Title :
An integrated 11 GHz 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. ; Smith, P.A. ; Alford, N.M. ; Peters, N. ; Grier, J.
Author_Institution :
GEC Hirst Res. Centre, Borehamwood, UK
fDate :
6/1/1995 12:00:00 AM
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 60 K. Details of the system integration are presented, together with microwave and thermal test results.<>
Keywords :
HEMT circuits; cryogenic electronics; high-temperature superconductors; microstrip filters; microwave frequency convertors; microwave mixers; microwave receivers; packaging; superconducting cavity resonators; superconducting microwave devices; 1 GHz; 11 GHz; GaAs; GaAs HEMT; GdBaCuO; HTS cavity stabilisation; HTS microstrip input filter; IF signals; Si diode mixer; X-band signals; YBaCuO; closed cycle Stirling cryocooler; cryogenic unit; frequency selective receiver; high temperature superconductor; integrated SHF cryogenic downconverter; local oscillator; semiconductor components; superconducting components; Bandwidth; Cryogenics; Frequency conversion; High temperature superconductors; Microstrip filters; Microwave filters; Semiconductivity; Silicon; Superconducting filters; Superconducting microwave devices;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
