Abstract: The present invention relates to a polarization device (10) for a satellite telecommunications antenna (11) including at least one frequency selective layer (12) able to convert a linear polarization (E), including two components (Ex, Ey), into left circular polarization in a first transmission frequency band (Tx) and into right circular polarization in a second receiving frequency band (Rx) or vice versa, the phase shift between the two components (Ex, Ey) of the linear polarization (E) being included between ?85 and ?95 degrees, preferably ?90 degrees in one of the frequency bands (Rx, Tx), and the phase shift between the two components (Ex, Ey) of the linear polarization (E) being included between +85 and +95 degrees, preferably +90 degrees in the other frequency band (Rx, Tx).

Abstract: A flat antenna for satellite communication includes a radiating board. The radiating board includes at least one radiating line, and an adapter configured to modify the delay of the fields transmitted or received by the radiating line. The adapter includes a horn mobile in rotation between the two metal plates containing a sensor array. The horn is also mobile in rotation between at least one coaxial cable connected between at least one sensor of the network and the radiating line. The length of the coaxial cable is suitable for introducing a delay required to focus the wave radiated by the radiating line.

Abstract: A flat antenna for satellite communication includes a radiating board. The radiating board includes at least one radiating line, and an adapter configured to modify the delay of the fields transmitted or received by the radiating line. The adapter includes a horn mobile in rotation between the two metal plates, and a multilayer power supply circuit. The first layer of the multilayer power supply circuit is formed at least one metal plate containing an array of slot sensors and the last layer of the multilayer power supply circuit is provided with at least one coupling slot connected to the radiating line. The first layer and the last layer is linked by at least one transmission line. The length of the transmission line is suitable for introducing a delay required to focus the wave radiated by the radiating line.

Abstract: A flat antenna for satellite communication includes a radiating board. The radiating board includes at least one radiating line, and an adapter configured to modify the delay of the fields transmitted or received by the radiating line. The adapter includes a horn mobile in rotation between the two metal plates containing a sensor array. The horn is also mobile in rotation between at least one coaxial cable connected between at least one sensor of the network and the radiating line. The length of the coaxial cable is suitable for introducing a delay required to focus the wave radiated by the radiating line.

Abstract: A flat antenna for satellite communication includes a radiating board. The radiating board includes at least one radiating line, and an adapter configured to modify the delay of the fields transmitted or received by the radiating line. The adapter includes a horn mobile in rotation between the two metal plates, and a multilayer power supply circuit. The first layer of the multilayer power supply circuit is formed at least one metal plate containing an array of slot sensors and the last layer of the multilayer power supply circuit is provided with at least one coupling slot connected to the radiating line. The first layer and the last layer is linked by at least one transmission line. The length of the transmission line is suitable for introducing a delay required to focus the wave radiated by the radiating line.

Abstract: The present invention relates to a polarisation device (10) for a satellite telecommunications antenna (11) including at least one frequency selective layer (12) able to convert a linear polarisation (E), including two components (Ex, Ey), into left circular polarisation in a first transmission frequency band (Tx) and into right circular polarisation in a second receiving frequency band (Rx) or vice versa, the phase shift between the two components (Ex, Ey) of the linear polarisation (E) being included between ?85 and ?95 degrees, preferably ?90 degrees in one of the frequency bands (Rx, Tx), and the phase shift between the two components (Ex, Ey) of the linear polarisation (E) being included between +85 and +95 degrees, preferably +90 degrees in the other frequency band (Rx, Tx).

Abstract: The invention pertains to an electronic sweep device with integrated active lens and light source.The device includes a bundling of superimposed channels C which are separated by thin metal planes P that include, in front of a metal short-circuit plane (10), illumination organs (S) and phase displacement organs (B).The invention makes it possible to create a compact electronic sweep device which eliminates the parasitic reflection phenomena between illuminator and lens for the purpose of controlling a hyperfrequency beam.

Abstract: Disclosed is a source of microwave radiation, namely a source enabling the absorption of multiple reflections for the illuminating of a lens in order to form an electronic sweeping antenna. The source includes a layered arrangement of elementary illuminators in a direction substantially parallel to the electrical field of the microwave energy transmitted. In one embodiment, each elementary illuminator has the following successively, in the direction of propagation of the energy: a plane forming a short circuit; a plane forming an incidence filter, parallel to the above plane, located at a distance from the above plane of the order of half of a wavelength, including two tracks parallel to each other and perpendicular to the electrical field between which resistive elements are connected; and, a plane bearing a rdiating element of the snake line type, extending in a direction substantially normal to the electrical field.

Abstract: Disclosed is a device designed to selectively absorb the electromagnetic waves coming from multiple reflections in a microwave lens. In an antenna of the type including an energy source and a lens, where the lens is formed by a plurality of parallel channels separated by conductive planes, the device has a slot made in each of the conductive planes, arranged on the input face side of the lens, and also has localized or distributed resistors connecting the two edges of the slot. The geometry of the entire unit, and the values of the resistors are such that the waves coming from multiple reflections are absorbed by the resistors.

Abstract: A method and apparatus for directionally coupling two technically different microwave transmission lines, one being a waveguide and the other a stripline, in which a central conductor of the stripline is plunged into waveguide through a slot in a wall of the waveguide and loaded by capacitors or inductors. The width of the central conductor and values of the capacitors and inductors determines the desired coupling coefficient.