Abstract: A VHTS or HTS multibeam telecommunications payload includes a first multibeam antenna system with passive antennas, which is configured to receive from and transmit to spots of access stations GW respectively in a first satellite receive Rx band and a first satellite transmit Tx band, and a second multibeam antenna system with passive antennas, which is configured to receive from and transmit to a user coverage zone respectively in a second satellite receive Rx band and a second satellite transmit Tx band, by generating multiple satellite receive user spots and multiple satellite transmit user spots.

Abstract: A VHTS or HTS multibeam telecommunications payload includes a first multibeam antenna system with passive antennas, which is configured to receive from and transmit to spots of access stations GW respectively in a first satellite receive Rx band and a first satellite transmit Tx band, and a second multibeam antenna system with passive antennas, which is configured to receive from and transmit to a user coverage zone respectively in a second satellite receive Rx band and a second satellite transmit Tx band, by generating multiple satellite receive user spots and multiple satellite transmit user spots.

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: The present invention relates to an in-service reconfigurable antenna reflector comprising a rigid support and a membrane, deformable and having radio-electric reflectivity properties. According to the invention, the reflector comprises a plurality of coupling means connecting the rigid support and the membrane, comprising a first link of finger ball joint type connected to the rigid support, and a second link of finger ball joint type connected to the membrane. Each coupling means furthermore comprises a linear actuator, comprising a rotary motor and a screw-nut assembly, connected to the two links of finger ball joint type, and able to generate, in an operational configuration, a translational motion allowing the deformation of the membrane.

Abstract: A multiple-reflector antenna for telecommunications satellites including a shaft, to which are attached at least two sub-reflectors, rotating in relation to a load-bearing structure, and a motor including a rotor able to drive the shaft in rotation, and a stator attached to the load-bearing structure, wherein the multiple-reflector antenna also includes two bearings enabling the shaft to rotate in relation to the load-bearing structure, a torsionally rigid mechanical filter placed between the shaft and the rotor, enabling the rotor to transmit the rotational movement to the shaft, and able to dampen the stresses generated by the shaft on the motor, and locking means able to hold the angular position of the shaft in relation to the load-bearing structure.

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 multiple-reflector antenna for telecommunications satellites including a shaft, to which are attached at least two sub-reflectors, rotating in relation to a load-bearing structure, and a motor including a rotor able to drive the shaft in rotation, and a stator attached to the load-bearing structure, wherein the multiple-reflector antenna also includes two bearings enabling the shaft to rotate in relation to the load-bearing structure, a torsionally rigid mechanical filter placed between the shaft and the rotor, enabling the rotor to transmit the rotational movement to the shaft, and able to dampen the stresses generated by the shaft on the motor, and locking means able to hold the angular position of the shaft in relation to the load-bearing structure.

Abstract: The present invention relates to an in-service reconfigurable antenna reflector comprising a rigid support and a membrane, deformable and having radio-electric reflectivity properties. According to the invention, the reflector comprises a plurality of coupling means connecting the rigid support and the membrane, comprising a first link of finger ball joint type connected to the rigid support, and a second link of finger ball joint type connected to the membrane. Each coupling means furthermore comprises a linear actuator, comprising a rotary motor and a screw-nut assembly, connected to the two links of finger ball joint type, and able to generate, in an operational configuration, a translational motion allowing the deformation of the membrane.

Abstract: The invention is situated in the field of telecommunication satellites. A deployable structure with which such a satellite may be equipped and a method of deploying the deployable structure is provided. The deployable structure includes: a set of primary panels, a set of secondary panels, primary articulation systems, each primary articulation system enabling a primary panel to be caused to pivot relative to another primary panel about a primary axis, the primary axes being substantially parallel to the primary panels, and secondary articulation systems, each secondary articulation system being associated with a secondary panel and enabling said panel to be caused to pivot relative to another panel about a secondary axis parallel to said panels, the deployable structure being configured in such a manner that, in a deployed configuration, the front surfaces of the panels form a substantially continuous overall surface.

Abstract: An antenna including a reflector with coverage and frequency flexibility is provided. The antenna comprises a reversible reflector having two separate reflecting surfaces shaped geometrically so as to cover respectively a first and a second geographical zone which are different and have predetermined shapes, in which the two reflecting surfaces are fastened back to back on a common support, and at least two independent sources arranged in a fixed configuration and connected to separate radiofrequency supply chains defining different and predefined operating frequency planes, the reflector having a first deployment position, in which the focal point of the first reflecting surface is located at the phase center of the first source, and a second deployment position, in which the focal point of the second reflecting surface is located at the phase center of the second source. Application notably to the field of satellite telecommunication antennae.

Abstract: The invention is situated in the field of telecommunication satellites. A deployable structure with which such a satellite may be equipped and a method of deploying the deployable structure is provided. The deployable structure includes: a set of primary panels, a set of secondary panels, primary articulation systems, each primary articulation system enabling a primary panel to be caused to pivot relative to another primary panel about a primary axis, the primary axes being substantially parallel to the primary panels, and secondary articulation systems, each secondary articulation system being associated with a secondary panel and enabling said panel to be caused to pivot relative to another panel about a secondary axis parallel to said panels, the deployable structure being configured in such a manner that, in a deployed configuration, the front surfaces of the panels form a substantially continuous overall surface.

Abstract: A deformable reflecting membrane includes, in thickness, an alternating superposition of layers of conductive elastomer and at least two reinforcing layers, each reinforcing layer being divided up into individual patches spaced apart from one another and distributed periodically in the plane of the reinforcing layer. The membrane is applicable notably to the space domain.

Abstract: An antenna including a reflector with coverage and frequency flexibility is provided. The antenna comprises a reversible reflector having two separate reflecting surfaces shaped geometrically so as to cover respectively a first and a second geographical zone which are different and have predetermined shapes, in which the two reflecting surfaces are fastened back to back on a common support, and at least two independent sources arranged in a fixed configuration and connected to separate radiofrequency supply chains defining different and predefined operating frequency planes, the reflector having a first deployment position, in which the focal point of the first reflecting surface is located at the phase centre of the first source, and a second deployment position, in which the focal point of the second reflecting surface is located at the phase centre of the second source. Application notably to the field of satellite telecommunication antennae.

Abstract: The invention relates to an antenna (ANT) comprising a radiating element (ELR) mounted above a substantially flat reflector. The radiating element (ELR) is of the broadband type and substantially flat. The reflector (SHI) has a metal periodic network (RS) of regular patterns in two dimensions, and a ground plane (PM) formed by the bottom face of the surface of the high impedance type. Each pattern of the periodic network (RS) is respectively connected to the ground plane (PM). The antenna having a thickness of the order of 1/13th of the wavelength at the minimum frequency of the frequency band.