Low Noise Hot-Electron Bolometer Mixers for Terahertz Frequencies

被引：0
|
作者：
S. Cherednichenko
V. Drakinskiy
机构：
[1] Chalmers University of Technology,Dep. Microtechnology and Nanoscience
来源：
Journal of Low Temperature Physics | 2008年 / 151卷
关键词：
Hot-electron bolometer; Terahertz; Mixer; NbN; MgB; 07.57 Kp; 85.25 Am; 85.25 Pb;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Hot-electron bolometer (HEB) mixers are used in many low noise heterodyne radio astronomical receivers. Their noise temperature is at the level of 10–15 times the quantum limit. However, their gain bandwidth is a serious limiting factor. Here we review the state of the art of the HEB mixers gain bandwidth for different materials and substrates. We compare the gain bandwidth of HEB mixers made on bulk substrates and thin membranes. Finally, results for MgB2 thin films for broadband HEB mixers are discussed.
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页码：575 / 579
页数：4
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