Array antenna receiving apparatus and method for calibrating the same

An array antenna receiving apparatus having an array antenna (101) including a plurality of antenna elements (102) for forming a receiving-oriented pattern, radio receiving portions (104) corresponding to the antenna elements, calibration signal supplying portions (103, 106-108) for supplying calibration signals having predetermined symbol patterns to the radio receiving portions, a calibration signal extracting portion (110) for extracting the calibration signals having passed through the radio receiving portions, and a calibration signal processing portion (109) for selecting predetermined one of the radio receiving portions as a reference branch and for creating correction information for correcting the receiving-oriented patterns by using at least one of the phase differences and amplitude ratios between the calibration signals having passed through the radio receiving portion and a calibration signal having passed through the reference branch,

• wherein a receiving quality detecting portion (111) is further provided for determining the radio receiving portion having the best receiving quality from the calibration signals having passed through the radio receiving portion and for selecting the radio receiving portion as a reference branch, and the calibration signal processing portion receives information on the radio receiving portion to be the reference branch from the receiving quality detecting portion and creates correction information for correcting the receiving-oriented pattern by using at least one of the phase differences and amplitude ratios between the calibration signal having passed through the radio receiving portion that is the reference branch and the calibration signals having passed through the other radio receiving portions.