Wideband Grating-Lobe Suppression by Rotation of the Phased Array Stations in the SKA Low-Frequency Sparse Aperture Array

A simple cost-effective technique of wideband grating-lobe (GL) suppression by rotation of the phased array antennas is developed for application in a system of low-frequency sparse aperture array (LF-SAA) antennas of the square kilometer array (SKA) radio-telescope. The technique implies using of e...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 63; no. 9; pp. 3939 - 3946
Main Authors Jiwoong Yu, Khlebnikov, Vassily A., Min-Ho Ka
Format Journal Article
LanguageEnglish
Published IEEE 01.09.2015
Subjects
Antenna arrays
aperture synthesis
Apertures
Arrays
Azimuth
grating lobe suppression
Gratings
Large wideband planar antenna arrays
sparse array antennas
Aperture synthesis
grating-lobe (GL) suppression
large wideband planar antenna arrays
sparse array antennas
Online AccessGet full text

Cover

More Information
Summary:A simple cost-effective technique of wideband grating-lobe (GL) suppression by rotation of the phased array antennas is developed for application in a system of low-frequency sparse aperture array (LF-SAA) antennas of the square kilometer array (SKA) radio-telescope. The technique implies using of equal sparse planar circular antennas with the well-tried square lattice (SqL) distribution of the station antenna array sensors, which is known as the best in terms of production costs and maintenance charges. The peak levels of residual GLs in the fringe pattern of most pairs of the rotated antenna array stations do not exceed value of -17 dB over frequencies ranged from 70 to 450 MHz in the case of uniform antenna array element weighting, whereas the maximum levels of residual GLs are reduced to -25 dB when the Hamming weight tapering is applied.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2015.2452965