Alcatel Espace

Alcatel N.v.

Olivier Remondiere

Gerard Raguenet

Regis Lenormand

Gerard Caille

Jean-Francois David

Jean-Louis Cazaux

Michel Coustere

An array antenna in particular for space applications comprises radiating elements having a stratified type of structure. These elements are fixed on a support structure having openings beneath the radiating elements.

Array antenna, in particular for space applications

A radiating device for a planar antenna, said device including a first ground plane and a second ground plane, a slot (25) provided in the first ground plane and being fed by electromagnetic coupling from a feed line (17), and an assembly of a plurality of thin conductive parts; the central portion of the radiating slot (25) being a conductive part (15) supported at its center by a supporting column (18). Application in particular to the space field.

Radiating device for a plannar antenna

The invention relates to a structure for making microwave circuits and components, in which the mechanical and electrical functions are integrated overall but dissociated locally. The invention is particularly suitable for space applications.

Structure for making microwave circuits and components

A high-efficiency active printed-circuit antenna system for pulsed frequency-hopping space radar electronically scanned in two planes encompasses in its timing diagram the transmission of a horizontal polarization pulse, the reception of echoes from a previous horizontal polarization pulse, the transmission of a vertical polarization pulse and the reception of echoes from a previous vertical polarization pulse. The system comprises several thousand MMIC modules distributed over the antenna and each connected to a printed-circuit radiating element comprising a plurality of dual polarized square patches connected by microstrip lines which excite them with the same amplitude and the same phase at two perpendicular ports. Switching between the two ports procures transmission or reception with horizontal or vertical polarization.

High-yield active printed-circuit antenna system for frequency-hopping

The invention relates to a space reentry vehicle high-temperature skin antenna comprising a printed antenna embedded in a tile for providing thermal protection, and fed by electromagnetic coupling. The invention is particularly applicable to space telecommunications.

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Frouzins, France

Olivier Remondiere