The CloudSat spacecraft, scheduled for launch in 2004, will carry the 94 GHz Cloud Profiling Radar (CPR) instrument. The design, assembly and test of the flight radio frequency electronics subsystem (RFES) for this instrument has been completed and is presented here. The RFES consists of an upconverter (which includes an exciter and two drive amplifiers), a receiver, and a transmitter calibrator assembly. Some key performance parameters of the RFES are as follows: dual 100 mW pulse-modulated drive outputs of 94 GHz, overall receiver noise figure below 5.0 dB, a highly stable W-band noise source to provide knowledge accuracy of receiver gain of less than 0.4 dB over the 2 year mission life, and a W-band peak power detector to monitor the transmitter output power to within 0.5 dB over life. Some recent monolithic microwave integrated circuit (MMIC) designs were utilized which implement the drive amplifiers in 100 nm GaAs HEMT technology and receiver low-noise amplifier in 100 nm InP HEMT technology.
A 94 GHz RF electronics subsystem for the CloudSat cloud profiling radar
2003
4 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Konferenz)
Englisch
Eichen (Abgleichen) , Galliumarsenid , HEMT (High Electron Mobility Transistor) , Indiumphosphid , integrierte Mikrowellenschaltung , Kalibrieren (Abgleichen) , Mikrowellenverstärker , Millimeterwelle , Radar , Rauschquelle , Rauschunterdrückung , Satellit , Schaltungsentwurf , W-Band , Wolframzusatz
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