Commissariat a L'energie Atomique Et Aux Energies Alternatives

Cyril Jouanlanne

Jean-François Pintos

Christophe Delaveaud

A wire-plate antenna () comprises a ground plane (), at least one capacitive roof (), a feed probe () connected to the capacitive roof () and intended to be linked to a generator, and at least one electrically conductive short-circuit wire () linking the capacitive roof () and the ground plane (). The capacitive roof () comprises at least one slit () consisting of an opening passing through the entire thickness of the capacitive roof () so as to emerge on each of the two opposing faces of the capacitive roof () and configured such that the point of connection (M) between the capacitive roof () and the feed probe () and the point of connection (M) between the capacitive roof () and the electrically conductive short-circuit wire () are arranged on either side of the slit ().

Wire-plate antenna having a capacitive roof incorporating a slot between the feed probe and the short-circuit wire

In the field of telecommunications antennas suitable for portable communication casings, a monopole radio antenna is provided, including an etched conducting surface, including a ground plane, a structure of conducting lines, and a signal injection point in the structure of conducting lines. The structure of conducting lines comprises a first meander conducting line having multiple strands elongated in a first direction, a second meander conducting line symmetrical to the first conducting line in relation to a median line passing in the plane via the injection point and perpendicular to a general direction of elongation of the strands, the two lines starting from the injection point, and a common surface connected to the ends of the conducting lines distant from the injection point. The antenna is less sensitive to radiation efficiency reductions due to the presence of a plastic hood enclosing the antenna.

Integrated meander radio antenna

In the field of electronic apparatuses that can be held in the hand and that comprise a miniaturized radio antenna, an apparatus comprises a casing of generally parallelepipidal form with a main face and a first small side. The antenna extends partly along the main face and partly over the first side. It comprises a conductive structure divided up so as to form a meandering inductive conductive line linked to a main conductive surface which extends over most of the first side and which is folded at the ends of this first side onto a second and a third side adjacent to the main face to form two folded lateral wings, at least one respective slot being provided to separate each wing from the main conductive surface and thus narrow and lengthen the paths of the electric currents going to the folded lateral wings.

Growing community of inventors

Grenoble, France

Cyril Jouanlanne