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4 January 1994 Thirty-five-GHz downconverter using high-temperature superconductor films
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A receiver with an rf band of 34.6 GHz to 35.4 GHz, an integral local oscillator with a frequency of 36.5 GHz, and an IF frequency of 1.1 GHz to 1.9 GHz was designed and fabricated. The rf filter was a three pole distributed design fabricated with High Temperature Superconductor (HTS) films. The IF filter was a 9 pole lumped element design fabricated with HTS films. The local oscillator was a parallel feedback type design using a sapphire resonator shielded by two HTS ground planes. The rest of the elements used normal conductors or semiconductors operated at 77 K. The entire subassembly was integrated into a liquid nitrogen dewar and its performance is reported in the text, with the important figures of merit being low noise figure and low phase noise.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roger J. Forse and Steve Rohlfing "Thirty-five-GHz downconverter using high-temperature superconductor films", Proc. SPIE 2156, High Tc Microwave Superconductors and Applications, (4 January 1994);

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