TY  - CONF
AU  - Semenov, A.
AU  - Richter, H.
AU  - Hübers, H-W
AU  - Smirnov, K.
AU  - Voronov, B.
AU  - Gol'tsman, G.
PY  - 2003
DA  - 2003//
TI  - Development of terahertz superconducting hot-electron bolometer mixers
T2  - Proc. 6th European Conf. Appl. Supercond.
BT  - Proc. 6th European Conf. Appl. Supercond.
SP  - 2960
EP  - 2965
VL  - 181
KW  - NbN HEB mixers
AB  - We present recent results of the development of phonon cooled hot-electron bolometric (HEB) mixers for airborne and balloon borne terahertz heterodyne receivers. Three iomportant issues have been addresses: the quality of NbN films the HEB mixers were made from, the spectral properties of the HEB mixers and the local oscillator power required for optical operation. Studies with an atomic force microscope indicate, that the performance of the HEB mixer might have been effected by the microstructure of the NbN film. Antenna gain and noise temperature were investigated at terahertz frequencies for a HEB embedded in either log-spiral or twin-slot feed antenna. Comparison suggests that at frequencies above 3 THz the spiral feed provides better overall performance. At 1.6 THz, a power of 2.5 µW was required from the local oscillator for optimal operation of the HEB mixer.
SN  - 0750309814,  978-0750309813
UR  - https://elib.dlr.de/11123/
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1505), last updated on Tue, 18 May 2021 19:48:37 -0500
ID  - Semenov_etal2003
ER  -