Abstract:
A method is provided which includes: defining at least one radiofrequency performance objective to be produced on a selected coverage area on the ground; producing a rigid shell having a predefined profile; producing a reflecting flexible membrane; determining, by successive iterations, N optimum local deformations to be applied at N different points of the flexible membrane; producing N rigid supporting bars of different lengths corresponding to the optimum local deformations to be applied to the flexible membrane; and positioning and rigidly fixing the flexible membrane onto the rigid shell via the N supporting bars.
Abstract:
A multi-beam antenna comprises an array of feeds illuminating a reflector, the feeds being associated in a plurality of groups. Each feed comprises a polarizer, two diplexers and four ports operating in four different colours. All the feeds belonging to the same group comprise first ports having the same first colour, or second ports having the same second colour, linked together to form a first beam and third ports having the same third colour, or fourth ports having the same fourth colour, linked together to form a second beam.
Abstract:
A satellite (SAT) includes a platform, at least one solar panel for supplying the satellite (SAT) with electrical energy, the solar panel being fixed along one side of the platform, the satellite comprising an antenna system (Rx+Z, Rx-Z, Tx+Z, Tx-Z) comprising two remote control antennas (Rx+Z, Rx-Z) and two remote measurement antennas (Tx+Z, Tx-Z), wherein the two remote control antennas (Rx+Z, Rx-Z) are disposed back to back on either side of the platform, and spaced one from the other by a distance less than or equal to λ, where λ corresponds to the wavelength of the remote control or remote measurement signal, the two remote measurement antennas (Tx+Z, Tx-Z) are disposed back to back, on either side of the platform, and spaced one from the other by a distance less than or equal to λ, the antenna system is disposed at one of the two ends of the side of the platform (PF) on which the solar panel (PS) is fixed.
Abstract:
The transmitting and receiving antenna comprises an array of feeds clustered by groups of four adjacent feeds along two directions X, Y of a plane, each feed comprising two transmitting ports and two receiving ports with orthogonal polarizations. For each group of four adjacent feeds, the first, or the second, transmitting ports, respectively the first, or the second, receiving ports, corresponding to a same pair of frequency and polarization values are connected two-by-two in the direction X then two-by-two in the direction Y, the four interconnected transmitting ports forming a transmitting beam and the four interconnected receiving ports forming a receiving beam.