Abstract: The invention concerns an antenna, comprising at least two non-ferrous metal plates, at least one first plate forming a radiating portion and a second plate forming a mass plane, at least one substrate, arranged between the mass plane and the radiating portion, and an excitor of length at least equal to the thickness of the substrate, extending between the mass plane and the radiating portion and connected to the radiating portion, and adapted to supply the antenna, characterised in that the substrate is a dispersive ferromagnetic substrate, called dispersive ferrite presenting, as magnetic features, a high relative magnetic permeability comprised between 10 and 10,000 and a high magnetic loss tangent greater than 0.1, said antenna comprising means for gradually and locally reducing magnetic features of the dispersive ferrite.

Abstract: The disclosure relates to a ferrite antenna comprising at least one main contour, comprising at least one first winding referred to as main winding, at least one first ferromagnetic rod referred to as main ferromagnetic rod and a tuning system, each main winding being wound around a main ferromagnetic rod and connected to the tuning system comprising a capacitor connected in parallel with the main winding. The ferrite antenna further comprises a non-resonant secondary contour, comprising a secondary winding separated electrically from each main winding and a secondary ferromagnetic rod around which the secondary winding is wound, and each main ferromagnetic rod and the secondary ferromagnetic rod are arranged parallel to one another so as to make it possible for a magnetic coupling of each main winding with the secondary winding.

Abstract: The invention relates to an antenna designed to emit and/or receive surface waves with a decametric, hectometric or kilometric central wavelength ?0, characterised in that it comprises at least one horizontal wire aerial element of between 0.5?0 and ?0 in length, and at least three vertical wire aerial elements of the same length between 0.03?0 and 0.1?0, arranged in a same plane and each comprising an upper end and a lower end, said upper ends being connected to the horizontal wire aerial element, said lower ends being designed to be connected to a conducting medium having a substantially horizontal surface. The invention also relates to an antenna, an antenna array and a use of an antenna or of an antenna array.

Abstract: A method for determining a distance to a passive intermodulation source in a device under test, the method comprising transmitting at least two signals with respective different frequencies to the device under test, receiving a complex response signal from the device under test, the complex response signal comprising a passive intermodulation of the at least two signals, generating an autocorrelation matrix using the complex response signal, the autocorrelation matrix representing power information of the complex response signal, decomposing the complex response signal, using the autocorrelation matrix, into a signal component part and a noise component part and determining a distance to the passive intermodulation source in the device under test using the noise and/or signal component part.

Abstract: The invention concerns an antenna, comprising at least two non-ferrous metal plates, at least one first plate forming a radiating portion and a second plate forming a mass plane, at least one substrate, arranged between the mass plane and the radiating portion, and an excitor of length at least equal to the thickness of the substrate, extending between the mass plane and the radiating portion and connected to the radiating portion, and adapted to supply the antenna, characterised in that the substrate is a dispersive ferromagnetic substrate, called dispersive ferrite presenting, as magnetic features, a high relative magnetic permeability comprised between 10 and 10,000 and a high magnetic loss tangent greater than 0.1, said antenna comprising means for gradually and locally reducing magnetic features of the dispersive ferrite.

Abstract: The invention relates to a surface wave antenna system, comprising at least one antenna that is electrically short in the vertical plane, with vertical or elliptic polarization and emitting a radiation, said antenna being linked to a conducting medium exhibiting a substantially horizontal surface. The antenna system being characterized in that it comprises furthermore at least one parasitic wire extending in a direction substantially parallel to the surface of the conducting medium, electrically insulated from each antenna, and arranged in the vicinity of at least one antenna in such a way as to be able to radiate by virtue of the current induced by said radiation of this antenna. The invention makes it possible to combine the resultants of each radiating element in such a way as to control the radiation pattern in the vertical plane.

