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

Université Brest Bretagne Occidentale

Lotfi Batel

Christophe Delaveaud

Lionel Rudant

Jean-François Pintos

Antonio Clemente

Jean-Francois Pintos

Vincent Laur

Jean-Luc Mattei

Alexis Chevalier

A balun including first and second conductive tracks located vertically in line and at a distance from each other and having a same pattern.

Balun

The present invention relates to a radio frequency antenna () including an antenna array () operating at one wavelength and comprising:

Radiofrequency planar antenna with circular polarisation

A directional antenna network adapted to operate in at least one predetermined frequency band, which includes at least one pair of metal antennas formed by a first metal antenna and a second metal antenna, the second metal antenna being sequentially rotated by a predetermined angle of rotation relative to the first metal antenna, a load circuit, with each metal antenna connected to the load circuit, and a monopole antenna, having a central position in the antenna network, connected to the load circuit. The metal antennas and the monopole antenna are arranged on a ground plane and coupled, with the load circuit being parameterized to provide radiation, the monopole antenna having a destructive contribution of a magnetic transverse radiation mode to obtain radiation by the at least one pair of metal antennas of selected circular polarization.

Antenna network with directive radiation

A monopole wire-plate antenna that is reconfigurable in a frequency range of operation, comprising:

Frequency reconfigurable monopolar wire-plate antenna

This antenna includes: a ground plane; a capacitive roof, parallel with the ground plane; a supply probe, which is electrically isolated from the ground plane and runs between the ground plane and the capacitive roof so as to supply the capacitive roof with electricity, the supply probe being intended to be connected to a transmission line; a set of shorting wires, which are arranged in parallel around the supply probe such that each shorting wire electrically connects the capacitive roof to the ground plane, each shorting wire being coated with a magneto-dielectric material.

Monopole wire-plate antenna

A compact antenna device has a ground plane at floating potential and at least one dipole antenna extending through the ground plane. The at least one dipole antenna has first and second strands extending on either side of the ground plane. A control circuit is arranged on the ground plane in order to control the at least one dipole antenna.

Compact antenna device

A negative impedance circuit including: a first and a second bipolar transistors having a common collector, a base of the first transistor being connected to an emitter of the second transistor; a third and a fourth bipolar transistors having a common collector, a base of the third transistor being connected with an emitter of the fourth transistor; and at least one first impedance formed of one or of a plurality of passive components coupling the common collector of the first and second transistors to the common collector of the third and fourth transistors, a base of the second transistor being coupled to the collector of the third and fourth transistors and a base of the fourth transistor being coupled to the collector of the first and second transistors.

Growing community of inventors

Grenoble, France

Lotfi Batel