Synthesis of Planar Arrays With Elements in Concentric Rings

The circular symmetry of concentric ring arrays becomes an advantage for situations where the radiation patterns are symmetric in the azimuthal direction. For planar arrays with elements in an equispaced grid, the fast Fourier transform can be applied in the calculations involved between the array f...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2011-03, Vol.59 (3), p.839-845
Main Author: Azevedo, J A R
Format: Article
Language:English
Subjects:
Algorithms
Antenna array synthesis
Antenna radiation patterns
Antennas
Apertures
Applied sciences
Arrays
Beams (radiation)
Chebyshev approximation
Exact sciences and technology
Fourier transform
Fourier transforms
Mathematical analysis
Planar arrays
Radiocommunications
Ripples
Sampling
shaped beam antennas
Sidelobes
Telecommunications
Telecommunications and information theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The circular symmetry of concentric ring arrays becomes an advantage for situations where the radiation patterns are symmetric in the azimuthal direction. For planar arrays with elements in an equispaced grid, the fast Fourier transform can be applied in the calculations involved between the array factor and the source distribution. However, for circular arrays the elements are in a non-equispaced grid, making the application of fast computation algorithms difficult. Therefore, two techniques are proposed to synthesize circular arrays. The first one provides the control of the pattern by sampling the array factor. In this case, the fast Fourier transform can be applied. The windows technique is also utilized to control the sidelobe levels and the ripple structure of the shaped beam. The second technique considers the symmetric nature of concentric circular arrays and the control of the array factor is performed imposing some specific points of the pattern.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2010.2102999