Gain and noise bandwidth of NbN hot-electron bolometric mixers
作者:
H. Ekstro¨m,
E. Kollberg,
P. Yagoubov,
G. Gol’tsman,
E. Gershenzon,
S. Yngvesson,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 24
页码: 3296-3298
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119143
出版商: AIP
数据来源: AIP
摘要:
We have measured the noise performance and gain bandwidth of 35 Å thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. The best double-sideband receiver noise temperature is less than 1300 K with a 3 dB bandwidth of ≈5 GHz. The gain bandwidth is 3.2 GHz. The mixer output noise dominated by thermal fluctuations is 50 K, and the intrinsic conversion gain is about −12 dB. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K. ©1997 American Institute of Physics.
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