%0 Journal Article
%T Study of the effect of microwave radiation on the operation of HEB mixers in the terahertz frequency range
%A Ryabchun, S.
%A Tong, C-Y E.
%A Blundell, R.
%A Kimberk, R.
%A Gol'tsman, G.
%J IEEE Trans. Appl. Supercond.
%D 2007
%V 17
%N 2
%@ 1051-8223
%F Ryabchun_etal2007
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1427), last updated on Sun, 16 May 2021 13:01:10 -0500
%X We have investigated the effect of injecting microwave radiation, with a frequency much lower than that corresponding to the energy gap of the superconductor, on the performance of the hot-electron bolometer mixer incorporated into a THz heterodyne receiver. More specifically, we show that exposing the mixer to microwave radiation does not cause a significant rise of the receiver noise temperature and fall of the mixer conversion gain so long as the microwave power is a small fraction of local oscillator power. The injection of a small, but controlled amount of microwave power therefore enables active compensation of local oscillator power and coupling fluctuations which can significantly degrade the gain stability of hot electron bolometer mixer receivers.
%K NbN HEB mixers
%R 10.1109/TASC.2007.898580
%U http://ieeexplore.ieee.org/document/4277685/
%U https://doi.org/10.1109/TASC.2007.898580
%P 391-394