Abstract: The disclosure relates to a ferrite antenna comprising at least one main contour, comprising at least one first winding referred to as main winding, at least one first ferromagnetic rod referred to as main ferromagnetic rod and a tuning system, each main winding being wound around a main ferromagnetic rod and connected to the tuning system comprising a capacitor connected in parallel with the main winding. The ferrite antenna further comprises a non-resonant secondary contour, comprising a secondary winding separated electrically from each main winding and a secondary ferromagnetic rod around which the secondary winding is wound, and each main ferromagnetic rod and the secondary ferromagnetic rod are arranged parallel to one another so as to make it possible for a magnetic coupling of each main winding with the secondary winding.

Abstract: A method for determining a distance to a passive intermodulation source in a device under test, the method comprising transmitting at least two signals with respective different frequencies to the device under test, receiving a complex response signal from the device under test, the complex response signal comprising a passive intermodulation of the at least two signals, generating an autocorrelation matrix using the complex response signal, the autocorrelation matrix representing power information of the complex response signal, decomposing the complex response signal, using the autocorrelation matrix, into a signal component part and a noise component part and determining a distance to the passive intermodulation source in the device under test using the noise and/or signal component part.

Abstract: An antenna has a predetermined operating frequency, corresponding to a predetermined wavelength, and the antenna includes: a conductive sectoral horn including one open end built into a floorplan; short-circuited radiating slots, built into the floorplan, on either side of the open end; and conductive louvres, arranged above the slots and the open end, and configured to be deployed mechanically in a continuous manner to modify a radiation pattern of the antenna. The antenna can be, for example, used in stations for testing electromagnetic fields.

Abstract: The invention relates to an antenna designed to emit and/or receive surface waves with a decametric, hectometric or kilometric central wavelength ?0, characterised in that it comprises at least one horizontal wire aerial element of between 0.5?0 and ?0 in length, and at least three vertical wire aerial elements of the same length between 0.03?0 and 0.1?0, arranged in a same plane and each comprising an upper end and a lower end, said upper ends being connected to the horizontal wire aerial element, said lower ends being designed to be connected to a conducting medium having a substantially horizontal surface. The invention also relates to an antenna, an antenna array and a use of an antenna or of an antenna array.

Abstract: A log-periodic antenna including one set of three radiating elements with log-periodic patterns, each radiating element including a succession of radiating dipoles distributed on either side of a rectilinear electrically conducting line, perpendicular to the line, a first radiating element having a rectilinear electrically conducting line substantially perpendicular to the first face of the substrate, the first ends of the electrically conducting lines of the various radiating elements being substantially aligned along a direction parallel to the first face, the rectilinear electrically conducting lines of the second and third radiating elements being situated in a same plane as the rectilinear electrically conducting line of the first radiating element and inclined with respect to the electrically conducing line of the first radiating element, the radiating dipoles of the three radiating elements being substantially perpendicular to the plane which contains the rectilinear electrically conducting lines of th

Abstract: The invention relates to a surface wave antenna system, comprising at least one antenna that is electrically short in the vertical plane, with vertical or elliptic polarization and emitting a radiation, said antenna being linked to a conducting medium exhibiting a substantially horizontal surface. The antenna system being characterized in that it comprises furthermore at least one parasitic wire extending in a direction substantially parallel to the surface of the conducting medium, electrically insulated from each antenna, and arranged in the vicinity of at least one antenna in such a way as to be able to radiate by virtue of the current induced by said radiation of this antenna. The invention makes it possible to combine the resultants of each radiating element in such a way as to control the radiation pattern in the vertical plane.

Abstract: A log-periodic antenna including one set of three radiating elements with log-periodic patterns, each radiating element including a succession of radiating dipoles distributed on either side of a rectilinear electrically conducting line, perpendicular to the line, a first radiating element having a rectilinear electrically conducting line substantially perpendicular to the first face of the substrate, the first ends of the electrically conducting lines of the various radiating elements being substantially aligned along a direction parallel to the first face, the rectilinear electrically conducting lines of the second and third radiating elements being situated in a same plane as the rectilinear electrically conducting line of the first radiating element and inclined with respect to the electrically conducing line of the first radiating element, the radiating dipoles of the three radiating elements being substantially perpendicular to the plane which contains the rectilinear electrically conducting lines of th

Abstract: The invention relates to a repeater system (1) for relaying the exchanges between a base station mobile telecommunication network and a user terminal, comprising an outside antenna (10) that can communicate with the base station, as well as retransmission means (20) connected to the outside antenna, wherein the retransmission means (20) are designed to act as the interface between the outside antenna (10) and an inside antenna (30) that can communicate with the user terminal to retransmit the signals received by either one of the antennae destined for the other antenna, characterized in that the outside antenna is an optically transparent planar antenna integrated into an optically transparent panel (2) used for the indoor lighting of a building.

