An Efficient Method To Compute The Array Factors Of Non-uniformly
Spaced Arrays
Author(s)
A. M. E. S. Casimiro, X F. Ren & A. J. R. Azevedo
Abstract
An efficient method to compute the array
factors of non-uniformly spaced arrays
A. M. E. S. ~asimiro', X. F. ~ e r ? & A. J. R. ~ z e v e d o ~
I Universidade do Algarve, , Portugal
~niversidade da Madeira, Portugal
Abstract
In this paper, we present one efficient method applying the FFT (Fast Fourier
Transform) algorithms to the computation of non-uniformly spaced antenna
array factors, based on the Fourier relation between the array factor and its
source distribution. As known, the conventional FFT algorithms are only used to
compute the equi-spaced data. Thus, in order to apply them in the computation
of non-uniformly spaced array factors, it is necessary to make some adaptation
for the given array. In this paper, two techniques are presented. In the first, we
use the grid in spatial domain to obtain equal spacing data. The element positions
in the non-uniformly spaced array are set to another equi-spaced array with the
smaller spacing. Then, the conventional FFT algorithm is used to compute
Keywords
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