Importance

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Abstract

An error calibrating apparatus of an array antenna system according to an exemplary embodiment of the present invention is an error calibrating apparatus of an array transmitting antenna system having a plurality of array antennas and includes a calibrating signal generator which generates an error calibrating signal as a single frequency signal, in an area which does not interfere with a passband of a transmitted signal; an array RF transmitter which upwardly converts the transmitted signal into an RF band to transmit the signal to the plurality of array antennas; an error calibration estimator which correlates the error calibrating signal and the receiving single frequency signal received by passing through the array RF transmitter to estimate a transfer function of the array RF transmitter and extract a filter coefficient using the estimated transfer function; and a complex filter which calibrates an error of the transmitted signal by applying the filter coefficient to output the corrected transmitted signal to the array RF transmitter.

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First Claim