This paper presents the design and performance of a hybrid semiconductor/superconductor amplifier and filter integrated circuit. The circuit combines the high frequency, low noise advantages of a cryogenically cooled GaAs HEMT with the low loss, high Q properties of a narrowband HTSC filter and matching networks. The HTSC filter/amplifier combination produced 7.2dB gain at the passband centre frequency of 19.8 GHz, with a 3dB bandwidth of 2%. A minimum noise figure of 1.5dB was achieved at this frequency.

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Conference 1994 Symposium on Antenna Technology and Applied Electromagnetics, ANTEM 1994
Citation
Drolet, D., Meszaros, S., Smuk, J., Stubbs, M.G., & Wight, J. S. (1994). A high temperature superconductor filter/low-noise amplifier MIC. In Symposium on Antenna Technology and Applied Electromagnetics, ANTEM 1994 - Conference Proceedings (pp. 601–604).