Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Patent
1991-12-20
1993-04-27
Mottola, Steven
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
330295, H03F 368
Patent
active
052066045
ABSTRACT:
A broadband high power amplifier for multifrequency signal applications comprises an N-way power combiner that is arranged to combine a plurality of multi-frequency input signals and provide a combined (complex) signal at its output. The output of the N-way combiner is amplified in a preamplifier stage and supplied therefrom to an M-way power divider. The M-way power divider has a plurality of M output ports from which M subdivided versions of the combined (complex) output signal from the preamplifier are derived. Each of these effectively identical subdivided signals is coupled to a respective one of a plurality of M signal amplifier stages that drive the radial power combiner. Each amplifier stage is a relatively low to moderate gain amplifier stage, so that its amplitude and phase characteristics may be matched with those of the others of the M amplifier stages. Since the phase and amplitude characteristics of the amplifier stages that drive the radial power combiner are matched with one another, the M stage driver is effectively self-isolating, making it unnecessary to use band-limiting isolator components to protect the outputs of the respective driver amplifier stages feeding the radial power combiner.
REFERENCES:
patent: 4375622 (1983-03-01), Hollingsworth et al.
patent: 4647869 (1987-03-01), Kaneko et al.
patent: 4688259 (1987-08-01), Edridge
patent: 4724400 (1988-02-01), Luettgenau
patent: 4931747 (1990-06-01), Hom
patent: 4970479 (1990-11-01), Landt et al.
patent: 5032804 (1991-07-01), Hollingsworth
Harris Corporation
Mottola Steven
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