Side lobe level reduction of thinned concentric elliptical array antenna in vertical and horizontal plane for a desired peak directivity

Misra, Bitan; Mahanti, G. K.

doi:10.1002/jnm.2785

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…In other words, the DOA modeling for array antennas is often determined by this substantial assumption that the array elements contain multi directional and symmetric radiation pattern. In most studies of DOA modeling, the signal source is assumed in the antenna far‐field which of course an improved far‐field radiation characteristic mainly depends on the synthesis of low side lobe level and narrow first null beam width 8–13 . The use of the isotropic and directional array radiation pattern will have different impact on the DOAE accuracy.…”

Section: Introductionmentioning

confidence: 99%

“…In most studies of DOA modeling, the signal source is assumed in the antenna far-field which of course an improved far-field radiation characteristic mainly depends on the synthesis of low side lobe level and narrow first null beam width. [8][9][10][11][12][13] The use of the isotropic and directional array radiation pattern will have different impact on the DOAE accuracy. In, 14 DOA-E by directive elements mounted on the volume surfaces has been discussed.…”

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confidence: 99%

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Modeling and numerical analysis of volume array radiation pattern impact on 2D‐DOA estimation accuracy considering arrays' aperture angle

Sharifi

Rezaei

2023

Int J Numerical Modelling

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This paper tries to obtain the maximum estimation accuracy of 2-dimensional Direction of Arrival (2D-DOA) from the spatial signal resource in the angle approaching the horizon by using the volume arrays pattern synthesizing. For this purpose, the well-known Multiple Signal Classification (MUSIC) and the algorithm Root Mean Square Deviation (RMSD) are used to investigate 2D-DOA estimation accuracy. For accurate design of array structure, the antenna elements' radiation pattern have been considered based on the full-wave simulations along with the mutual coupling and shadow effects. The results show that the volume array structure presented with 13 radiative elements and the two side angles of 30 and 45 degrees has a much better DOA estimation accuracy in all angles especially in angles close to the horizon, compared to the planar array with the same number of radiative elements. Also, at the angle ±90 from broadside the presented volume aperture provides a maximum gain of up to 15.4 dBi, which is much more than the produced gain of planar aperture under the same conditions.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Modeling and numerical analysis of volume array radiation pattern impact on 2D‐DOA estimation accuracy considering arrays' aperture angle

Sharifi

Rezaei

2023

Int J Numerical Modelling

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“…Moreover, this approach can deal with the constraint of the mutual coupling effect. Teaching-learning-based optimization (TLBO), symbiotic organism search (SOS), and multi verse optimization (MVO) methods are chosen because of their proven effectiveness reported in various kinds of literature [10][11][12][13]. The proposed design approach is suitable for effective application in optimal wireless monitoring technologies, biomedical, and health monitoring systems [14].…”

Section: Introductionmentioning

confidence: 99%

Meta-heuristic optimization algorithms for synthesis of reconfigurable hexagonal array antenna in two principle vertical planes

Misra

Mahanti

2021

Int. J. Microw. Wireless Technol.

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This study illustrates the dynamical reconfiguration of a concentric hexagonal antenna array radiation to generate a pencil beam and flat-top beam simultaneously by electronic control in two principle vertical planes under consideration. Both the beams share a common normalized optimal current excitation amplitude distribution while the optimal sets of phase excitation coefficients are varied radically across the hexagons to generate a flat-top beam. The proposed approach is able to solve the underlying multi-objective problem and flexible enough to the efficient implementation of additional design constraints in the considered φ-planes. In this paper, a set of simulation-based examples are presented in an integrated way. The outcomes validate the effectiveness of the stated optimization using meta-heuristic optimization algorithms (teaching–learning-based optimization, symbiotic organism search, multi-verse optimization) to reach the solution globally and prove actual relevance to the concerned applications.

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“…TLBO is a nature‐inspired optimization technique proposed in 2011, 25 which is based on the teaching‐learning phenomenon of a traditional classroom. The literature survey reveals the potentiality of TLBO to find the solution for different types of constrained and unconstrained design problems 26–28 . Another robust algorithm is symbiotic organism search (SOS), which shows improved performance to solve various design problems 29–32 .…”

Section: Introductionmentioning

confidence: 99%

Reduction of side lobes in the entire azimuth plane in a planar elliptical array antenna

Misra

Mahanti

Panda

2021

Int J Communication

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Summary A novel synthesis method to reduce the maximum side lobe in the entire azimuth plane and for achieving a desired value of directivity of a concentric elliptical array antenna is addressed in this paper. Three well‐performing meta‐heuristic optimization algorithms, teaching learning‐based optimization (TLBO), symbiotic organism search (SOS), and quantum particle swarm optimization (QPSO), are employed to optimize the cost function and to obtain the desired radiation pattern. Different simulation‐based experiments are performed to obtain the best possible set of angular positions and the distribution of isotropic antennas across the ellipses by rigorously maintaining non‐overlapping constraints. The major benefit of the proposed design is the deprecation of interference in all phi planes. The statistical analysis of the simulation results demonstrate perceptible improvement compared with that of a uniformly spaced concentric elliptical array and hence show the efficiency of the proposed algorithms. In both simulation studies, the results obtained using TLBO, SOS, and QPSO are compared. Analysis of the results exhibits that for the stated objective, the TLBO‐ and SOS‐based side lobe reduction approach performs superior to QPSO method. Proposed multi‐objective research work could lead to reduce payload and can simultaneously achieve isoflux coverage in entire azimuth plane on the earth surface which can essentially be utilized in (Low Earth Orbit) LEO and (Geostationary Earth Orbit) GEO satellites applications.

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Side lobe level reduction of thinned concentric elliptical array antenna in vertical and horizontal plane for a desired peak directivity

Cited by 6 publications

References 24 publications

Modeling and numerical analysis of volume array radiation pattern impact on 2D‐DOA estimation accuracy considering arrays' aperture angle

Modeling and numerical analysis of volume array radiation pattern impact on 2D‐DOA estimation accuracy considering arrays' aperture angle

Meta-heuristic optimization algorithms for synthesis of reconfigurable hexagonal array antenna in two principle vertical planes

Reduction of side lobes in the entire azimuth plane in a planar elliptical array antenna

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