Keywords

system temperature, efficiencies, beamforming array, noise, aperture, spillover, radiation

Abstract

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.

Original Publication Citation

Karl F. Warnick and Brian D. Jeffs. "Efficiencies and System Temperature for a Beamforming Array," IEEE Antennas and Wireless Propagation Letters (Volume:7). 27 January 2008. 565 - 568. doi: 10.1109/LAWP.2008.2001752