The antenna architecture comprises a hybrid beamformer consists of a part, trainers Ny quasi-optical beams stacked, each forming quasi-optical beam having a waveguide parallel plate provided with a radiating aperture linear and including a lens (13) and internal cones provided with bundles of access ports, each forming quasi-optical beams being adapted to form beams in two bands of transmitting and receiving frequencies in a first direction space, and secondly, at least one forming electronic beams comprising a combination device (34) connected to Nx phase control channels and amplitude, each phase control chain and amplitude being connected to a respective beam access port of each trainer quasi-optical beams, the forming of electronic beams being adapted to form beams in a second direction space orthogonal to the first direction.
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