Patent ID: 7209078

Claim:
A smart antenna calibration system comprising: an antenna array having a plurality of antennas, each antenna having a calibration coupler for providing a monitoring signal indicative of a signal passing through a transceiver associated thereof; and a processing unit including at least one signal splitter that splits at least one of the monitoring signals and a combiner array comprising one or more combiners for combining at least two of the split monitoring signals from a first and a second antennas to produce a first combined signal representing an in-phase sum and a second combined signal representing a quadrature sum thereof; and a power detector in communication with the processing unit, wherein the power detector and the processing unit are configured to detect a power of the signal passing each of the first and second antennas and the in-phase power and quadrature power from the first and second combined signals for determining a phase difference of the monitoring signals between the two antennas.