Efficiencies and System Temperature for a Beamforming Array

For an active beamforming array, standard definitions for efficiencies and system temperature are not available. We use noise considerations to generalize the single-antenna conventions for aperture efficiency, spillover efficiency, radiation efficiency, and system temperature to arrays. The treatme...

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Published in:IEEE antennas and wireless propagation letters 2008, Vol.7, p.565-568
Main Authors: Warnick, K.F., Jeffs, B.D.
Format: Article
Language:English
Subjects:
Amplifier noise
antenna array feeds
Antenna arrays
antenna efficiency
Antenna feeds
Apertures
Array signal processing
Circuit noise
Mutual coupling
Phased arrays
Receiving antennas
Temperature
Voltage
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description For an active beamforming array, standard definitions for efficiencies and system temperature are not available. We use noise considerations to generalize the single-antenna conventions for aperture efficiency, spillover efficiency, radiation efficiency, and system temperature to arrays. The treatment leads to a new noise matching efficiency that quantifies the effect of mutual coupling on amplifier noise. Numerical results for a phased array feed indicate that the noise increase caused by mutual coupling can be significant.
doi_str_mv 10.1109/LAWP.2008.2001752
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subjects Amplifier noise
antenna array feeds
Antenna arrays
antenna efficiency
Antenna feeds
Apertures
Array signal processing
Circuit noise
Mutual coupling
Phased arrays
Receiving antennas
Temperature
Voltage
title Efficiencies and System Temperature for a Beamforming Array
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