Super low noise cryoelectronic amplifier for radio astronomy and spectroscopy in a 21.0 - 23.0 GHz range with conversion of frequency into 0.5 - 2.5 GHz
O. D. Poustylnik, A. A. Maksyasheva, O. P. Golovchenko, E. N. Glukhova, E. N. Zdor, A. V. Onopchenko et Y. I. Kishenko
