TY  - JOUR
AU  - Svechnikov, S.
AU  - Gol'tsman, G.
AU  - Voronov, B.
AU  - Yagoubov, P.
AU  - Cherednichenko, S.
AU  - Gershenzon, E.
AU  - Belitsky, V.
AU  - Ekstrom, H.
AU  - Kollberg, E.
AU  - Semenov, A.
AU  - Gousev, Y.
AU  - Renk, K.
PY  - 1997
DA  - 1997//
TI  - Spiral antenna NbN hot-electron bolometer mixer at submm frequencies
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 3395
EP  - 3398
VL  - 7
IS  - 2
KW  - NbN HEB mixers
AB  - We have studied the phonon-cooled hot-electron bolometer (HEB) as a quasioptical mixer based on a spiral antenna designed for the 0.3-1 THz frequency band and fabricated on sapphire and high resistivity silicon substrates. HEB devices were produced from superconducting 3.5-5 nm thick NbN films with a critical temperature 10-12 K and a critical current density of approximately 10/sup 7/ A/cm/sup 2/ at 4.2 K. For these devices we reached a DSB receiver noise temperature below 1500 K, a total conversion loss of L/sub t/=16 dB in the 500-700 GHz frequency range, an IF bandwidth of 3-4 GHz and an optimal LO absorbed power of /spl sime/4 /spl mu/W. We experimentally analyzed various contributions to the conversion loss and obtained an RF coupling factor of about 5 dB, internal mixer loss of 10 dB and IF mismatch of 1 dB.
SN  - 1051-8223
UR  - http://ieeexplore.ieee.org/document/622105/
UR  - https://doi.org/10.1109/77.622105
DO  - 10.1109/77.622105
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1597), last updated on Tue, 25 May 2021 21:46:53 -0500
ID  - Svechnikov_etal1997
ER  -