Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

François Grange

Bernard Viala

Christophe Delaveaud

Christophe Delaveaux

An artificial magnetic conductor having a surface impedance greater than 100&#x3a9;, includes a ground plane, and a frequency-selective surface that is transparent for certain wavelengths and reflective for a range of wavelengths. The frequency-selective surface includes an array of conductive resonant elements arranged alongside one another in at least two different directions parallel to the ground plane. Each of these conductive resonant elements includes a sub-layer of ferromagnetic material having a relative permeability greater than 10 at a frequency of 2 GHz and having a thickness less than the skin thickness of the ferromagnetic material.

Artificial magnetic conductor, and antenna

A planar antenna with widened bandwidth comprises at least one first conducting element disposed above an earth plane and separated from the latter, and means for exciting said at least first conducting element, configured to excite two distinct orthogonal resonant modes, wherein said at least first conducting element is embodied by a substrate comprising at least one thin layer of an anisotropic material with relative permeability of greater than 10 for 2 GHz. The antenna applies notably to mobile communications terminals.

Growing community of inventors

Moirans, France

François Grange