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Shaped beam synthesis of concentric ring array antenna using Differential Evolution Algorithm

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 2015年第7期69卷 1025-1031页

作者： Mandal, D. Chatterjee, A. Mondal, T. Bhattacharjee, A. K. Bengal Coll Engn & Technol Dept Elect & Commun Engn Durgapur W Bengal India Natl Inst Technol Goa Dept Elect & Commun Engn Ponda 403401 Goa India Dr BC Roy Engn Coll Dept Elect & Commun Engn Durgapur W Bengal India Natl Inst Technol Dept Elect & Commun Engn Durgapur W Bengal India

A shaped beam synthesis from a concentric ring array has been presented. Two different cases are considered. In the first case, a flat-top beam with desired specification has been generated and in the second case, a cosec(2) beam pattern from the same array configuration is generated. The desired beam pattern in each of the individual case is obtained by finding optimum excitations of the array elements using Differential Evolution (DE) algorithm. Dynamic range ratio (DRR) of the excitation amplitudes are improved by eliminating the weakly excited array elements from the optimized array without distorting the obtained pattern. To illustrate the effectiveness of DE, the two beam-patterns are computed from the same array using Genetic Algorithm (GA) by finding out optimum excitations among the elements. Results clearly show the superiority of DE over GA to handle the proposed problem. (C) 2015 Elsevier GmbH. All rights reserved.

关键词： concentric ring array Cosec(2) pattern Differential Evolution (DE) Dynamic range ratio (DRR) Flattop pattern Genetic Algorithm (GA) Peak sidelobe level (peak SLL) Shaped beam

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Meta-heuristic optimization algorithms for simultaneous optimization of sidelobe level and directivity of uniformly excited concentric ring array antennas

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INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES 2020年第2期12卷 183-192页

作者： Dutta, Kailash Pati Mahanti, G. K. Natl Inst Technol Dept Elect & Commun Engn Durgapur 713209 W Bengal India

This paper proposes the novel application of three meta-heuristic optimization algorithms namely crow search algorithm, moth flame optimization, and symbiotic organism search algorithm for the synthesis of uniformly excited multiple concentric ring array antennas. The objective of this work is to minimize the sidelobe level (SLL) and maximize the peak directivity simultaneously. Three different cases are demonstrated separately with various constraints such as optimal inter-element spacing and/or optimal ring radii. Comparative study of the algorithms using common parameters such as SLL, directivity, first null beam width, best cost, and run time has been reported. Investigation results prove the superiority of case 3 over other cases in terms of directivity and SLL. This work demonstrates the potential of these algorithms.

关键词： concentric ring array Crow search algorithm directivity Moth flame optimization sidelobe levels Symbiotic organism search

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Gravitational search algorithm for synthesis of selectively thinned concentric ring array antenna with minimum sidelobe level and with fixed and variable first null beamwidth

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INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES 2015年第6期7卷 775-781页

作者： Chatterjee, Anirban Mahanti, Gautam Kumar Pathak, Narendra Nath Natl Inst Technol Goa Dept Elect & Commun Engn Farmagudi Ponda India Natl Inst Technol Durgapur Dept Elect & Commun Engn Durgapur India Dr BC Roy Engn Coll Durgapur Dept Elect & Commun Engn Durgapur India

Thinning a large concentric ring array by an evolutionary algorithm needs to handle a large amount of variables. The computational time to find out the optimum elements set increases with the increase of array size. Moreover, thinning significantly reduces the directivity of the array. In this paper, the authors propose a pattern synthesis method to reduce the peak sidelobe level (peak SLL) while keeping first null beamwidth (FNBW) of the array fixed by thinning the outermost rings of the array based on Gravitational Search Algorithm (GSA). Two different cases have been studied. In the first case only the outermost ring of the array is thinned and in the second case the two outermost rings are thinned. The FNBW of the optimized array is kept equal to or less than that of a fully populated, uniformly excited and 0.5 spaced concentric ring array of same number of elements and rings. The directivity of the optimized array for the above two cases are compared with an array optimized by thinning all the rings, while keeping the design criteria same as the above two cases. The optimized array by thinning the outermost rings gives higher directivity over the optimized array by thinning all the rings. Time required for computing the optimum elements state for the above two cases using GSA are shown lesser compared to the optimized array by thinning all the rings using the same algorithm. The peak SLL and the FNBW of the optimized array for the above two cases are also compared with the optimized array by thinning all the rings.

