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Antenna array calibration algorithms

: Kortke, A.; Monich, G.

Verband der Elektrotechnik, Elektronik, Informationstechnik -VDE-:
MICRO.tec 2000. VDE World Microtechnologies Congress: Applications - Trends - Visions. Proceedings. Vol.2
Berlin: VDE-Verlag, 2000
ISBN: 3-8007-2579-7
World Microtechnologies Congress (MICROTEC) <2000, Hannover>
Fraunhofer HHI ()
adaptive antenna arrays; antenna arrays; antenna radiation patterns; array signal processing; calibration; errors; microstrip antenna arrays; mobile radio; uhf antennas; antenna array calibration algorithms; array signal processing methods; calibration errors; null steering beamforming techniques; mobile communications systems; accuracy limitations; extended calibration model; calibration parameters; antenna measurements; smart antennas

For various array signal processing methods, a well calibrated antenna array is necessary to achieve a high gain from their application. Consequences of calibration errors on null steering beamforming techniques are given here. In the past, array calibration algorithms for mobile communications systems have been proposed, which make use of waves from surrounding base stations. Some aspects of accuracy limitations of this approach are treated in this paper. Further, an extended calibration model for microstrip antenna arrays is presented which allows a more accurate calibration. An algorithm to determine the required calibration parameters from antenna measurements is given.