DocumentCode :
1924096
Title :
A microwave frequency generation unit for space applications
Author :
Dayaratna, L. ; Ramos, L.G. ; Hirokawa, M.
Author_Institution :
Lockheed Marting Commun. & Power Center, Newtown, PA, USA
Volume :
2
fYear :
2001
fDate :
20-24 May 2001
Firstpage :
949
Abstract :
Spacecraft systems designed to provide communications require the necessity to generate multiple, redundant local oscillator frequencies for various up/down converters in the payload. The design requirements are low noise, low power, small size and mass. They are also required to be SEU hard and total dose tolerant and reliable. The reliability is increased by having a design with built in redundancy. The FGU is powered from the spacecraft bus with dedicated EPCs, which are redundant. The FGU is phase locked to a stable reference, which is also redundant. Several test points in the form of telemetry are provided for checking unit functionality and operational characteristics.
Keywords :
circuit reliability; frequency synthesizers; low-power electronics; microwave frequency convertors; microwave generation; microwave oscillators; radiation hardening (electronics); redundancy; space vehicle electronics; SEU hard; built in redundancy; downconverters; low power; microwave frequency generation unit; multiple redundant local oscillator frequencies; noise; operational characteristics; phase locking; reliability; space applications; spacecraft bus; telemetry; total dose tolerant; unit functionality; upconverters; Frequency conversion; Local oscillators; Microwave communication; Microwave frequencies; Microwave generation; Payloads; Power system reliability; Redundancy; Space vehicles; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
ISSN :
0149-645X
Print_ISBN :
0-7803-6538-0
Type :
conf
DOI :
10.1109/MWSYM.2001.967049
Filename :
967049
Link To Document :
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