Linear Array Thinning Using Iterative FFT Techniques

A new approach for the synthesis of thinned uniformly spaced linear arrays featuring a minimum sidelobe level is presented. The method is based on the iterative Fourier technique to derive element excitations from the prescribed array factor using successive forward and backward Fourier transforms....

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2008-08, Vol.56 (8), p.2757-2760
Main Author: Keizer, W.P.M.
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna feeds
Antenna theory
Antennas
Antennas and propagation
Aperture antennas
Array antennas
Arrays
Excitation
fast Fourier transform (FFT)
Fourier analysis
Fourier transforms
Iterative methods
Linear antenna arrays
Linear arrays
Phased arrays
Physics
sidelobe control
Space technology
Thinning
Unity
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Description
Summary:A new approach for the synthesis of thinned uniformly spaced linear arrays featuring a minimum sidelobe level is presented. The method is based on the iterative Fourier technique to derive element excitations from the prescribed array factor using successive forward and backward Fourier transforms. Array thinning is accomplished by setting the amplitudes of the largest element excitations to unity and the others to zero during each iteration cycle. The number of turned on elements depends on the array filling factor and the total count of element positions. The effectiveness of the new method will be demonstrated for various 200-element linear arrays and compared with published results.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2008.927580