Equipment and method for powering a transceiver tag

A mobile energizer node (4) comprising a transmitter (24) used for transmitting an energizing electromagnetic signal to a transceiver tag (2), the mobile energizer node (4) comprising: an adapter mobility (26) for mounting the energizing mobile node (4) on a mobile device (6); and a beam shaper used to direct a maximum of a directivity pattern of energizing electromagnetic signal at a desired solid angle, wherein the beamformer is used to rotate a direction of maximum directivity pattern with an angular velocity constant or variable.