RF communication devices and techniques

High-frequency communication apparatus comprising: an antenna interface (204) adapted to be coupled to an antenna showing an impedance; a test interface (206) adapted to be coupled to high-frequency test equipment, which shows a test impedance; and a tuning circuit (212) is adapted to, is derived based on a feedback from said test interface (206) to provide a matched impedance selectively either to the impedance or the test impedance; characterized, in that the impedance is time-variable; and the radio frequency communication device includes a test switch (202) which is adapted to switch based on the feedback between a first position and a second position, wherein in the first position, the tuning circuit (212) to the antenna interface (204) is coupled, and wherein in the second position the tuning circuit (212) coupled to the test interface (206).