Abstract: The invention relates to a printed antenna comprising a ground plane, a substrate stacked to the ground plane, a metal deposit made on the substrate in order to form therein a resonating patch (3), and a means of supplying to excite the resonating patch, characterized in that the patch has dimensions that are adapted for the patch to be able to radiate in both upper electromagnetic modes TM02 and TM20, and in that the means of supplying makes it possible to excite the patch on an excitation point (4) arranged along the patch so that the patch resonates in a single of said upper electromagnetic modes, by inducing this way a dual-beam radiation diagram with, in the same plane orthogonal to the patch, two main misaligned and symmetric lobes in relation to the normal to the patch.

Abstract: The invention relates to a printed antenna comprising a ground plane, a substrate stacked to the ground plane, a metal deposit made on the substrate in order to form therein a resonating patch (3), and a means of supplying to excite the resonating patch, characterised in that the patch has dimensions that are adapted for the patch to be able to radiate in both upper electromagnetic modes TM02 and TM20, and in that the means of supplying makes it possible to excite the patch on an excitation point (4) arranged along the patch so that the patch resonates in a single of said upper electromagnetic modes, by inducing this way a dual-beam radiation diagram with, in the same plane orthogonal to the patch, two main misaligned and symmetric lobes in relation to the normal to the patch.

Abstract: The invention relates to a repeater system (1) for relaying the exchanges between a base station mobile telecommunication network and a user terminal, comprising an outside antenna (10) that can communicate with the base station, as well as retransmission means (20) connected to the outside antenna, wherein the retransmission means (20) are designed to act as the interface between the outside antenna (10) and an inside antenna (30) that can communicate with the user terminal to retransmit the signals received by either one of the antennae destined for the other antenna, characterised in that the outside antenna is an optically transparent planar antenna integrated into an optically transparent panel (2) used for the indoor lighting of a building

Abstract: A three-band antenna is disclosed, intended in particular for cellular telecommunications. The antenna includes radiating elements operating in three frequency bands. UMTS radiating elements are separated by an optimum distance of 0.95×&lgr;m, where &lgr;m represents the average wavelength of the UMTS frequency band. The positioning of the GSM and DCS radiating elements relative to the UMTS radiating elements is fixed so that each radiating element is similarly surrounded by other radiating elements and by partition walls. The structure is periodic along a longitudinal axis. In each module of the structure, a GSM radiating element is placed at the center of a quadrangle, two adjacent vertices of which are each occupied by a DCS radiating element and the other two vertices of which are each occupied by a UMTS radiating element.

Abstract: A three-band antenna is disclosed, intended in particular for cellular telecommunications. The antenna includes radiating elements operating in three frequency bands. UMTS radiating elements are separated by an optimum distance of 0.95×&lgr;m, where &lgr;m represents the average wavelength of the UMTS frequency band. The positioning of the GSM and DCS radiating elements relative to the UMTS radiating elements is fixed so that each radiating element is similarly surrounded by other radiating elements and by partition walls. The structure is periodic along a longitudinal axis. In each module of the structure, a GSM radiating element is placed at the center of a quadrangle, two adjacent vertices of which are each occupied by a DCS radiating element and the other two vertices of which are each occupied by a UMTS radiating element.

Abstract: A crossed polarization antenna system including a substantially flat and rectangular reflector and at least one radiating cell carried by the reflector, each cell including at least two first conductor elements assembled tail-to-tail and energized by a first external power supply forming a first dipole. Each radiating cell includes two second conductor elements mounted in exactly the same way as the first elements and energized by a second external power supply forming a second dipole. The conductor elements are V-shape bent elements with the second elements mounted orthogonally to the first elements. Applications include mobile telephones.