Abstract

A YBa/sub 2/Cu/sub 3/O/sub 7- delta / (YBCO) step-edge microbridge JJ (Josephson junction), two 12-GHz YBCO microstrip bandpass filters, a 1-GHz YBCO filter, and current bias and voltage monitor circuits were successfully combined on a 20-mm*20-mm MgO substrate and integrated into a frequency downconverter for receiving DBS (direct broadcast satellite) signals. The YBCO downconverter and the GaAs low-noise IF (intermediate frequency) amplifier were combined in a microwave cryostat. The dependence of mixing signals on temperature and LO (local oscillator) input power was measured. The conversion gain and the noise figure corresponding to the YBCO downconverter package were -14.5 dB and 12.2 dB, respectively, at 15 K and low LO power (-25 dBm). The first demonstration of the HTS (high-temperature superconductive) subsystem, i.e. the monolithic YBCO downconverter, shows potential for applications in mobile radio communications and satellite broadcasting. >

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.