Parallel Genetic-Algorithm Optimization of Shaped Beam Coverage Areas Using Planar 2-D Phased Arrays

Villegas, F.J.

doi:10.1109/tap.2007.898601

Cited by 88 publications

(40 citation statements)

References 19 publications

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“…(17)) is directly obtained dividing (15) by (16). The value of LAR of the cells situated at the same distance from φ θ Figure 10.…”

Section: Antenna System Based On Prolate Ellipsoidal Lensmentioning

confidence: 99%

“…Synthesis and characterization of asymmetric beams have been addressed in previous publications [16][17][18]. These contributions were primarily focused on printed antenna arrays, which are not well suited for Ka-band, since it is well known [19][20][21] that the total efficiency of printed arrays including the associated printed feeding networks quickly deteriorates at mm-wave frequencies.…”

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confidence: 99%

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Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

Letizia¹,

Zürcher²,

Mosig³

2013

PIER B

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Abstract-A 3-D shaped prolate ellipsoidal dielectric lens is designed to produce multiple asymmetric beams in Ka-band. Such radiation characteristics are useful in applications where the antenna system is mounted on platforms flying above Earth and the shape of the footprints have to be carefully controlled for different elevation angles. A set of design rules is introduced and the final designs are optimized using full-wave time-domain methods. A fully operational Ka-band antenna subsystem has been prototyped and measured. The final antenna lens has axes lengths of 62.3 mm and 57.8 mm and provides a maximum gain of 21 dB. When mounted on a stabilized platform at the altitude of 21 km (a typical HAPS scenario), this antenna provides 19 circular ground footprints of 5 km diameter each. Radiation pattern measurements show that such a lens reduces the natural beam footprint elongation unavoidable with traditional spherical lenses and confirm the validity of the proposed system.

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“…(17)) is directly obtained dividing (15) by (16). The value of LAR of the cells situated at the same distance from φ θ Figure 10.…”

Section: Antenna System Based On Prolate Ellipsoidal Lensmentioning

confidence: 99%

mentioning

confidence: 99%

Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

Letizia¹,

Zürcher²,

Mosig³

2013

PIER B

View full text Add to dashboard Cite

show abstract

“…Such a problem deserves indeed interest for a number of reasons, the main one being that while a large number of contributions exists in the literature wherein this kind of problems is solved by means of global optimization techniques [4][5][6][7][8], this is not actually needed in a number of cases (as we are going to see below).…”

Section: Introduction and Motivationsmentioning

confidence: 99%

“…In particular, an effective synthesis strategy can be devised as long as the pattern specifications imply 'factorable' or even 'ring-shaped' patterns. Notably, this class of patterns covers a large number of situations of actual interest, such as the synthesis of the elements of Very Large Arrays for Deep Space Applications [4,7], the synthesis of the so-called 'iso-flux' patterns and many others. In all these cases, these approaches are capable to furnish different alternative solutions to the same problem, so that one can eventually 'pick' the more convenient one with respect to some additional performance parameter.…”

Section: Introduction and Motivationsmentioning

confidence: 99%

On the Optimal Synthesis of Ring Symmetric Shaped Patterns by Means of Uniformly Spaced Planar Arrays

Morabito¹,

Laganà²,

Isernia³

2010

PIER B

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Abstract-By taking inspiration from [1], a synthesis strategy is proposed for the case of planar arrays and ring shaped patterns which does not require the exploitation of global optimization procedures. In particular, the approach is able to determine a priori (that is, without solving the overall design problem) whether the given power pattern design constraints can be fulfilled or not, and, in the adfirmative case, to determine the needed excitation coefficients in a fast deterministic manner. Although the approach does not apply to generic planar arrays and generic constraints, it applies to a large number of problems of actual interest, and outperforms some recently published synthesis procedures. Moreover, it may serve both as a reference solution for more general synthesis procedures, and as an elementary brick for more cumbersome synthesis problems.

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“…The shaped radiation patterns are usually realized by controlling the feeding amplitudes and phases of antenna array elements. This problem has received much attention in recent years [4][5][6]. However, most reported literatures regarded the element patterns as identical and isotropic in the array pattern synthesis.…”

Section: Introductionmentioning

confidence: 99%

Design and Realization of a Flat-Top Shaped-Beam Antenna Array

Zhou¹,

Huang²,

Sun³

et al. 2008

PIER Letters

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Abstract-The design and realization of a ten-element shaped-beam antenna array are presented. A flat-top pattern in the main beam which allows a well-proportioned power distribution in desired zone is achieved by optimizing the amplitudes and phases of array elements using genetic algorithm. Being different from the most optimization in reported literatures, the proposed synthesis has taken the actual element patterns but identical and isotropic ones into account, which can reduce the error between computation and realization. Besides, both the optimized amplitudes and phases are set to be realizable. The array operating at 1.71-1.74 GHz is manufactured and measured. The measured radiation patterns of the proposed array show a flattop main beam of about 40 • and a peak side-lobe level of −20 dB, exhibiting a good agreement with the simulated results.

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Parallel Genetic-Algorithm Optimization of Shaped Beam Coverage Areas Using Planar 2-D Phased Arrays

Cited by 88 publications

References 19 publications

Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

Prolate Ellipsoidal Lens for Antenna Systems Providing Multiple Asymmetric Beams

On the Optimal Synthesis of Ring Symmetric Shaped Patterns by Means of Uniformly Spaced Planar Arrays

Design and Realization of a Flat-Top Shaped-Beam Antenna Array

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