New Cooled Feeds for the Allen Telescope Array

被引：7

作者：

Welch, Wm. J. ^{[1
]}

Fleming, Matthew ^{[2
]}

Munson, Chris ^{[3
,4
]}

Tarter, Jill ^{[3
]}

Harp, G. R. ^{[3
]}

Spencer, Robert ^{[2
]}

Wadefalk, Niklas ^{[5
]}

机构：

[1] Univ Calif Berkeley, Grad Sch, Berkeley, CA 94720 USA

[2] Minex Engn Corp, Antioch, CA USA

[3] SETI Inst, Mountain View, CA USA

[4] Millennium Engn & Integrat Co, Moffett Field, CA USA

[5] Low Noise Factory, Molndal, Sweden

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2017年 / 129卷 / 974期

关键词：

extraterrestrial intelligence; instrumentation: detectors; instrumentation: interferometers; telescopes; low noise amplifiers (LNA); antenna feeds;

D O I：

10.1088/1538-3873/aa5d4f

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We developed a new generation of low-noise, broadband feeds for the Allen Telescope Array at the Hat Creek Observatory in Northern California. The new feeds operate over the frequency range 0.9 to 14 GHz. The noise temperatures of the feeds have been substantially improved by cooling the entire feed structure as well as the low-noise amplifiers to 70 K. To achieve this improved performance, the new feeds are mounted in glass vacuum bottles with plastic lenses that maximize the microwave transmission through the bottles. Both the cooled feeds and their low-noise amplifiers produce total system temperatures that are in the range 25-30 K from 1 GHz to 5 GHz and 40-50 K up to 12.5 GHz.

引用

页数：9

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