Title :
Efficiencies and System Temperature for a Beamforming Array
Author :
Warnick, Karl F. ; Jeffs, Brian D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT
fDate :
6/30/1905 12:00:00 AM
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.
Keywords :
antenna feeds; antenna phased arrays; antenna radiation patterns; active beamforming array; amplifier noise; aperture efficiency; mutual coupling; noise matching efficiency; phased array feed; radiation efficiency; spillover efficiency; system temperature; Amplifier noise; antenna array feeds; antenna arrays; antenna efficiency;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2008.2001752