Abstract: Sheet comprising a flexible support and a coating at least partially covering at least one face of the support, the support being made of a support material exhibiting dielectric properties, the coating being made of a coating material different from the support material and exhibiting magneto-dielectric properties or dielectric properties.

Abstract: A monopole wire-plate antenna that is reconfigurable in a frequency range of operation, comprising: a ground plane (1); a capacitive roof (2); a probe feed (3), which is electrically insulated from the ground plane (1), and which extends between the ground plane (1) and the capacitive roof (2) so as to electrically feed the capacitive roof (2); at least one shorting wire (4), which is arranged to electrically connect the capacitive roof (2) to the ground plane (1), and which is coated in a magneto-dielectric material (5) having a complex magnetic permeability, which varies as a function of a static magnetic field applied to the magneto-dielectric material (5).

Abstract: 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.

Abstract: A monopole wire-plate antenna that is reconfigurable in a frequency range of operation, comprising: a ground plane (1); a capacitive roof (2); a probe feed (3), which is electrically insulated from the ground plane (1), and which extends between the ground plane (1) and the capacitive roof (2) so as to electrically feed the capacitive roof (2); at least one shorting wire (4), which is arranged to electrically connect the capacitive roof (2) to the ground plane (1), and which is coated in a magneto-dielectric material (5) having a complex magnetic permeability, which varies as a function of a static magnetic field applied to the magneto-dielectric material (5).

Abstract: An electromagnetically reflective plate for a miniature antenna device includes: etched conductive elements on a first dielectric substrate layer; an apertured ground plane placed between the first substrate layer and a second dielectric substrate layer; a set of metal through-vias formed in the thickness of the two substrate layers, each including an upper end making contact with one of the conductive elements, a lower end reaching a lower face of the second substrate layer, and passing through the ground plane without electrical contact in one of its apertures. Each conductive element makes contact with a plurality of vias and each via of each conductive element is connectable to another via of a neighboring conductive element using a corresponding electrical connection making contact with the lower end of this via. At least some of the electrical connections include one or more meanders.

Abstract: 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.

Abstract: Sheet comprising a flexible support and a coating at least partially covering at least one face of the support, the support being made of a support material exhibiting dielectric properties, the coating being made of a coating material different from the support material and exhibiting magneto-dielectric properties or dielectric properties.

Abstract: A wire-plate antenna (10) comprises a ground plane (11), at least one capacitive roof (12), a feed probe (13) connected to the capacitive roof (12) and intended to be linked to a generator, and at least one electrically conductive short-circuit wire (14) linking the capacitive roof (12) and the ground plane (11). The capacitive roof (12) comprises at least one slit (15) consisting of an opening passing through the entire thickness of the capacitive roof (12) so as to emerge on each of the two opposing faces of the capacitive roof (12) and configured such that the point of connection (M1) between the capacitive roof (12) and the feed probe (13) and the point of connection (M2) between the capacitive roof (12) and the electrically conductive short-circuit wire (14) are arranged on either side of the slit (15).

Abstract: An electromagnetically reflective plate for a miniature antenna device includes: etched conductive elements on a first dielectric substrate layer; an apertured ground plane placed between the first substrate layer and a second dielectric substrate layer; a set of metal through-vias formed in the thickness of the two substrate layers, each including an upper end making contact with one of the conductive elements, a lower end reaching a lower face of the second substrate layer, and passing through the ground plane without electrical contact in one of its apertures. Each conductive element makes contact with a plurality of vias and each via of each conductive element is connectable to another via of a neighboring conductive element using a corresponding electrical connection making contact with the lower end of this via. At least some of the electrical connections include one or more meanders.

Abstract: A wire-plate antenna (10) comprises a ground plane (11), at least one capacitive roof (12), a feed probe (13) connected to the capacitive roof (12) and intended to be linked to a generator, and at least one electrically conductive short-circuit wire (14) linking the capacitive roof (12) and the ground plane (11). The capacitive roof (12) comprises at least one slit (15) consisting of an opening passing through the entire thickness of the capacitive roof (12) so as to emerge on each of the two opposing faces of the capacitive roof (12) and configured such that the point of connection (M1) between the capacitive roof (12) and the feed probe (13) and the point of connection (M2) between the capacitive roof (12) and the electrically conductive short-circuit wire (14) are arranged on either side of the slit (15).

Abstract: 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.

Abstract: 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.

Abstract: An electromagnetic wave propagation disruption device with a metamaterial structure including: a plurality of conductive elements arranged on a top face of a substrate; a plurality of interconnection networks electrically interconnecting at least some of these conductive elements, wherein these networks are not electrically connected to each other. At least two of these networks are dimensioned differently to each other, thus involving that distances between interconnected conductive elements are different from one network to another, to generate phase shifts, between the conductive elements interconnected thereby, different from one network to the other. A ground plane with holes is arranged on a bottom face of the substrate and metallic vias are formed in the substrate, each of them including an upper end in contact with a conductive elements and a lower end arranged facing one of the holes of the ground plane, with no electrical contact with the ground plane.

Abstract: 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.

Abstract: 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.

Abstract: A multibeam antenna system having a substrate forming a ground plane and a lens positioned on the substrate. At least one radiating element is positioned around the lens and configured to transmit and/or receive electromagnetic wave. A switching means enables one of the at least one radiating element to be selected. The lens is constituted by a cylindrical ring whose axis is perpendicular to the substrate.

Abstract: The present invention relates to a method for producing an antenna operating in a given frequency band, from a dual-band antenna. According to the method, the dual-band antenna is a broadband slot antenna that receives and/or transmits electromagnetic signals at a first frequency and at a second higher frequency. The antenna is powered by a single power supply line, and the free end of the power supply line is connected, by a connection means that can be opened or closed, to at least one means for rejecting one of the frequencies. This invention can be used in producing generic electronic boards.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to a wireless transmission system for signals intended more specifically for a domestic environment. It includes a central terminal comprising at least m transmission channels and n directive transmission antennas intended to transmit first signals at least one client terminal having at least one reception channel connected to a reception antenna in order to receive the first signals said central terminal and said client terminal communicating in a transmission channel having a predetermined frequency band, and an estimation device able to generate an item of information representative of the reception quality of first signals in at least one point of a predetermined geographic zone associated with the client terminal and a return channel in order to transmit said at least one item of information to the control means of the central terminal.