OPERATION OF SUPERCONDUCTING DIGITAL RECEIVER CIRCUITS ON 2-STAGE GIFFORD-MCMAHON CRYOCOOLER
Robert J. Webber, Vladimir Valentinovich Dotsenko, Andrei Talalaevskii +23 more
We have demonstrated the full operation of digital RF receivers on a HYPRES-designed cryostat, which couples an Nb-based superconducting Rapid Single Flux Quantum (RSFQ) chip to a commercially available 100 mW 4 Kelvin Gifford-McMahon cryocooler. A field demonstration of digitization of a satellite-received signal at 7.7 GHz is described. The digital receiver chip is a 1 cm×1 cm chip comprising ∼11,000 Josephson junctions (JJ). The measured cryogenic thermal and magnetic environments of the chip are discussed and their impact on performance. Reception and direct digital conversion of real signals in the HF-, VHF-, and X-bands including signals from military satellite antennae shows the potential of this system to replace large and power-hungry multiple analog receivers.
AIP conference proceedings•Jan 1, 2008•10 citations