Phased array antenna

A phased array antenna, comprising:

• several antenna elements;
• a signal feed entry from which a signal is transmitted to or to which a signal is transmitted from the several antenna elements;
• and
• for each antenna element a corresponding phase shifting device,
• wherein a phase difference of each signal that is transmitted from the signal feed entry to the respective antenna element or that is transmitted from the respective antenna element to the signal feed entry is modified by the corresponding phase shifting device in order to adjust a superposition of each signal according to a preferred direction of radiation of the phased array antenna,
• wherein a bias voltage is applied to each phase shifting device via two bias voltage electrode lines that are connected to a bias voltage driver,
• wherein the bias voltage driver comprises several output channel terminal pairs,
• wherein each output channel terminal pair comprises two output channel terminals,
• wherein the bias voltage driver is able to apply a tunable output channel voltage difference to each terminal pair, and
• wherein the two bias voltage electrode lines of each phase shifting device are connected to a respective terminal pair.