Millimeter-wave proximity-coupled microstrip antenna on an extended hemispherical dielectric lens

Mall, L.; Waterhouse, R.B.

doi:10.1109/8.982458

Cited by 41 publications

(27 citation statements)

References 16 publications

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“…We assumed in Section II-A that the lens is fed by a point-source (which is not the case here). Of course, open-ended waveguides (e.g., [6]- [8], [26]) or single patches (e.g., [3], [17]- [19], [23]) could have been used instead of a reduced-size antenna array. We voluntarily excluded these two alternatives, in the first case for integration and compactness purposes, and in the second one for experimental reasons (in particular because of blockage and diffraction effects due to the V-type connector and its mechanical holder when using a microstrip antenna).…”

Section: A Requirements and Assumptionsmentioning

confidence: 99%

“…This configuration avoids loss into surface modes [16], makes easier to realize multielement arrays [13], and allows for an easy integration of active circuits at the back of the lens [1]. Aperture-coupled microstrip patch antennas [3], [17] or arrays [18], and proximity-coupled patches [19] can also be used to illuminate the lens. Lenses usually encountered in literature have canonical shapes: single-(e.g., spherical, hyperbolical) or two-surface (e.g., bibyperbolical) lenses for dielectric lens antennas [20], and elliptical or extended hemispherical profiles for substrate lenses [1], [3]- [5], [14]- [16], [18], [19], [21].…”

Section: Introductionmentioning

confidence: 99%

“…Aperture-coupled microstrip patch antennas [3], [17] or arrays [18], and proximity-coupled patches [19] can also be used to illuminate the lens. Lenses usually encountered in literature have canonical shapes: single-(e.g., spherical, hyperbolical) or two-surface (e.g., bibyperbolical) lenses for dielectric lens antennas [20], and elliptical or extended hemispherical profiles for substrate lenses [1], [3]- [5], [14]- [16], [18], [19], [21]. Their basic functionality merely consists in controlling the directivity of the antenna and eventually the gaussicity of the radiated beam [14], [21] by adjusting the extension length of the extended hemisphere.…”

Section: Introductionmentioning

confidence: 99%

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A new accurate design method for millimeter-wave homogeneous dielectric substrate lens antennas of arbitrary shape

Chantraine-Bares

Sauleau

Coq

et al. 2005

IEEE Trans. Antennas Propagat.

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The synthesis and the optimization of three-dimensional (3-D) lens antennas, consisting of homogeneous dielectric lenses of arbitrary shape and fed by printed sources, are studied theoretically and experimentally at millimeter(mm)-wave frequencies. The aim of the synthesis procedure is to find a lens profile that transforms the radiation pattern of the primary feed into a desired amplitude shaped output pattern. This synthesis problem has been previously applied for dielectric lenses and reflectors. As far as we know, we propose, for the first time, to adapt and implement it for the design of substrate lens antennas. The inverse scattering problem is solved in two steps. In the first one, the geometry of the 3-D lens is rigorously derived using geometrical optics (GO) principles. The resulting second-order partial-differential equation is strongly nonlinear and is of the Monge-Ampère (M.A) type. The iterative algorithm implemented to solve it is described in detail. Then, a surface optimization of the lens profile combined with an analysis kernel based on physical optics (PO) is performed in order to comply with the prescribed pattern. Our algorithms are successfully validated with the design of a lens antenna radiating an asymmetric Gaussian pattern at 58.5 GHz whose half-power beamwidth equals 10 in H plane and 30 in E plane. The lens is illuminated by a microstrip 2 2 patch antenna array. Two lens prototypes have been manufactured in Teflon. Before optimization, the measured radiation patterns are in very good agreement with the predicted ones; nevertheless, the 12 dB side lobes and oscillations appearing in the main lobe evidence a strong difference between the desired and measured patterns. This discrepancy is significantly reduced using the optimized lens.

