@Article{Svechnikov_etal1997,
author="Svechnikov, S.
and Gol{\textquoteright}tsman, G.
and Voronov, B.
and Yagoubov, P.
and Cherednichenko, S.
and Gershenzon, E.
and Belitsky, V.
and Ekstrom, H.
and Kollberg, E.
and Semenov, A.
and Gousev, Y.
and Renk, K.",
title="Spiral antenna NbN hot-electron bolometer mixer at submm frequencies",
journal="IEEE Trans. Appl. Supercond.",
year="1997",
volume="7",
number="2",
pages="3395--3398",
optkeywords="NbN HEB mixers",
abstract="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.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=1597), last updated on Tue, 25 May 2021 21:46:53 -0500",
issn="1051-8223",
doi="10.1109/77.622105",
opturl="http://ieeexplore.ieee.org/document/622105/",
opturl="https://doi.org/10.1109/77.622105"
}