Non-uniform sampling and polynomial interpolation for array synthesis

Azevedo, Joaquim Amândio Rodrigues; Casimiro, A.M.E.S.

doi:10.1049/iet-map:20060186

Cited by 2 publications

(6 citation statements)

References 4 publications

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“…To reduce the error below 0.01 dB six iterations for the algorithm were considered. Represented by a dash and a dot line is the result for the approximated real array factor calculated by the method presented in [10]. It was necessary six iterations to produce an error below the referred one.…”

Section: Resultsmentioning

confidence: 99%

“…The sidelobe peaks are the desired points to control the array factor in the sidelobe zone. To determine the peak positions it can be used the procedure developed in [10]. For this, considering that x k is a root of G(x), the corresponding values on the β z variable are β zk = ln(x k )/(jd).…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…Another important application is to impose nulls in prescribed directions of radiation patterns, as it was performed in [10] for real patterns. To obtain a ripple structure with the characteristics reached with complex patterns, the ripple zone must be determined in the same way as it was previously performed.…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…Considering an antenna array with N elements and using the nonuniform sampling technique [10], the array factor that passes through the β zi position with the F (β zi ) value is given by…”

Section: Calculation Of the Sample Phasesmentioning

confidence: 99%

“…Recently, a work has shown the possibility of controlling N array factor points, with N the number of array elements [10]. That technique provides the control of the sidelobe levels and of the ripple amplitude of shaped beam patterns.…”

Section: Introductionmentioning

confidence: 99%

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Shaped Beam Pattern Synthesis With Non-Uniform Sample Phases

Azevedo¹

2008

PIER B

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Abstract-For a long time power pattern synthesis has been considered to produce shaped beam patterns due to the number of degrees of freedom when compared with field pattern synthesis. However, several advantages exist if synthesis techniques are based on field patterns, since the relationship between the array factor and the source distribution is a Fourier transform. In this case, quicker and efficient algorithms are obtained with the Fast Fourier Transform (FFT) to perform the calculations. Therefore, this work presents a new technique that synthesizes shaped beam patterns through the control of non-uniformly samples of the array factor, both in amplitude and phase. The sample phases increase the number of degrees of freedom. To produce complex patterns, the sample phases of the shaped beam region are used to create more oscillations in the ripple structure than the ones produced with the real patterns. Not only this procedure yields a narrower transition region between the beam zone and the sidelobe zone but also smaller dynamic range ratios are obtained. Furthermore, it is described how to impose nulls in prescribed directions of the complex patterns. Some examples are presented to demonstrate the application of the synthesis technique.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Methodsmentioning

confidence: 99%

Section: Synthesis Methodsmentioning

confidence: 99%

Section: Calculation Of the Sample Phasesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shaped Beam Pattern Synthesis With Non-Uniform Sample Phases

Azevedo¹

2008

PIER B

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A Plant Growth Simulation Algorithm for Pattern Nulling of Linear Antenna Arrays by Amplitude Control

Güney

Durmuş²,

Başbuğ³

2009

PIER B

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Abstract-A method based on plant growth simulation algorithm (PGSA) is presented for pattern nulling by controlling only the element amplitudes of linear antenna array. The PGSA is a new and highly efficient random search algorithm inspired by the growth process of plant phototropism. Simulation results for Chebyshev patterns with the imposed single, multiple and broad nulls are given to show the performance of the proposed method.

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Non-uniform sampling and polynomial interpolation for array synthesis

Cited by 2 publications

References 4 publications

Shaped Beam Pattern Synthesis With Non-Uniform Sample Phases

Shaped Beam Pattern Synthesis With Non-Uniform Sample Phases

A Plant Growth Simulation Algorithm for Pattern Nulling of Linear Antenna Arrays by Amplitude Control

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