Abstract: A wireless communication unit includes an antenna arrangement; an aperture tuner operably coupled to a first port of the antenna arrangement; a measurement circuit operably coupled to an antenna input feed point of the antenna arrangement and arranged to measure a parameter. A controller, operably coupled to the aperture tuner, is arranged to perform closed loop aperture tuning using the measured parameter.

Abstract: A wireless communication unit is described that includes a transceiver; at least one antenna port operably coupled to the transceiver via at least one antenna switch; a radio frequency part of the transceiver that includes at least one tuneable radio frequency (RF) component; and a test signal generator for generating an RF test signal for receiver calibration. The radio frequency part includes a coupler located between the at least one tuneable RF component and the at least one antenna switch for coupling the RF test signal to or from the radio frequency part for calibration.

Abstract: A wireless communication unit includes at least one antenna port; a transmitter and a receiver operably coupled to the at least one antenna port via a duplexer; wherein the duplexer includes a dynamically reconfigurable phase shift network that includes: at least one tunable radio frequency (RF) component; and at least one switch operably coupled to the tunable RF component and controllable to reconfigure the dynamically reconfigurable phase shift network to selectively support both normal and reverse duplexer modes of operation for RF signals passing there through.

Abstract: A wireless communication unit includes an antenna arrangement; an aperture tuner operably coupled to a first port of the antenna arrangement; a measurement circuit operably coupled to an antenna input feed point of the antenna arrangement and arranged to measure a parameter. A controller, operably coupled to the aperture tuner, is arranged to perform closed loop aperture tuning using the measured parameter.

Abstract: A wireless communication unit includes at least one antenna port; a transmitter and a receiver operably coupled to the at least one antenna port via a duplexer; wherein the duplexer includes a dynamically reconfigurable phase shift network that includes: at least one tunable radio frequency (RF) component; and at least one switch operably coupled to the tunable RF component and controllable to reconfigure the dynamically reconfigurable phase shift network to selectively support both normal and reverse duplexer modes of operation for RF signals passing there through.