Patent ID: 6806844
Filing Date: 2004-10-19
Classification: H01Q,H04B

Abstract:
A calibration system of an array antenna receiving apparatus, for inputting a multiplexing signal which is obtained by multiplexing a well-known calibration signal to signals received from antenna devices forming an array antenna corresponding to the antenna devices, for detecting phase/amplitude information of the calibration signal every antenna radio receiving unit connected to each antenna device, based on the calibration signal extracted from the multiplexing signals, and for correcting a user signal to a mobile machine which is received every antenna radio receiving unit connected to each antenna device based on the phase/amplitude information, said calibration system comprising:radio control means for detecting a detection voltage of the total reception power of the inputted multiplexing signal and for gain controlling the received multiplexing signal in accordance with the detection voltage and for outputting the controlled signal as a signal for extracting the calibration signal; and signal processing means for receiving the detection voltage of the total reception power from said control means, for determining an adaptive calibration time every antenna device based on the detection voltage, and for detecting and outputting the phase/amplitude information of the calibration signal from the multiplexing signal based on the longest calibration time among the calibration times.