DocumentCode
2123158
Title
A Superconducting Compact C-Band Low Noise Front End With an Integral Cooler
Author
Madjar, Asher ; Biran, Avi ; Breitbard, Avi ; Philosof, Avinoas
Author_Institution
RAFAEL, Haifa, Israel., P.O.Box 2250(code 87), Haifa, Israel. Tel.: +972-4-794128, fax +972-4-792037, E-mail: asher@ee.technion.ac.il
Volume
2
fYear
1994
fDate
5-9 Sept. 1994
Firstpage
1512
Lastpage
1517
Abstract
We report a superconducting RF front-end operating in C-band, which includes a narrow band filter (pre-selector) and an amplifier on a 10×10×0.5 mm3 MgO substrate. The amplifier is a hybrid structure incorporating two Fujitsu HEMTs, and exhibits gain of 23db and 26db and minimum noise figure of 0.9db and 0.25db at room temperature and at 77 degrees Kelvin, respectively. The filter is a 3 section end-coupled microstrip design made of YBCO film on MgO substrate and exhibits less than 0.5 db insertion loss at 77 degrees K. The device is incorporated in a cryogenic mini-dewar designed for operation at microwave frequencies and cooled by a closed cycle refrigerator.
Keywords
HEMTs; MODFETs; Narrowband; Noise figure; Radio frequency; Radiofrequency amplifiers; Substrates; Superconducting device noise; Superconducting filters; Superconducting microwave devices;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 1994. 24th European
Conference_Location
Cannes, France
Type
conf
DOI
10.1109/EUMA.1994.337431
Filename
4138477
Link To Document