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Section: A Requirements and Assumptionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new accurate design method for millimeter-wave homogeneous dielectric substrate lens antennas of arbitrary shape

Chantraine-Bares

Sauleau

Coq

et al. 2005

IEEE Trans. Antennas Propagat.

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“…Filipovic [7], [8] developed a double-slot antenna placed on a extended hemispherical lens with operated around 246 GHz. Wu [9] designed a two circular polarized (CP) patch fed ellipsoidal lenses at 30 GHz, while Mall [10] showed a proximity-coupled patch fed extended hemispherical lens operated at 38 GHz. In [11] Boriskin applied a numerical method based on the Muller boundary integral equation (BIE) technique in order to analysis the electromagnetic behaviors of an two-dimensional (2D) extended hemi-elliptical silicon lens with radiating aperture under plane wave excitation.…”

Section: Introductionmentioning

confidence: 99%

Patch Fed Planar Dielectric Slab Extended Hemi-Elliptical Lens Antenna

Xue

Fusco

2008

IEEE Trans. Antennas Propagat.

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We present the results of a parametric study devised to allow us to optimally design a patch fed planar dielectric slab waveguide extended hemi-elliptical lens antenna. The lens antenna, 1113 in the lens plane and 0 6 thick, constructed from polystyrene and weighing only 90 g is fabricated and characterized at 28.5 GHz for both single and multiple operating configurations. The lens when optimized for single beam operation achieves 18.5 dB measured gain (85% aperture efficiency), 40 and 4.1 half power beamwidth for E plane and H plane respectively and 10%impedance bandwidth for 10 dB return loss. While for optimized for multiple beam operation it is shown that the lens can accommodate up to 9 feeds and that beam symmetry can be maintained over a scan angle of 27 with a gain of 14.9 to 17.7 dB, and first side lobe levels of 11 to 7 dB respectively. Over the frequency range 26 to 30 GHz the lens maintains a worst case return loss of 10 dB and port to port feed isolation of better than 25 dB. Further it is shown that residual leaked energy from the structure is less than 48 dBm at 1 cm, thus making a low profile enclosure possible. We also show that by simultaneous excitation of two adjacent ports we can obtain difference patterns with null depths of up to 36 dB.

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“…Hemielliptic homogeneous dielectric lens is a key element of many integrated lens antennas in the mm and sub-mm wavelength ranges [1][2][3][4][5][6]. Recent studies of electromagnetic properties of small-size dielectric lenses have proven that their behavior is far from the one predicted in the ray-optics approximation that is a usual and simple lens design tool [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Lens Antenna Size Reduction Due to the Shape Optimization with Genetic Algorithm and Muller Boundary Integral Equations

Boriskin

Sauleau

2006

2006 European Microwave Conference

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We study a two-dimensional (2-D) homogeneous dielectric lens typical for mm and sub-mm wave applications and used to improve the radiation properties of printed antennas or other types of primary sources. We have developed a new computer aided design and optimization tool based on the Muller boundary integral equations and a genetic algorithm. A favorable feature of this algorithm is its guaranteed accuracy and high efficiency in terms of computer time and resources that is achieved due to the use of integral-equation solver as an engine in the optimization routine.Numerical results are presented for a rexolite lens fed by a line source located close to the lens flat bottom. Lens profile is characterized with cubic splines whose node coordinates are optimized to provide the best possible directivity of the source. Both E-and H-polarizations are considered. We demonstrate nontrivial field behavior in small-size dielectric lenses and highlight possible bottlenecks in their numerical synthesis.

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Millimeter-wave proximity-coupled microstrip antenna on an extended hemispherical dielectric lens

Cited by 41 publications

References 16 publications

A new accurate design method for millimeter-wave homogeneous dielectric substrate lens antennas of arbitrary shape

A new accurate design method for millimeter-wave homogeneous dielectric substrate lens antennas of arbitrary shape

Patch Fed Planar Dielectric Slab Extended Hemi-Elliptical Lens Antenna

Dielectric Lens Antenna Size Reduction Due to the Shape Optimization with Genetic Algorithm and Muller Boundary Integral Equations

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