Array pattern nulling by element position perturbations using a genetic algorithm

Tennant, A.; Dawoud, M.M.; Anderson, A.P.

doi:10.1049/el:19940139

Cited by 135 publications

(39 citation statements)

References 3 publications

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“…In fact, it is robust and lesser number of assumptions in the search arena. It is potential in obtaining the solution of complex problems in the design of antennas [14][15][16][17][18]. Some of the researchers [19][20] applied RGA (Real coded Genetic Algorithm) with an aim to reduce sidelobes of asymmetrical linear antenna.…”

Section: Introductionmentioning

confidence: 99%

Pattern Synthesis using Genetic Algorithm for Low Sidelobe Levels

Lakshmi¹,

Raju²

2011

IJCA

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For pattern synthesis of arrays, it is required to find out appropriate weighting vectors to yield a desired radiation pattern. It is well known that several methods for above purpose are available in literature. It is an established fact that when an attempt is made to reduce the first sidelobe level, the beamwidth increases. However, it is of interest in the present work to synthesize an array for a specified first side lobe level without deteriorating the beamwidth. For this purpose, well known analytical technique for array synthesis to control side lobe level, Dolph Chebyshev method is used with the application of WIPL-D Microwave EM software, and the excitation levels are found out. They are also found out using Genetic Algorithm (GA). The weighting vectors are compared in the form of a Table. Using these vectors, the patterns are generated for arrays of different elements. The resultant patterns are compared for the above methods.

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Section: Introductionmentioning

confidence: 99%

Pattern Synthesis using Genetic Algorithm for Low Sidelobe Levels

Lakshmi¹,

Raju²

2011

IJCA

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“…The perturbation method consists of inducing small perturbations in the element positions of a linear uniform array to obtain the desired patterns [34]. Towards this a parent-centric re-combinational operator and a steady-state, elite preserving model genetic algorithm [35] is presented.…”

Section: Introductionmentioning

confidence: 99%

Dual Beam Synthesis Using Element Position Perturbations and the G3-Ga Algorithm

Vaitheeswaran¹

2008

PIER

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Abstract-The position perturbations of linear antenna elements are used for designing non-uniformly spaced reconfigurable antennas radiating with multiple pattern such that the same amplitude distribution and perturbed positions produces either a pencil or a flat topped beam, the difference being dependent upon phase distribution of the array. The perturbation method consists of inducing small perturbations in the element positions of a linear array to obtain the desired patterns and offer the flexibility of simple design and is similar to other adaptive techniques like phase only or phase/amplitude synthesis. The problem of finding the element position perturbations is treated as a non linear problem and has been solved using a the generalized generation gap steady state genetic algorithm (G3-GA) using parent centric crossover. In the G3-GA approach the population diversity versus selection pressure problem considers both the parent selection and the replacement plans of GA. The positionphase synthesis method using the G3-GA approach is compared with the G3-GA phase-only synthesis technique. It is seen that, an optimal set of element-perturbed positions in a constrained position range with uniform amplitude, unequally spaced elements with unequal phases has the potential to overcome the design challenge of phase only syntheses that uses a larger number of elements to get the same desired side lobe level. Further when the main beam is scanned it is found that the proposed method can maintain a sidelobe level .without distortion during beam steering for the angular positions studied.

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“…By assuming that the phase or position perturbations are small, the nulling equations can be linearized. The phase-only control [5,6,9,17,21,22] utilizes the phase shifters while the position-only control [7][8][9][10][11]15] needs a mechanical driving system such as servomotors to move the array elements. Phase-only null synthesizing is less complicated and attractive for the phased arrays since the required controls are available at no extra cost, but it has still common problem.…”

Section: Introductionmentioning

confidence: 99%

Amplitude-Only Pattern Nulling of Linear Antenna Arrays With the Use of Bees Algorithm

Güney¹,

Onay²

2007

PIER

122

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Abstract-An efficient method based on bees algorithm (BA) for the pattern synthesis of linear antenna arrays with the prescribed nulls is presented. Nulling of the pattern is achieved by controlling only the amplitude of each array element. Numerical examples of Chebyshev pattern with the single, multiple and broad nulls imposed at the directions of interference are given to show the accuracy and flexibility of the BA.

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Array pattern nulling by element position perturbations using a genetic algorithm

Cited by 135 publications

References 3 publications

Pattern Synthesis using Genetic Algorithm for Low Sidelobe Levels

Pattern Synthesis using Genetic Algorithm for Low Sidelobe Levels

Dual Beam Synthesis Using Element Position Perturbations and the G3-Ga Algorithm

Amplitude-Only Pattern Nulling of Linear Antenna Arrays With the Use of Bees Algorithm

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