An investigation of offset-fed beams on the proposed SKA dishes with various degrees of shaping

被引：0

作者：

Lehmensiek, Robert ^{[1
]}

Theron, Isak P. ^{[1
]}

de Villiers, Dirk I. L. ^{[2
]}

机构：

[1] EMSS Antennas Pty Ltd Technopk, ZA-7600 Stellenbosch, South Africa

[2] Univ Stellenbosch, Dept Elect & Elect Engn, Stellenbosch, South Africa

来源：

2015 9th European Conference on Antennas and Propagation (EuCAP) | 2015年

关键词：

reflector antennas; aperture efficiency; radio astronomy;

D O I：

暂无

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：

The SKA dishes will be used with single pixel feeds ( resulting in a single on-axis main beam) as well as phased array feeds that will generate multiple offset beams. The final optics will be shaped to improve the performance of the single pixel systems. This shaping may, however, be to the detriment of the offset beams of the multi-beam systems. It is important to understand the extent of this. A limited set of possible optics candidates for the Square Kilometre Array ( SKA) was recently proposed. This paper investigates the electromagnetic performance of centre-fed and offset-fed feeds on a subset of these classical conic section dual reflector systems and also on shaped versions of these reflectors with various degrees of shaping.

引用

页数：4

共 6 条

[1] de Villiers Dirk I. L., 2012, Proceedings of the 2012 6th European Conference on Antennas and Propagation (EuCAP), P3438, DOI 10.1109/EuCAP.2012.6205977
[2] de Villiers DIL, 2014, IEEE ANTENNAS PROP, P1477, DOI 10.1109/APS.2014.6905064
[3] Dewdney P., 2013, document number SKA-TEL-SKO-DD-001
[4] The Square Kilometre Array
Dewdney, Peter E.
Hall, Peter J.
Schilizzi, Richard T.
Lazio, T. Joseph L. W.
[J]. PROCEEDINGS OF THE IEEE, 2009, 97 (08) : 1482 - 1496
[5] Lehmensiek R, 2014, IEEE ANTENNAS PROP, P1479, DOI 10.1109/APS.2014.6905065
[6] Theron I. P., 2013, IEEE AFRICON

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