TY  - JOUR
AU  - Kawamura, J.
AU  - Blundell, R.
AU  - Tong, C. yu E.
AU  - Gol’tsman, G.
AU  - Gershenzon, E.
AU  - Voronov, B.
PY  - 1996
DA  - 1996//
TI  - Performance of NbN lattice‐cooled hot‐electron bolometric mixers
T2  - J. Appl. Phys.
JO  - J. Appl. Phys.
SP  - 4232
EP  - 4234
VL  - 80
IS  - 7
KW  - NbN HEB mixers
AB  - The heterodyne performance of lattice‐cooled hot‐electron bolometric mixers is measured at 200 GHz. Superconducting thin‐film niobium nitride strips with ∼5 nm thickness are used as waveguide mixer elements. A double‐sideband receiver noise temperature of 750 K at 244 GHz is measured at an intermediate frequency centered at 1.5 GHz with 500 MHz bandwidth and with 4.2 K device temperature. The instantaneous bandwidth for this mixer is 1.6 GHz. The local oscillator power required by the mixer is about 0.5 μW. The mixer is linear to within 1 dB up to an input power level 6 dB below the local oscillator power. A receiver incorporating a hot‐electron bolometric mixer was used to detect molecular line emission in a laboratory gascell. This experiment unambiguously confirms that the receiver noise temperature determined from Y‐factor measurements reflects the true heterodyne sensitivity.
SN  - 0021-8979
UR  - http://aip.scitation.org/doi/10.1063/1.363304
UR  - https://doi.org/10.1063/1.363304
DO  - 10.1063/1.363304
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1607), last updated on Wed, 26 May 2021 11:07:20 -0500
ID  - Kawamura_etal1996
ER  -