Title :
An Integrated 11GHz Cryogenic Downconverter
Author :
Phillips, W.A. ; Jedamzik, D. ; Lamacraft, K. ; Zammattio, S. ; Greed, R.B. ; Hedges, S.J. ; Whitehead, P.R. ; Nicholson, B.F. ; Button, T.W. ; Alford, N.McN. ; Peters, N. ; Grier, J.
Author_Institution :
GEC Hirst Research Centre, Borehamwood WD6 1RX
Abstract :
A cryogenic downconverter has been designed and built to demonstrate the integration of semiconducting and superconducting components in a complete subsystem cooled by a closed cycle Stirling cryocooler. The frequency selective receiver converts 11 GHz (X-band) signals to an IF of 1000 MHz using a high temperature superconducting (HTS) microstrip input filter with a 1% bandwidth, a silicon diode mixer and a local oscillator stabilized by means of a 10 GHz HTS cavity and driven by a GaAs HEMT. The components are packaged into a cryogenic unit cooled to 60K Details of the system integration are presented, together with microwave and thermal test results.
Keywords :
Bandwidth; Cryogenics; Frequency conversion; High temperature superconductors; Microstrip filters; Microwave filters; Semiconductivity; Silicon; Superconducting filters; Superconducting microwave devices;
Conference_Titel :
Microwave Conference, 1994. 24th European
Conference_Location :
Cannes, France
DOI :
10.1109/EUMA.1994.337285
