An optical antenna for a duplex link formed by a transmit, Tx, beam towards a partner optical antenna and a receive, Rx, beam from the partner antenna, the optical antenna comprising: a proximal optical path including a bidirectional waveguide for a duplex propagation of the duplex link from at least one Tx source of the Tx beam and towards at least one receiver of the Rx beam; a distal duplex optical path (40") for a duplex propagation of the duplex link from and towards the partner optical antenna; a beam shaper positioned in the distal optical path (40") to shape Z a duplex propagation pattern (50, 51, 51', 510, 512) of the duplex link; and a controller to control the beam shaper to adaptively shape the duplex propagation pattern (50, 51, 51', 510, 512) to enclose: a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam; and a second antenna position of the partner antenna at the instant of reception of the Tx beam, characterized in that the controller is further configured to control the beam shaper to adaptively shape the duplex propagation pattern (50, 51, 51', 510, 512) between: a first pattern; and a second pattern different from the first pattern, wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern (50, 51, 51', 510, 512) from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna. a proximal optical path including a bidirectional waveguide for a duplex propagation of the duplex link from at least one Tx source of the Tx beam and towards at least one receiver of the Rx beam; a distal duplex optical path (40") for a duplex propagation of the duplex link from and towards the partner optical antenna; a beam shaper positioned in the distal optical path (40") to shape Z a duplex propagation pattern (50, 51, 51', 510, 512) of the duplex link; and a controller to control the beam shaper to adaptively shape the duplex propagation pattern (50, 51, 51', 510, 512) to enclose: a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam; and a second antenna position of the partner antenna at the instant of reception of the Tx beam, a first partner antenna position of the partner antenna at the instant of transmission of the Rx beam; and a second antenna position of the partner antenna at the instant of reception of the Tx beam, characterized in that the controller is further configured to control the beam shaper to adaptively shape the duplex propagation pattern (50, 51, 51', 510, 512) between: a first pattern; and a second pattern different from the first pattern, wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern (50, 51, 51', 510, 512) from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna. a first pattern; and a second pattern different from the first pattern, wherein the controller is further configured to control the beam shaper to modify the duplex propagation pattern (50, 51, 51', 510, 512) from the first pattern to the second pattern and/or vice versa on the basis of criteria on status of the optical antenna and/or the partner optical antenna.