Additive noise of combined amplifiers

Analytical predictions of additive noise in combined amplifiers and their experimental verification are presented. The analysis addresses both random and deterministic noise processes, and in each case the signal-to-noise ratio of combined amplifiers is compared to that of an individual amplifier inside the combiner. The signal-to-noise ratio of combined amplifiers improves for uncorrelated random noise, but remains unchanged for all other types, including noise figure.<
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