Patent ID: 8140020

Claim:
An RF (Radio Frequency) path calibration apparatus for a multi-antenna mobile communication system, the apparatus comprising: an RF transmission path calibrating means for generating a transmission reference signal, adding the generated transmission reference signal and a second IF transmission signal passed through an RF transmission path to measure an analog power value, converting the measured analog power value into a first digital value, and then controlling the phase value of a phase converter and the gain of a variable amplifier on the transmission path by using the first digital value so that the analog power value has the minimum value; and an RF reception path calibrating means for generating a reception reference signal, adding the generated reception reference signal and the first IF transmission signal to measure an analog power value, converting the measured analog power value into a second digital value, and then controlling the phase value of a phase converter and the gain of a variable amplifier on the reception path by using the second digital value so that the analog power value has the minimum value.