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

被引：9

作者：

Yu, Jiwoong ^{[1
]}

Khlebnikov, Vassily A. ^{[1
]}

Ka, Min-Ho ^{[1
]}

机构：

[1] Yonsei Univ, Sch Integrated Technol, Inchon 406840, South Korea

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2015年 / 63卷 / 09期

关键词：

Aperture synthesis; grating-lobe (GL) suppression; large wideband planar antenna arrays; sparse array antennas; OPTIMIZATION;

D O I：

10.1109/TAP.2015.2452965

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：3939 / 3946

页数：8

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