Thales

Michel Jousset

Stéphane Mallegol

Pierre Belec

Gaelle Samson

Xavier Begaud

Michael Grelier

Gaetan Guevel

Michaël Grelier

Anne Claire Lepage

Yonnec'h Coupa

The invention relates to a wire antenna adapted to operate in at least one predetermined frequency band, comprising a plurality of superimposed layers, comprising at least one radiating element placed on a support layer, wherein the support layer is placed on a spacer substrate, and wherein the spacer substrate is placed on a reflector plane comprising at least one resistive layer between the support layer of the radiating element(s) and the substrate spacer, while the resistive layer comprises at least two sets of nested resistive patterns. This antenna is such that the sets of resistive patterns have resistance values gradually varying between a central antenna point and an outer edge of the antenna, in order to achieve a resistance gradient.

Broadband wire antenna with resistive patterns having variable resistance

In the field of circular-polarized planar wire antennas for very wide band telecommunications systems, and an antenna reflector for such an antenna, an antenna device comprises an antenna reflector and an antenna, and a method for implementing the antenna reflector. The antenna reflector comprises, on the one hand, a first reflection region exhibiting electromagnetic properties of an electrical conductor in a first sub-band of frequencies and, on the other hand, a second reflection region exhibiting electromagnetic properties akin to a magnetic conductor in a second sub-band of frequencies. Each reflection region is designed to face a region of the antenna able to emit electromagnetic radiation in the corresponding sub-band of frequencies in order to reflect the electric field of the backward radiation in phase with the electric field of the forward radiation.

Broadband antenna reflector for a circular-polarized planar wire antenna and method for producing said antenna reflector

In the field of wideband directional antennas employing linear polarization, and in particular in the context of amplitude goniometry systems, polarization purity defects lead to deformation of the radiation diagrams that increases with the elevation, inducing degraded detection system location performance. An antenna is provided operating with linear polarization and having radiating elements of 'sinuous' shape inscribed within a circle, and includes radiating elements printed on the two faces of a support, the elements of the first face being deduced from those of the other face by a rotation.

Wideband, directional, linearly polarized antenna having high polarization purity

Growing community of inventors

Ploumoguer, France

Michel Jousset