Calibration for antenna elements of a multi-antenna structure

An apparatus for a communication device comprising a plurality of antenna elements arranged in an antenna array structure and configured to perform dynamic calibration of the antenna elements for beamforming, the apparatus comprising controlling circuitry configured to cause:

• during an antenna calibration opportunity, performance of interference level measurements and antenna calibration measurements;
• and
• adaptation of the antenna calibration measurements for one or more of the antenna elements based on the measured interference level, wherein adapting the antenna calibration measurements for one or more of the antenna elements based on the measured interference level comprises determining a weighting value for the antenna calibration measurements for each antenna calibration opportunity based on the corresponding measured interference levels.