Ultra-Wideband Aperture Array Element Design for Low Frequency Radio Astronomy

被引：24

作者：

Acedo, Eloy de Lera ^{[1
]}

Razavi-Ghods, Nima ^{[1
]}

Enrique Garcia, Luis ^{[2
]}

Duffett-Smith, Peter ^{[1
]}

Alexander, P. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Carlos III Madrid, Signal Theory & Commun Dept, Madrid 28911, Spain

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2011年 / 59卷 / 06期

关键词：

Antenna arrays; radio astronomy; DOMAIN-DECOMPOSITION METHOD; ELECTROMAGNETIC SCATTERING; CONTINUUM SURVEY; SCAN BLINDNESS; MODEL; SIMULATION; INFINITE; SKY; MHZ;

D O I：

10.1109/TAP.2011.2122218

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：

21st century Radio Astronomy at frequencies below 1 GHz will be dominated by arrays of thousands or millions of elements in configurations which are dense or sparse, regular or random, delivering data to powerful digital back-ends. High performance, specified by parameters such as the effective aperture and system noise temperature, will be crucial to achieve the ambitious survey speeds and sensitivities demanded by astronomers. In this paper we analyze the different trade-offs and difficulties in the design of ultra-wideband array antenna elements for these radio telescopes at frequencies below 500 MHz. Bandwidths of 7:1 are desired while using low-profile elements to keep the overall cost within the budget.

引用

页码：1808 / 1816

页数：9

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