Low-noise hybrid superconductor/semiconductor 7.4-GHz receiver downconverter for NASA space applications
| Autor: | Marc C. Foote, R. F. Leonard, Kul B. Bhasin, Brian D. Hunt, Richard P. Vasquez, Javier J. Bautista, Robert R. Romanofsky, B. H. Fujiwara, Hamid Javadi, Wilbert Chew, Jeff B. Barner, A. J. Guern, C.M. Chorey, Gerry G. Ortiz, Paul D. Wamhof, Daniel L. Rascoe, J. G. Bowen |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Noise temperature
Materials science Physics::Instrumentation and Detectors business.industry Amplifier Astrophysics::Instrumentation and Methods for Astrophysics Refrigerator car Electrical engineering Port (circuit theory) Cryogenics Resonator Condensed Matter::Superconductivity Optoelectronics business Microwave Diode |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| Popis: | A low-noise microwave receiver downconverter utilizing thin-film high-critical-temperature superconducting (HTS) passive circuitry and semiconductor active devices has been developed for use in space. It consists of an HTS pre-select filter, a cryogenic low-noise amplifier, a cryogenic mixer, and a cryogenic oscillator with an HTS resonator. The downconverter converts a 200 MHz wide band centered around 7.35 GHz to a band centered around 1.0 GHz. When cooled to 77 K, the downconverter plus cables inside a cryogenic refrigerator produced a noise temperature measured at the refrigerator port of approximately 50 K with conversion gain of 18 dB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|