A method for radio communication by a radio communication apparatus including N antennas, the method comprising: generating, by a radio communication unit, a configuration instruction and a tuning instruction, and transmitting, by the radio communication unit, the configuration instruction to a switching unit and the tuning instruction to a tuning control unit; selecting, by the switching unit comprising N input ports and n output ports, n antennas among the N antennas based on the configuration instruction, and providing a path between an output port of the n output ports and an input port of the N input ports, the input port being coupled to antennas of the selected n antennas, where N is an integer greater than or equal to 3, each of the N antennas to be operated at a frequency in a frequency band, n being an integer greater than or equal to 2 and less than or equal to N - 1, each of the N input ports being coupled to one of the N antennas; and coupling, by an antenna tuning apparatus comprising n antenna ports, m radio ports and p adjustable impedance devices, the n output ports to the n antenna ports such that each of the n output ports is coupled, to one of the n antenna ports of the antenna tuning apparatus, where m is an integer greater than or equal to 2 and where p is an integer greater than or equal to 2m, each of the p adjustable impedance devices has a reactance being adjustable based on the tuning instruction received from the tuning control unit, each of the m radio ports being coupled to the radio communication unit, and the tuning instruction being a function of the configuration instruction and of one or more variables or quantities including information on efficiency of one or more of the N antennas, information on isolation between the N antennas, one or more operational factors of the radio communication apparatus, and/or one or more performance metrics of the radio communication apparatus, wherein the configuration instruction and the tuning instruction are such that, at a frequency of operation of the radio communication apparatus, the impedance matrix presented by the radio ports is close to a specified matrix. generating, by a radio communication unit, a configuration instruction and a tuning instruction, and transmitting, by the radio communication unit, the configuration instruction to a switching unit and the tuning instruction to a tuning control unit; selecting, by the switching unit comprising N input ports and n output ports, n antennas among the N antennas based on the configuration instruction, and providing a path between an output port of the n output ports and an input port of the N input ports, the input port being coupled to antennas of the selected n antennas, where N is an integer greater than or equal to 3, each of the N antennas to be operated at a frequency in a frequency band, n being an integer greater than or equal to 2 and less than or equal to N - 1, each of the N input ports being coupled to one of the N antennas; and coupling, by an antenna tuning apparatus comprising n antenna ports, m radio ports and p adjustable impedance devices, the n output ports to the n antenna ports such that each of the n output ports is coupled, to one of the n antenna ports of the antenna tuning apparatus, where m is an integer greater than or equal to 2 and where p is an integer greater than or equal to 2m, each of the p adjustable impedance devices has a reactance being adjustable based on the tuning instruction received from the tuning control unit, each of the m radio ports being coupled to the radio communication unit, and the tuning instruction being a function of the configuration instruction and of one or more variables or quantities including information on efficiency of one or more of the N antennas, information on isolation between the N antennas, one or more operational factors of the radio communication apparatus, and/or one or more performance metrics of the radio communication apparatus, wherein the configuration instruction and the tuning instruction are such that, at a frequency of operation of the radio communication apparatus, the impedance matrix presented by the radio ports is close to a specified matrix.