Patent ID: 8396420

Claim:
An active antenna array for a mobile communications network comprising: a plurality of antenna elements for relaying radio signals at the plurality of antenna elements and being connected to a plurality of signal paths; a plurality of signal inputs for inputting the radio signals at a first frequency band and being connected to the plurality of signal paths; at least one first mixer in two or more of the plurality of signal paths for converting the radio signals between the first frequency band and a second frequency band; a single first oscillator being connected to different ones of the at least one first mixer through a first oscillator signal path and supplying first oscillator signals to the at least one first mixer; and at least one first dispersion element connected to at least one of the plurality signal paths, wherein a setting of the at least one first dispersion element is dependent on at least one of a delay of the radio signals traversing the active antenna array or a length of the first oscillator signal path, wherein the at least one first dispersion element is connected in the first oscillator signal path between the single first oscillator and the at least one first mixer.