High-efficiency solid state power amplifier

Amplifiers – With plural amplifier channels – Redundant amplifier circuits

Reexamination Certificate

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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.

REFERENCES:
patent: 5008633 (1991-04-01), Hom
patent: 5206604 (1993-04-01), Vaninetti
patent: 5561397 (1996-10-01), Kumar et al.
patent: 5793253 (1998-08-01), Kumar et al.
patent: 6133790 (2000-10-01), Zhou
patent: 6297696 (2001-10-01), Abdollahian et al.
patent: 6359504 (2002-03-01), Cozzarelli
patent: 1 058 380 (2000-12-01), None
Advances in Deep Space Telecommunications Technology at the Applied Physics Laboratory, Fourth IAA Intl. Conf. on Low-Cost Planetary Missions, Mar. 1, 2000, held at APL May 2-5, 2000, by Bokulic et al.
PCT International Search Report, PCT/US 01/47831, dated Dec. 21, 2001.

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