ISSTT Proceedings

ISSTT Proceedings

You searched for:search icon

No Keywords
Showing 0 of items from your search. Start over 

Phonon-cooled ultra thin NbN hot electron bolometer mixers at 620 GHz

Authors:
H. Ekström, E. Kollberg, P. Yagoubov, G. Gol'tsman, E. Gershenzon, S. Yngvesson
Abstract:
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. A double-sideband receiver noise temperature less than 1300 K has been obtained with a 3 dB bandwidth of [approx. qual to] 5 GHz. The gain bandwidth is 3.2 GHz. A lower noise temperature of 1100 K has been achieved with an improved set-up. The mixer output noise dominated by thermal fluctuations is about 50-60 K, and the SSB receiver and intrinsic conversion gain is about -18 and -12 dB, respectively. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K.
Categories:
Hot Electron Bolometers
Year:
1997
Session:
1
Full-text:
Download a PDF of this paper.
Page Number(s):
29-35