关键词： concentric ring array Directivity First null beamwidth Gravitational Search Algorithm Peak SLL Thinning

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Synthesis of thinned concentric ring array antenna in predefined phi-planes using binary firefly and binary particle swarm optimization algorithm

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 2015年第2期28卷 164-174页

作者： Chatterjee, Anirban Mahanti, G. K. Mahanti, Ananya Natl Inst Technol Goa Dept Elect & Commun Engn Ponda India Natl Inst Technol Dept Elect & Commun Engn Durgapur India

A binary firefly algorithm inspired by the behavior of artificial fireflies has been applied to thin a planar concentric ring array antenna to minimize the peak sidelobe level in a number of predefined phi-planes. Two different cases comprising two different design specifications for the optimized thinned array have been considered. In the first case, the array is thinned to reduce the peak sidelobe level while keeping the first null beamwidth and half power beamwidth of the array below their specified values in all the defined phi-planes. In the second case, peak sidelobe level of the array is reduced regardless of any pre-specified values of first null beamwidth and half power beamwidth. To illustrate the superiority of binary firefly algorithm, the thinning of the array for the two different cases has been compared with binary particle swarm optimization algorithm. Results clearly show the superiority of binary firefly algorithm in finding optimum solutions for both cases. Copyright (c) 2014 John Wiley & Sons, Ltd.

关键词： binary firefly algorithm (BFA) binary particle swarm optimization (BPSO) algorithm concentric ring array first null beamwidth (FNBW) half power beamwidth (HPBW)

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Genetic Algorithm Optimization of a Dual Polarized concentric ring array

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APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL 2019年第5期34卷 815-818页

作者： Ruiz, Pedro Mendes Saenz, Israel D. Hinostroza Guinvarc'h, Regis Haupt, Randy Cent Supelec SONDRA F-91190 Gif Sur Yvette France Colorado Sch Mines Elect Engn & Comp Sci Golden CO 80401 USA

We use a genetic algorithm to minimize the relative sidelobe level (RSLL) of a dual polarized concentric ring array. The optimization variables are the placement of uniformly weight spiral antennas in an aperture with a small area. We optimized a cost function with isotropic sources instated of spiral elements to make the cost function reasonable to evaluate. We developed approaches to calculate a faster cost function and reduce the number of function calls in the optimization. We then calculated the array with an approximation of the element pattern to evaluate its performances.

关键词： concentric ring array genetic algorithms optimization phased array planar array spiral antenna wideband array

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Acoustic Vortex Field Generated by Phased Modulated concentric ring array

Acoustic Vortex Field Generated by Phased Modulated Concentr...

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IEEE International Ultrasonics Symposium (IEEE IUS)

作者： Yue, Jiaxi Zhang, Xiaofeng Shaanxi Normal Univ Coll Phys & Informat Technol Shaanxi Key Lab Ultrason Xian Peoples R China

ISBN: (纸本)9780738112091

Vortex field can be generated by the phase modulated circular transducer array. However, the side lobe of the beam may interfere the transmission and reception of the signals. In order to reduce the influence of side lobe, a phased modulated concentric ring array is proposed in this paper to produce the vortex field with low side lobe. By exploring the far-field radiation patterns of the concentric ring array with different inner circle radius, the number of array elements and the initial phase, we obtain the suitable array arrangement with better radiation pattern. This paper should be of positive significance to the development of underwater sound field detection and identification technology.

关键词： vortex sound field phase modulation concentric ring array sidelobe suppression

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Time-Modulated concentric ring Antenna array for a Wide Coverage Pattern

Time-Modulated Concentric Ring Antenna Array for a Wide Cove...

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IEEE-Antennas-and-Propagation-Society International Symposium

作者： Balderas, Luz I. Reyna, Alberto Panduro, Marco A. Univ Autonoma Tamaulipas UAMR R Reynosa Mexico CICESE Res Ctr Ensenada Bcn Mexico

ISBN: (纸本)9781509028863

this paper contains a design approach of a time-modulated concentric ring array for a global terrestrial coverage. The array is designed by optimizing the time switched sequence of the elements while maintaining uniform amplitude. The array considers disk patches as the elements formulated by the cavity model. The particle swarm optimization is utilized as the synthesis strategy. The resulted array reduces the hardware of the antenna array mounted in a satellite system.

