Agile and adaptive wideband MIMO antenna isolation

A mobile communication device, comprising:

• a transmitter or receiver path comprising:
• a first antenna port connected to two or more wideband antennas, configured to transmit or receive a first data stream, by way of a first adjustment network comprising circuit elements configured to introduce a phase shift or amplitude shift into the first data stream;
• a second antenna port connected to a wideband antenna configured to transmit or receive a second data stream;
• a MIMO channel determination unit configured to determine data corresponding to a leakage between the first antenna port and the second antenna port;
• and
• a beamforming element configured to receive the data from the MIMO channel determination unit and based thereupon to adjust the values of the circuit elements within the first adjustment network, so as to enable a beamforming functionality that reduces leakage of the first data stream to the second antenna port.

A method for reducing leakage between antenna ports of a MIMO wideband antenna array, comprising:

• providing a MIMO transceiver having first antenna port configured to convey a first data stream between a signal processor and a plurality of wideband antennas within an antenna array and a second antenna port configured to convey a second data stream between a signal processor and a wideband antenna within the antenna array;
• determining a leakage of the first data stream into the second antenna port;
• and
• operating the plurality of wideband antennas in a manner that reduces the leakage by attenuating an amplitude of a wirelessly transmitted first data stream in the direction of the wideband antenna.