome the difficulties faced in finding desired commercial off-the-shelf (COTS) materials for 3D-printing lenses. The lenses comprise of several concentric dielectric rings with bespoke relative permittivities for transforming spherical waves into plane waves and vice versa. The 3D-printed thick flat lens is low-cost and light-weight, but provides broadband and high gain performance. Measurement results show that the realized gain of the thick lens is 9-11 dB over the frequency band of 12-18 GHz. The designed DaD lens has the desirable characteristics of low loss, low reflection and broadband properties.

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Design and performance of a perforated dielectric Fresnel lens

Cited by 93 publications

References 7 publications

Phase compensating dielectric lens design with genetic programming

Phase compensating dielectric lens design with genetic programming

24-GHz LTCC Fractal Antenna Array SoP With Integrated Fresnel Lens

3D‐printed planar graded index lenses

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