Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Reexamination Certificate
2005-06-21
2005-06-21
Choe, Henry (Department: 2817)
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
C330S295000
Reexamination Certificate
active
06909324
ABSTRACT:
A high-efficiency solid state power amplifier (SSPA) for specific use in a spacecraft is provided. The SSPA has a mass of less than 850 g and includes two different X-band power amplifier sections, i.e., a lumped power amplifier with a single 11-W output and a distributed power amplifier with eight 2.75-W outputs. These two amplifier sections provide output power that is scalable from 11 to 15 watts without major design changes. Five different hybrid microcircuits, including high-efficiency Heterostructure Field Effect Transistor (HFET) amplifiers and Monolithic Microwave Integrated Circuit (MMIC) phase shifters have been developed for use within the SSPA. A highly efficient packaging approach enables the integration of a large number of hybrid circuits into the SSPA.
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PCT International Search Report, PCT/US 01/47831, dated Dec. 21, 2001.
Cheng Sheng
Wallis Robert E.
Choe Henry
Fasulo, II Albert J.
The Johns Hopkins University
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