Phase-Mode Processing for Spherical Antenna Arrays With a Finite Number of Antenna Elements and Including Mutual Coupling

Goossens, Roald; Bogaert, Ignace; Rogier, Hendrik

doi:10.1109/tap.2009.2026300

Cited by 21 publications

(17 citation statements)

References 23 publications

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“…CAAs have been studied in various aspects, such as analytical mathematical modeling of array factor (AF), nonuniform excitation of elements [9], optimization of configuration for beam-forming, high directive applications [10], and optimization of radiation pattern to achieve improved side-lobe levels [11,12]. Works are also carried out towards interelement mutual coupling with limited numbers of antenna elements [13,14] and frequency independent arrays [15]. Recently, Zinka et al have demonstrated various numerical simulations of planar and circular arrays to figure out outcomes of various configuration and excitation [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effect of uniform and Dolph--Chebyshev excitations on the performance of circular array antennas

Narsimman¹,

Choukiker²,

Zinka³

et al. 2017

Turk J Elec Eng & Comp Sci

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This paper presents the design and simulation of microstrip circular antenna arrays and studies the effect of excitation with uniform and Dolph-Chebyshev distribution. With side lobe level of 20 dB and 8 microstrip circular patches, the circular array has been demonstrated with minimum grating lobes. The effects of patch and antenna array length on directivity, radiation patterns, and side lobe are also studied in detail. It is found that these antenna arrays are suitable for radar application.

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Section: Introductionmentioning

confidence: 99%

Effect of uniform and Dolph--Chebyshev excitations on the performance of circular array antennas

Narsimman¹,

Choukiker²,

Zinka³

et al. 2017

Turk J Elec Eng & Comp Sci

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“…Also, the error of array interpolation exists. The mutual coupling effect of a spherical antenna arrays is elaborated as the effect of current density [33]. Due to mutual coupling, currents are induced in all other dipole elements, which in turn influence also the current distribution in the active element.…”

Section: Introductionmentioning

confidence: 99%

A Low Energy Consumption DOA Estimation Approach for Conformal Array in Ultra-Wideband

et al. 2013

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Most direction-of-arrival (DOA) estimation approaches for conformal array suffer from high computational complexity, which cause high energy loss for the direction finding system. Thus, a low energy consumption DOA estimation algorithm for conformal array antenna is proposed in this paper. The arbitrary baseline direction finding algorithm is extended to estimate DOA for a conformal array in ultra-wideband. The rotation comparison method is adopted to solve the ambiguity of direction finding. The virtual baseline approach is used to construct the virtual elements. Theoretically, the virtual elements can be extended in the space flexibility. Four elements (both actual and virtual elements) can be used to obtain a group of solutions. The space angle estimation can be obtained by using sub-array divided technique and matrix inversion method. The stability of the proposed algorithm can be guaranteed by averaging the angles obtained by different sub-arrays. Finally, the simulation results verify the effectiveness of the proposed method with high DOA estimation accuracy and relatively low computational complexity.

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“…Spherical sensor array modal beamforming technology has recently become an important research subject in threedimensional (3-D) source reception, wavefield analysis, source localization, and interference suppression applications for both smart antenna arrays [1][2][3] and acoustic arrays [4][5][6][7][8]. More flexible three-dimensional beam pattern synthesis can be realized than with other standard array geometries, and broadband array processing can be performed using the elegant mathematical framework in the spherical harmonics domain, where the frequency dependent components can be predecoupled from angular dependent spherical harmonics.…”

Section: Introductionmentioning

confidence: 99%

“…For simplification, we have not included the electromagnetic (EM) characteristics in this paper, the reader is referred to [3] for more details about a compact EM model of a spherical antenna array. Since spherical arrays for EM field processing exhibit similar properties as conventional acoustic arrays, in which the spherical Fourier transform can be applied and the frequency dependent components can be effectively pre-decoupled, the approach proposed in this paper can also be applied to the spherical antenna arrays with EM effect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spherical harmonics based optimal minimum sidelobe beamforming for spherical sensor arrays

Sun

Yan

Svensson

et al. 2010

2010 International ITG Workshop on Smart Antennas (WSA)

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We propose an optimal minimum sidelobe modal beamforming approach based on the spherical harmonics decomposition for spherical sensor arrays, which provide the ability of three-dimensional broad-band beampattern synthesis. The spherical harmonics domain array processing problem is expressed with a matrix formulation. The weight vector design problem is written as a multiply constrained problem, so that the resulting beamformer can provide a suitable trade-off among mutually conflicting beamforming objectives, such as the lowest sidelobe level, beamwidth, multi-null steering, robustness and so on. The multiply constrained problem is formulated as a convex form of second-order cone programming which is computationally tractable. The main advantage of this method over classical element-space array processing approaches is that the frequency dependent components can be pre-decoupled and removed from angular depe-ndent spherical harmonics, so the same beampattern could be used over a frequency range with a single set of array weights, and the complexity of broad-band beamforming optimization algorithms can be reduced.

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Phase-Mode Processing for Spherical Antenna Arrays With a Finite Number of Antenna Elements and Including Mutual Coupling

Cited by 21 publications

References 23 publications

Effect of uniform and Dolph--Chebyshev excitations on the performance of circular array antennas

Effect of uniform and Dolph--Chebyshev excitations on the performance of circular array antennas

A Low Energy Consumption DOA Estimation Approach for Conformal Array in Ultra-Wideband

Spherical harmonics based optimal minimum sidelobe beamforming for spherical sensor arrays

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