Alcatel

Alcatel Espace

Alcatel Thomson Espace

Centre National Detudes Spatiales

Daniel Renaud

Regis Lenormand

Jacques Sombrin

Hubert Diez

Marc Capdepuy

Gilles Duret

Nelson Fonseca

A unit for combining N channel signals produced by N respective separate sources, where N is an integer, comprises a collector array receiving the N channel signals in respective directions defined by array lobes associated with the collector array.

Multiplexed channel beam forming unit

An antenna pointing device capable of scanning in two orthogonal directions comprises a fixed source (20) emitting a radio beam (21) and associated with a main offset reflector (10) and a secondary offset reflector (11), together with a set of at least three mirrors (14, 15, and 17) including a first mirror (14) aligned with the secondary reflector (11), and in which the second and third mirrors (15 and 17) are fixed to respective rotary drive mechanisms (16 and 18) for rotating them about two axes (.DELTA., .DELTA.') extending in orthogonal directions. The main and the secondary reflectors (10, 11) and the first and the second mirrors (14, 15) are mechanically fixed to one another in order to constitute a moving assembly. The second mechanism (18) drives both the third mirror (17) and said moving assembly (10, 11, 14, and 15).

Antenna pointing device capable of scanning in two orthogonal directions

The antenna comprises a parabolic reflector (1) and a primary source (2). The reflector (1) comprises a first grating of conductor wires (7) and a second grating of conductor wires (8) which are orthogonal to the wires of the first grating, and with both gratings constituting elliptical reflective surfaces. The sizes of the major and minor axes of the ellipses are determined in such a manner that both operating frequencies of the antenna have identical coverge zones on the surface of the globe.

Crossed polarization same-zone two-frequency antenna for

Growing community of inventors

Frouzins, France

Daniel Renaud