Amplifier noise, antenna array mutual coupling, multiport circuits, signal-to-noise ratio
From classical two-port noise theory, the noise figure of an amplifier is minimized when a source is matched to a particular optimal reflection coefficient at the amplifier input. In this paper, we show that this result extends in a natural way to the multiport case, with a coupled N-port source network such as an array antenna connected by a multiport matching network to the inputs of N low-noise amplifiers. For optimal noise performance, the matching network must decouple the array and present isolated, individually noise-matched ports to the amplifier inputs.
Original Publication Citation
Warnick, K. F., and M. A. Jensen. "Optimal Noise Matching for Mutually Coupled Arrays." Antennas and Propagation, IEEE Transactions on 55.6 (27): 1726-31
BYU ScholarsArchive Citation
Jensen, Michael A. and Warnick, Karl F., "Optimal noise matching for mutually-coupled arrays" (2007). All Faculty Publications. 252.
Ira A. Fulton College of Engineering and Technology
Electrical and Computer Engineering
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