The design, fabrication, and testing of hybrid semiconductive/high-temperature superconductive (HTSC) Ku-band microwave integrated circuits (MICs) operating at cryogenic temperatures are described. The first cooled feedback oscillators using GaAs FET monolithic microwave integrated circuit (MMIC) low-noise amplifiers for gain and a high-Q TlBaCaCuO linear resonator for stabilization is presented together with a low-noise high electron mobility transistor (HEMT) ampflifier using TlBaCaCuO distributed stubs for matching. Both demonstrate that HTSC and semiconductive elements can be successfully integrated.

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Conference 1992 IEEE MTT-S International Microwave Symposium Digest Part 2 (of 3)
Smuk, J.W., Stubbs, M.G., & Wight, J. S. (1992). Hybrid semiconductive/high temperature superconductive Ku-band oscillator and amplifier MICs. In IEEE MTT-S International Microwave Symposium Digest (pp. 485–488).