Thales

Marc-Yves Lienhart

Claude Chekroun

Serge Verdeyme

Michel Campovecchio

Alain Dravet

Benjamin Rouzeaud

Sebastien Bonnet

Sébastien Bonnet

The printed circuit with a multi-layer structure comprises: a first layer machined to form a spotface passing through the layer, a second layer comprising a first cavity passing through the layer, a third layer comprising, on one face, an electronic component that is in the first cavity, a fourth layer comprising a second cavity, a heat-conducting element with two parts: one made of metal, called a thermal cover, inserted into the spotface of the first layer so as to close, mechanically and electrically, the first cavity, the other made of a dielectric material with heat conduction &#x3e;30 W/(m&#xb7;K), placed in the first cavity so as to be in contact with the electronic component.

Cooled printed circuit with multi-layer structure and low dielectric losses

The invention refers to array antennas consisting of a set of individual sources set out over the surface of the antenna and whose mechanical positioning is determined in such a way as to obtain the desired radiation pattern. The process according to the invention is designed to compensate for the positioning errors of radiating elements occurring when such an antenna is constructed. These positioning errors follow a law that is in theory random and whose result is known by determining the imperfection vector I whose components of real positioning errors measured for each feed of the antenna obtained comprising components forming values of an error function &#x3b4;(n) where n represents the index attributed to the radiating element in question. The process according to the invention consists in first measuring the positioning errors. It then consists in determining the spatial spectral components making up error function &#x3b4;(n). It finally consists in applying to each component an amplitude or phase modulation correction in order to compensate for the degradation of the error function &#x3b4;(n) on the obtained antenna radiation pattern F(&#x3b8;). The process according to the invention applies more particularly to antennas comprising radiating beams.

Process compensating for array antenna radiating element positioning errors

Growing community of inventors

Paris, France

Marc-Yves Lienhart