A new algorithm for calculating the current distributions of dolph-chebyshev arrays

The sidebands which originate in time modulated arrays can be used for numerous applications, including multipath signal separation and directional power transfer. In the present paper, a method of simultaneously producing a series of beams that are steered towards unique two-dimensional directions is presented by developing the theory of time-modulated linear arrays to time-modulated planar arrays. A planar array is modelled as two linear arrays on orthogonal axes and the binomial and Dolph-Chebyshev time-weighting distributions are applied to a 5 × 5 element array. The output of the array is shown in both the time and frequency domains.

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“…In the present paper, Bresler's method [22] has been used to calculate the individual Dolph-Chebyshev distribution weights.…”

Section: Simultaneous Control Of Sidelobes On Each Sidebandmentioning

confidence: 99%

A Method for Forming Distributed Beams in Time-Modulated Planar Arrays

Clark

Flint

2018

IEEE Trans. Antennas Propagat.

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“…In our approach we make use of a broadside Chebyshev array (Dolph, 1946, Bresler, 1980, Bums et al, 1984, Miaris et al, 1995 by applying the design method of Dolph. Under the constraints of high gain and low SLL the use of the current excitation with Chebyshev distribution is a reasonable choice.…”

Section: Formulationmentioning

confidence: 99%

“…Under the constraints of high gain and low SLL the use of the current excitation with Chebyshev distribution is a reasonable choice. The current excitations can be found from well known techniques, given in the past, (Dolph, 1946, Bresler, 1980, Bums et al, 1984, Miaris et al, 1995. Let RdS be the desired SLL in dB.…”

Section: Formulationmentioning

confidence: 99%

On the Design of a Hybrid-Chebyshev Collinear Folded Dipole Antenna Array

1998

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The arrangement of a Mast-mounted folded dipole antenna array with comer reflectors is considered. The method of moments (MOM) in a wire grid model is used and a suitable optimization procedure is applied.Due to the constraints for high power gain and low SLL the array is designed as a simple broadside Chebyshev one. The presence of 120" comer reflectors change the pattern and makes the array to be a HybridChebyshev one with approximately the same SLL. The distance of the array from the comer of the reflector is critical for the HPBW. Two different types of antennas with 60" and 120" HPBW in the horizontal plane for possible mobile applications are studied.The whole design work is given in a general form, usehl for VHF and UHF communication applications. To ensure the accuracy, two different wire grids for each model are used. In the examples several interesting cases will be analytically presented.

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“…where [1][2][3][4][5][6][7][8][9][10][11][12] is given by equation (39). In preparation for what follows, in equation (39) Allen states that:…”

Section: Random Error Effects On Arrav Directivitvmentioning

confidence: 99%

“…If the Dolph-Chebyshev synthesis is chosen, the user enters the desired side lobe level and the program computes the element weights based on an algorithm presented by Bresler (Ref. 5) and recommended by Bums, Lmpati. and Shelton (Ref.…”

Section: Random Error Effects On Arrav Directivitvmentioning

confidence: 99%

Planar array antenna design analysis

Chrisman¹

Conference Proceedings on Tactical Communications, Vol.1.

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A computer program is presented that can assess the impact of small. random design perturbations on the performance of a planar array antenna of dipoles. Expressions for the expected or average radiation pattem and the change in directivity for a perturbed planar array are developed and used in the program. Translational errors in the positions of the elements, errors in the element's drive amplitude and phase, nonidentical element pattems. and missing elements are accounted for in the expected radiation pattem. The user specifies the array's design parameters to include the number of elements in each direction of the array, interelement spacing, aperture distribution; i.e., DolphChebyshev, Taylor, binomial, uniform, or user defined, the dipole's orientation and length, and the tolerance data. The program calculates data points to allow plotting the radiation pattem in the two principal planes of the array, half-power beamwidths, and directivities for specified scan angles and frequency bandwidth for the design and expected mays. The radiation pattem data can be plotted allowing side lobe comparison between the expected and design arrays. Program results are validated against trends noted in earlier studies on the effects of random errors in arrays. 7 0 5 PLANAR ARRAY ANTENNA DESIGN ANALYSIS Bradley P. Chrisman AFECO/EN WPAFB, OH 45433

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A new algorithm for calculating the current distributions of dolph-chebyshev arrays

Cited by 16 publications

References 5 publications

A Method for Forming Distributed Beams in Time-Modulated Planar Arrays

A Method for Forming Distributed Beams in Time-Modulated Planar Arrays

On the Design of a Hybrid-Chebyshev Collinear Folded Dipole Antenna Array

Planar array antenna design analysis

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