Microwave instrumentation for radio astronomy

被引：24
作者：
Webber, JC [1 ]
Pospieszalski, MW [1 ]
机构：
[1] Natl Radio Astron Observ, Charlottesville, VA 22901 USA
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2002年 / 50卷 / 03期
基金：
美国国家科学基金会;
关键词：
amplifiers; radio astronomy; radio receivers; superconductor-insulator-superconductor mixers;
D O I：
10.1109/22.989982
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：
Radio astronomy is a branch of science that allows observation of natural radio signals from cosmic sources. Microwave techniques are employed in large radio telescope systems in diverse ways. Starting with early vacuum tube receivers at meter wavelengths, low-noise receivers have pushed the leading edge of technology, culminating in present-day receivers employing HFET amplifiers, superconducting tunnel junctions, and other advanced receiving elements. We discuss the principles of such devices, modern receivers, and modern radio telescope systems both operational and under development.
引用
收藏
页码：986 / 995
页数：10
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