Evaluation of a Double-Shell Integrated Scanning Lens Antenna

Costa, Jorge R.; Silveirinha, Mário G.; Fernandes, Carlos A.

doi:10.1109/lawp.2008.2008403

Cited by 38 publications

(20 citation statements)

References 10 publications

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“…So, alternatively, two waveguide feeds with equal radiation patterns were implemented: one in Q-band and another in V-band [24] (see Fig. 2).…”

Section: Lens Prototypementioning

confidence: 99%

“…6 and 7 confirmed the validity of the ILASH GO/PO analysis. Actually, this tool has been thoroughly validated against measurements made on several canonical and shaped dielectric lenses [24], [29]. Therefore, the ILASH tool was used to evaluate the lens performance for the rest of the band from 30 to 90 GHz, assuming unchanged feed power pattern given by (12).…”

Section: Lens Prototypementioning

confidence: 99%

See 1 more Smart Citation

Broadband Integrated Lens for Illuminating Reflector Antenna With Constant Aperture Efficiency

Fernandes

Lima

Costa

2010

IEEE Trans. Antennas Propagat.

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Abstract-A new integrated shaped lens antenna configuration is described with frequency stable radiation pattern and phase center position across a broad 1:3 frequency band, which can be used for focal plane reflector feeding in quasi-optical radio telescope systems. The lens is compatible with the integration of ultrawideband uniplanar printed feeds at its base and equally broadband mixing devices, like the Hot Electron Bolometer (HEB), although these are not used in the present work. Measurements on a scaled mm-wave lab prototype have confirmed stable performance versus frequency, with only 1 dB directivity variation, and better than 94% Gaussicity, thanks to the possibility to impose a predefined output radiation pattern template. Simulations were performed to test the illumination of an off-set parabolic reflector by the lens radiation pattern, which confirmed reasonably constant aperture efficiency in the order of 78% across the 100% bandwidth.Index Terms-Broadband stable radiation pattern, broadband stable phase center position, integrated lens antennas, millimeterand submillimeter wave antennas, reflector feed.

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“…So, alternatively, two waveguide feeds with equal radiation patterns were implemented: one in Q-band and another in V-band [24] (see Fig. 2).…”

Section: Lens Prototypementioning

confidence: 99%

Section: Lens Prototypementioning

confidence: 99%

Broadband Integrated Lens for Illuminating Reflector Antenna With Constant Aperture Efficiency

Fernandes

Lima

Costa

2010

IEEE Trans. Antennas Propagat.

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“…They can be glued directly on top of an array of feeds on chip to form a compact stand-alone multibeam antenna. GO-based formulations were developed for double-shell axial-symmetric integrated lenses imposing simultaneously a reduced phase aberration condition for off-axis feed positions and a ray collimation condition for the beams [59], [60]. These lenses can scan up to 5 beamwidths with less than 1.5 dB gain scan loss.…”

Section: Direct Lens Solutionsmentioning

confidence: 99%

“…The first example refers to an integrated multibeam lens antenna intended to produce 3 dB beamwidths on the order of 6°at the 60-GHz band, with high Gaussissity, gain scan loss lower than 1 dB over AE20 scan angle, and complying with a maximum diameter of 70 mm [59]. The lens was required to operate over 40% bandwidth, and thus, the challenge was to minimize internal reflections and to ensure a reasonably stable Gaussian beam shape across the scanned angular interval.…”

Section: Multibeam Lens Antennasmentioning

confidence: 99%

Review of 20 Years of Research on Microwave and Millimeter-wave Lenses at "Instituto de Telecomunicaço˜es"

Fernandes

Costa

Lima

et al. 2015

IEEE Antennas Propag. Mag.

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Starting from a challenge in the early 1990s to develop a highly shaped beam dielectric lens antenna for a pilot 150 Mb/s cellular mobile broadband system operating in the 60-GHz band, several new developments have been accomplished over more than 20 years at Instituto de Telecomunicações [1] in the areas of millimeter-wave shaped dielectric lens antennas and planar metamaterial lenses. We review here a few representative examples with numerical and experimental results, covering applications in mobile broadband communications, radiometry, satellite communications, multigigabit short-range communications, and sublambda near-field target detection.

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“…Moreover, double-shell integrated lenses [19,20], and shaped integrated lens antennas with optimized lens shapes have been studied, e.g., in [13,14]. The planar feed array is integrated to the flat surface of the lens, and the lens enhances the directivity of the relatively low-directivity feed array antenna element.…”

Section: Introductionmentioning

confidence: 99%

Using Optimized Eccentricity Rexolite Lens for Electrical Beam Steering With Integrated Aperture Coupled Patch Array

Karttunen

Säily²,

Lamminen³

et al. 2012

PIER B

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Abstract-Design and measurement results of a beam-steering integrated lens antenna at 77 GHz are presented. An 8-element LTCC aperture coupled patch antenna feed array with a switching network is used to electrically steer the main beam in H-plane. A 100-mm diameter Rexolite (ε r = 2.53) lens is simulated and tested. The eccentricity of the lens is optimized in an earlier work with ray-tracing simulations for improved beam-steering properties compared to the conventional extended hemispherical and elliptical lenses. The beamsteering properties including scan loss, main-beam width and direction, side-lobe levels, directivity, and cross-polarization are analyzed in detail with both simulations and radiation pattern measurements. As expected, the results show that the side-lobe and cross-polarization levels are not predicted accurately with large feed offsets using the ray-tracing simulations. Nevertheless, it is shown that the lens shape can be successfully optimized with the simple and fast ray-tracing simulations. The measured half-power beam-width at 77 GHz is 2.5 • ± 0.2 • up to the largest tested beam-steering angle of 30 • . The optimized eccentricity low permittivity lens results in smaller scan loss than the conventional lenses.

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Evaluation of a Double-Shell Integrated Scanning Lens Antenna

Cited by 38 publications

References 10 publications

Broadband Integrated Lens for Illuminating Reflector Antenna With Constant Aperture Efficiency

Broadband Integrated Lens for Illuminating Reflector Antenna With Constant Aperture Efficiency

Review of 20 Years of Research on Microwave and Millimeter-wave Lenses at "Instituto de Telecomunicaço˜es"

Using Optimized Eccentricity Rexolite Lens for Electrical Beam Steering With Integrated Aperture Coupled Patch Array

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