France Telecom

Frédéric Devillers

Patrice Brachat

Philippe Ratajczak

Raymond Bills

The invention relates to a printed antenna comprising a dielectric substrate (CS, CS) supporting feeder lines (LA, LA) and first and second T-shaped dipoles (D, D) of different sizes for dual-band operation. Each dipole includes a stem (J, J) and two radiating arms (B, B) separated by a coupling slot (FC, FC) made in the stem. For compactness of the antenna, the stems are partly superimposed, the coupling slots are aligned and a decoupling cut-out (ED) is made in the second dipole so as to uncover the coupling slot of the first dipole, by virtue of their superposition. The substrate can comprise one, two or three layers. Plural antennas can constitute an antenna network used as a base element in one-dimensional or two-dimensional network.

Multi-band printed dipole antenna

An electromagnetic probe having at least one assembly including in combination: a coaxial type connectio, a ground plane connected to the outer sheath of the coaxial connection, a reflector cone placed facing the ground plane and shaped to define impedance that is at least substantially constant along its profile, the reflector being electrically isolated, and a dielectric medium interposed at least in part between the reflector cone and the ground plane.

Growing community of inventors

Nice, France

Frédéric Devillers