Title :
Investigation of a calibration concept for optimum performance of adaptive antenna systems
Author :
Passmann, Christian ; Hickel, Frank ; Wixforth, Thomas
Author_Institution :
Adv. Dev. Commun., Robert Bosch GmbH, Hildesheim, Germany
Abstract :
A calibration concept for an adaptive antenna system has been developed. It consists of two steps: (1) an off-line calibration of passive components after manufacture; and (2) an on-line calibration of active components during operation. Off-line calibration measurements have been performed and analyzed using an array antenna for the 1.71-1.785 GHz frequency range, which is equipped with calibration ports for precise phase and amplitude calibration of the element coefficients. The influence of calibration-inaccuracies, mutual coupling effects, and nonideal beam-patterns are critically discussed
Keywords :
UHF devices; adaptive antenna arrays; antenna radiation patterns; antenna testing; calibration; measurement errors; 1.71 to 1.785 GHz; SDMA; UHF; active components; adaptive antenna systems; amplitude calibration; array antenna; calibration ports; calibration-inaccuracies; cellular mobile communication systems; element coefficients; frequency range; mutual coupling effects; nonideal beam-patterns; off-line calibration measurements; on-line calibration; optimum performance; passive components; phase calibration; space division multiple access; Adaptive arrays; Adaptive systems; Antenna measurements; Calibration; Frequency measurement; Manufacturing; Performance analysis; Performance evaluation; Phase measurement; Phased arrays;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686640
