TY  - JOUR
AU  - Jiang, Ling
AU  - Miao, Wei
AU  - Zhang, Wen
AU  - Li, Ning
AU  - Lin, Zhen Hui
AU  - Yao, Qi Jun
AU  - Shi, Sheng-Cai
AU  - Svechnikov, S. I.
AU  - Vakhtomin, Y. B.
AU  - Antipov, S. V.
AU  - Voronov, B. M.
AU  - Kaurova, N. S.
AU  - Gol'tsman, G. N.
PY  - 2006
DA  - 2006//
TI  - Characterization of a quasi-optical NbN superconducting HEB mixer
T2  - IEEE Trans. Microwave Theory Techn.
JO  - IEEE Trans. Microwave Theory Techn.
SP  - 2944
EP  - 2948
VL  - 54
IS  - 7
KW  - NbN HEB mixers
AB  - In this paper, the performance of a quasi-optical NbN superconducting hot-electron bolometer (HEB) mixer, cryogenically cooled by a close-cycled 4-K refrigerator, is thoroughly investigated at 300, 500, and 850 GHz. The lowest receiver noise temperatures measured at the respective three frequencies are 1400, 900, and 1350 K, which can go down to 659, 413, and 529 K, respectively, after correcting the loss and associated noise contribution of the quasi-optical system before the measured superconducting HEB mixer. The stability of the quasi-optical superconducting HEB mixer is also investigated here. The Allan variance time measured with a local oscillator pumping at 500 GHz and an IF bandwidth of 110 MHz is 1.5 s at the dc-bias voltage exhibiting the lowest noise temperature and increases to 2.5 s at a dc bias twice that voltage.
SN  - 0018-9480
UR  - http://ieeexplore.ieee.org/document/1650432/
UR  - https://doi.org/10.1109/TMTT.2006.877450
DO  - 10.1109/TMTT.2006.877450
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1448), last updated on Sun, 16 May 2021 20:46:34 -0500
ID  - Jiang_etal2006
ER  -