Patent ID: 8081135

Claim:
Network of antennas for reception of a first and a second frequency bands comprising: a first and a second pairs of square radiating elements arranged in a square area, with geometric centers of the radiating elements at the corner of the square area and sides of each radiating element being parallel to the sides of the square area, the first pair comprising a first radiating element and a second radiating element; and a network of excitation of the radiating elements of the first and second pairs for the reception the first frequency bands comprising: a first hybrid coupler including two inputs and two outputs, of which each of the outputs is connected respectively to each radiating element of the first pair and allowing to generate a phase shift π/2 of between the radiating elements; a second hybrid coupler including two inputs and two outputs, of which each of the outputs is connected respectively to each radiating element of the second pair and allowing to generate a phase shift of π/2 between the radiating elements; a first phase shifter D 1 generating a difference of phase of π/2 between the first inputs of the hybrid couplers; a second phase shifter generating a difference of phase of π/2 between the second inputs of the hybrid couplers; wherein the square radiating elements are turned of π/4 relating to vertical axis in order to free the center of the excitation network allowing a colocalized reception of the second frequency band by a source occupying the center of the said network; and an element of phase shift of π 0 is inserted before the first radiating element, allowing a double circular polarization.