High T/sub c/ superconductor and III-V solid state microwave hybrid circuits
| Autor: | Charles F. Carter, Philip Pang, Zhi-Yuan Shen, William L. Holstein, Daniel B. Laubacher, Charles Wilker, M. Adlerstein |
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| Rok vydání: | 1993 |
| Předmět: |
Materials science
business.industry Amplifier Heterojunction bipolar transistor Transistor High-electron-mobility transistor Condensed Matter Physics Microstrip Electronic Optical and Magnetic Materials law.invention Resonator law Phase noise Optoelectronics Electrical and Electronic Engineering business Microwave |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 3:2832-2835 |
| ISSN: | 1558-2515 1051-8223 |
| DOI: | 10.1109/77.233492 |
| Popis: | Several high-temperature superconductor (HTS)/III-V solid-state hybrid microwave circuits were designed, fabricated, and tested. The I-V curves, S-parameters, and noise behavior for several solid-state devices at cryogenic temperatures were measured. Several high-electron-mobility transistor (HEMT) and heterojunction bipolar transistor (HBT) C-band low-noise amplifiers were fabricated and tested at cryogenic temperatures with an additional gain of 3 dB when compared to their room-temperature gain. These amplifiers were also used in low-phase-noise oscillators stabilized by a HTS lambda /2 microstrip line resonator with a loaded Q-value of 3*10/sup 3/ or a sapphire-HTS resonator with a loaded Q-value of 1.2*10/sup 6/, both measured at 80 K. Preliminary measurement at 70 K indicates that the phase noise of an oscillator stabilized with a sapphire-HTS resonator was below -125 dBc/Hz at 10-kHz offset and limited by the test setup. > |
| Databáze: | OpenAIRE |
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