Dassault Electronique

Philippe Freyssinier

Joel Medard

Yves Poncel

The pointing of at least two sensors (,) is ensured through a Luneberg lens (,). A first frame (,) pivoting on a support (,), supports in pivoting manner a second frame (,), which can in turn support the lens (,). The second frame (,) supports at least one rail (,) for guiding the sensors in the vicinity of the focal surface of the lens. Control means (,) act on the mount as a function of data concerning the position of satellites to be sighted. They are arranged so as to temporarily stop the sighting of one of the satellites, bring the mount into an opposite position on the focal surface, whilst continually sighting the other satellite, and resume the sighting of both satellites, the two sensors then being in an inverted position on the rail.

Continuous multi-satellite tracking

An improved microstrip antenna device, in particular for telephone transmissions by satellite. An antenna comprises a first dielectric layer including on one side a ground plane and on the other a first conductive patch of a chosen shape, a second dielectric lalyer surmounts the first dielectrica layer on the side adjacent to the first patch and supports, on the other side remote from the first patch, a second cnoductive patch of a chosen shape. A third dielectric layer surmounts the second. The second patch is of a size smaller than that of the first patch and this first patch is fed from below at at least one chosen point situated between its center and its circumference. Advantageously, the first patch is connected to a lead-in of the ground plane joining a feeding circuit implanted in a dielectric substrate of a three-plate structure.

Growing community of inventors

Noisy le Roi, France

Philippe Freyssinier