关键词： time-modulated antenna array concentric ring array isoflux radiation

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Constant Elevation-Beamwidth Beamforming With concentric ring arrays

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IEEE-ACM TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING 2024年 32卷 1662-1672页

作者： Peretz, Orel Cohen, Israel Technion Israel Inst Technol Andrew & Erna Viterbi Fac Elect & Comp Engn IL-3200003 Haifa Israel

A hybrid approach is proposed to efficiently design a constant elevation-beamwidth beamforming with concentric ring arrays (CRAs). The design exploits the degrees of freedom of the array geometry for superior performance. In particular, the ring radii and the beamformer coefficients are optimized simultaneously for all frequencies. We introduce a convex quadratic programming problem for a given CRA configuration, directly optimizing the beamformer coefficients while maintaining constant elevation-beamwidth over a wide range of frequencies. The proposed objective function contains a control variable, allowing a tradeoff between the directivity factor and the white noise gain. Subsequently, a hybrid approach is proposed to optimize the ring radii with a genetic algorithm exploiting the partial convexity of the problem. Experimental results demonstrate the flexibility and advantages of the proposed approach compared to the state-of-the-art in terms of directivity factor, white noise gain, sidelobe level, and beamwidth consistency, with reduced resources and a significantly lower computation time.

关键词： Finite impulse response filters array signal processing Transmission line matrix methods Microphone arrays Genetic algorithms Geometry Frequency measurement array processing microphone array concentric ring array constant-beamwidth beamforming frequency-invariant beamforming

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An approach for simplifying a multiple beam-forming network for concentric ring arrays using CORPS

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JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS 2014年第4期28卷 430-441页

作者： Arce, A. Panduro, M. A. Covarrubias, D. H. Mendez, A. L. UASLP Fac Ciencias Zona Univ 78290 San Luis Potosi Mexico CICESE Res Ctr Elect & Telecommun Dept Ensenada 22860 Baja California Mexico UAT Unidad Acad Multidisciplinaria Reynosa Rhode Reynosa 88779 Tamaulipas Mexico

This research work deals with a innovative way to simplify the design of beam-forming networks (BFNs) for multi-beam steerable concentric ring arrays based on coherently radiating periodic structures (CORPS) technology. Mono- and multi-beam design configurations of CORPS-BFN for steerable concentric ring arrays are proposed and analyzed. The complex inputs of the feeding network for these configurations are optimized with the differential evolution algorithm. Simulation results reveal a significant simplification of the feeding network based on CORPS for concentric ring arrays reducing drastically the number of input ports to control each beam in both configurations analyzed.

关键词： beam-forming network concentric ring array coherently radiating periodic structures (CORPS) differential evolution multiple-beam systems beam steering

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A HYBRID ALGORITHM FOR THE SYNTHESIS OF SPARSE concentric ring arrayS 41

A HYBRID ALGORITHM FOR THE SYNTHESIS OF SPARSE CONCENTRIC RI...

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41st National Radio Science Conference (NRSC)

作者： Abdelhay, Magdy A. El-Khamy, Said. E. Int Acad Engn & Media Sci Dept Commun Engn Giza Egypt Alexandria Univ Dept Elect Engn Alexandria Egypt

ISBN: (纸本)9798350349580;9798350349573

This paper proposes a hybrid method to synthesis concentric ring arrays. A hybrid invasive weed optimization (IWO) and convex optimization is used to optimize a concentric continuous current ring (CCCR) array. Here, IWO is used to obtain the optimal ring radii for the continuous current rings, and convex optimization is utilized to optimize the excitation of each ring. The value of the peak sidelobe level (PSLL) is used as the fitness function for the IWO optimization algorithm. After that, a deterministic technique is used to replace each current ring by a ring of discrete antennas. Simulations were conducted, and the results were compared to a stochastic optimization technique and an algorithm based on convex optimization. The results showed that the proposed algorithm can synthesize concentric ring arrays with lower PSLL and less elements.

关键词： antenna arrays convex optimization stochastic optimization concentric ring array

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