caa a22 4500 477123082 CHVBK 20180405111642.0 cr unu---uuuuu 170330e19970101xx s 000 0 eng 10.1007/BF02677898 doi (NATIONALLICENCE)springer-10.1007/BF02677898 A low-noise cryogenically-cooled 8-12 GHz HEMT Amplifier for future space applications [Elektronische Daten] [Corinne Boutez, Paul Crozat, Valérie Danelon, Michel Chaubet, Pascal Febvre, Gérard Beaudin] A two-stage 8-12 GHz (X-band) cryogenically-cooled Low-Noise Amplifier (LNA) has been developed with a commercial pseudomorphic HEMT on AsGa substrate. In a first step, different commercial transistors have been fully characterized from 300 K to 20 K using a new method to measure the four noise parameters. Preliminary results have allowed the selection of the best device. This enabled the design of the two-stage LNA with the help of a microwave CAD software. In a second step, the LNA has been characterized at 300 K, 30 K and 4 K. As the physical temperature decreased from 300 K to 30 K, the LNA exhibited an average gain increase of 2 dB and as much as a fourfold reduction of noise temperature. A noise figure of 22.5 K and a gain of 23 dB have been achieved at 30 K around 10 GHz. The noise temperature has been furthermore reduced to 20 K by cooling the amplifier at the liquid helium temperature (4.2 K). Different methods to measure the noise characteristics of the amplifier are widely developed in this paper. Plenum Publishing Corporation, 1997 amplifier nationallicence cryogenic nationallicence HEMT nationallicence low-noise nationallicence transistor nationallicence Boutez Corinne DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut Crozat Paul Institut d'Electronique Fondamentale, Univ. Paris Sud, bât. 220, 91405, Orsay, France aut Danelon Valérie Institut d'Electronique Fondamentale, Univ. Paris Sud, bât. 220, 91405, Orsay, France aut Chaubet Michel CNES, 18 Avenue, E. Belin, 31055, Toulouse Cedex, France aut Febvre Pascal DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut Beaudin Gérard DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/1(1997-01-01), 85-99 0195-9271 18:1<85 1997 18 10762 https://doi.org/10.1007/BF02677898 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02677898 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Boutez Corinne DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut NATIONALLICENCE 700 1- Crozat Paul Institut d'Electronique Fondamentale, Univ. Paris Sud, bât. 220, 91405, Orsay, France aut NATIONALLICENCE 700 1- Danelon Valérie Institut d'Electronique Fondamentale, Univ. Paris Sud, bât. 220, 91405, Orsay, France aut NATIONALLICENCE 700 1- Chaubet Michel CNES, 18 Avenue, E. Belin, 31055, Toulouse Cedex, France aut NATIONALLICENCE 700 1- Febvre Pascal DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut NATIONALLICENCE 700 1- Beaudin Gérard DEMIRM, Observatoire de Paris, 61, Av. de l'Observatoire, 75014, Paris, France aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/1(1997-01-01), 85-99 0195-9271 18:1<85 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer