NDLI: Array factor approximation using physical optics and simple line integration

Content Provider	IEEE Xplore Digital Library
Author	Colvin, D.H.
Copyright Year	2010
Description	Author affiliation: Raytheon Company, Tewksbury MA, USA (Colvin, D.H.)
Abstract	The computation of the array factor of a large two-dimensional (2D) array aperture can result in a large number of computations; this is prohibitive when implemented in a real or semi-real time environment for modeling or simulation purposes. The Fast Fourier transform (FFT) is commonly used where zero-padding is required to minimize aliased spectral leakage. This paper presents a method of fast computation of the array pattern of a large uniformly distributed excitation of the antenna elements within an arbitrarily shaped aperture. The large 2D array factor may be approximated using physical optics and the Navier-Stokes (NS) closed-line integral (NSLI) provided that the array elements are spaced by less than λ/2. Beam steering is still accommodated utilizing this method. With this method, a uniformly excited array with any aperture shape may be evaluated. Both radiation and monostatic scattering may be addressed using the NSLI method.
Starting Page	833
Ending Page	840
File Size	600875
Page Count	8
File Format	PDF
ISBN	9781424451272
DOI	10.1109/ARRAY.2010.5613265
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Apertures Arrays Electric fields Beam steering Approximation methods Electric potential Current density
Content Type	Text
Resource Type	Article

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