Radio frequency power amplifier for lossless power combining

Details Radio frequency power amplifier for lossless power combining Radio frequency power amplifier for lossless power combining

2007-01-09

2007-01-09

Nguyen, Patricia (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

C330S053000, C330S295000, C330S286000

Reexamination Certificate

active

11011988

ABSTRACT:
An amplifier device (40) includes at least one amplifier (42) having an output. A plurality of conductors (48, 50, 52) are coupled to the output in parallel with each other. The plurality of conductors (48, 50, 52) each has an electrical length that corresponds to a quarter wavelength of a signal amplified by the amplifier. The electrical length of the conductors (48, 50, 52) allows for any one of them to be selectively shorted so that the shorted conductor appears as an open circuit relative to the output of the amplifier (42) and has no effect on the operation of the amplifier device under such circumstances. The disclosed amplifier configuration allows for daisy chain connections for stacking amplifiers to increase amplification in an effectively lossless manner.

REFERENCES:
patent: 4772856 (1988-09-01), Nojima et al.
patent: 4780685 (1988-10-01), Ferguson
patent: 4965530 (1990-10-01), Katz
patent: 5105167 (1992-04-01), Peczalski
patent: 5274341 (1993-12-01), Sekine et al.
patent: 6836183 (2004-12-01), Wight

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