Abstract: This invention relates to a system for emitting electromagnetic beams, comprising a network of elements for the far-field emission of electromagnetic beams, the signals coming from and/or arriving towards each element weighted by excitation coefficients digitally determined by calculation means. According to the invention, the system comprises: a second separate network of sensors arranged close to the network of radiating elements in order to measure the near field radiated by the elements, means for calculating the far field radiated by the network from the near field actually measured by the sensors, and means for calculating the correction of the excitation coefficients of the elements from the difference between the far field calculated from the measurement of the near field and a pre-determined nominal far field.

Abstract: The invention relates to an antenna that produces a radiation pattern that is axisymmetric about a geometrical axis (X) and exhibits a radiation maximum in a plane perpendicular to the direction of said X axis that includes a feed wire extending along said axis (X) from a first end situated level with a conducting surface forming an earth plane of the antenna to a second end that feeds a set of N radiating strands, N being an integer, characterized in that it also includes at least one earth return rod for the strands, said rod linking one of the radiating strands of the set to the earth plane.

Abstract: The invention relates to a device (300) for the relative positioning of an electromagnetic probe network (100) and of an object being tested (200), wherein said device includes at least a means (301) or the relative sliding of the object being tested (200) and of the electromagnetic probe network (100), capable of moving the object being tested (200) or the probe network (100) along at least one sliding direction included in a plane of the probe network (100), and on which are provided a means (320) for the relative rotation of the object being tested (200) and of the probe network (100) about a main rotation axis perpendicular to the sliding direction.

Abstract: The invention relates to a device (10) for determining at least one characteristic of the electromagnetic radiation of an object being tested, and to a probe network (100), characterised in that it comprises a means (200) for sliding said probe network (100) on itself with a relative offset between the probe network (100) and the object being tested, that is higher than the pitch of the probe network (100) in order to carry out measurements along a plurality of relative positions of the probe network (100) and the object being tested, and to access specific regions of the object being tested; means are provided for positioning, adjusting and aligning the probe network (100) relative to the object being tested in order to move towards/come to/fit onto the object being tested, and means are provided for the mechanical scanning of the probe network around or in front of the object being tested in order to carry out measurements along spherical, cylindrical or planar shapes.

Abstract: The invention relates to a device for controlling the specific absorption rate of mass-produced radiant objects. The inventive device is characterized in that it comprises: at least one sensor for measuring a power radiated by an object which is located in the zone, and at least one processing unit for analyzing the power thus measured. The aforementioned sensor consist of a waveguide comprising an opening which is disposed opposite the test zone and at least one measuring probe which is disposed inside the waveguide.

Abstract: A stacked multi-band antenna for a satellite positioning system comprises a stack of conductive patches, which are each dimension so as to be respectively operative in a dedicated frequency band. An excitation line section comprising pairs of conductive strips is arranged underneath the stack of conductive patches. Each pair of conductive strips is adapted for radiatively coupling to an associate conductive patch of the stack of conductive patches. An RF front end with at least one electric circuit is arranged in a triplate section underneath the excitation line section for operatively connecting the pairs of conductive strips to a satellite positioning receiver. The at least one electric circuit includes filters and amplifiers for respectively filtering and amplifying signals from the pairs of conductive strips, during antenna operation.

Abstract: The invention relates to a device for controlling a material, said device comprising at least means for transmitting an electromagnetic signal at a carrier frequency Fp to illuminate the material and means for receiving the electromagnetic signal, characterized in that said device further comprises first means for modulating the electromagnetic signal at a frequency Fm1, said modulation means being arranged, on the signal path, between the transmission means and the material in order to spatially sample the emitted electromagnetic signal; second means for modulating the electromagnetic signal at a frequency Fm2, said modulation means being arranged, on the signal path, between the material and the electromagnetic signal reception means in order to spatially sample the electromagnetic signal passed through the material.

Abstract: An apparatus for subdividing a sheet of brittle insulating material with a plurality of semiconductor chips disposed thereon. The chips are separated by row and column kerfs each of which contains a respective scribed line. The subdivision of the sheet is accomplished by placing the sheet in a flexible conformable carrier having an open grid, formed of ribs, with each rib positioned over a respective scribe line on the surface of the sheet and forcing the sheet against an arched anvil, thereby fracturing the sheet along the scribe lines.

Abstract: The invention relates to an antenna that produces a radiation pattern that is axisymmetric about a geometrical axis (X) and exhibits a radiation maximum in a plane perpendicular to the direction of said X axis that includes a feed wire extending along said axis (X) from a first end situated level with a conducting surface forming an earth plane of the antenna to a second end that feeds a set of N radiating strands, N being an integer, characterized in that it also includes at least one earth return rod for the strands, said rod linking one of the radiating strands of the set to the earth plane.

Abstract: An apparatus for studying the electromagnetic behavior of an electromagnetic wave-emitting or electromagnetic wave-receiving tool is provided. An anechoic chamber is configured to receive the tool as well as a person handling the tool. At least one analysis antenna is configured to pick-up the electromagnetic waves emitted from or received by the tool. Signals outputted by the analysis antenna are processed, and a radiation diagram associated with the electromagnetic tool is displayed. The radiation diagram is displayed inside the anechoic chamber so that the person handling the electromagnetic tool observes how the handling of the tool affects its electromagnetic behavior.

Abstract: A device determines at least one characteristic of electromagnetic radiation emitted from a test object. A support receives the object. A network of probes is distributed along a substantially circular arc, and the support is disposed in a plane formed by the network of probes or in a plane parallel to the plane formed by the network of probes. The network of probes or the support is pivoted in the plane formed by the network of probes or in the plane parallel to the plane formed by the network of probes about a point located in that plane to vary an angle formed between a given one of the network of probes and the support, and thereby allow measurements to be taken at plural angular positions of the network of probes relative to the test object.

Abstract: The invention relates to a device for controlling the specific absorption rate of mass-produced radiant objects. The inventive device is characterised in that it comprises: at least one sensor for measuring a power radiated by an object which is located in the zone, and at least one processing unit for analysing the power thus measured. The aforementioned sensor consist of a waveguide comprising an opening which is disposed opposite the test zone and at least one measuring probe which is disposed inside the waveguide.

Abstract: The invention relates to an arrangement for measuring the radiation of an electromagnetic device, said arrangement essentially comprising a support (20) for positioning said device, an arc (10), a network of measuring probes that are distributed over the arc (10), essentially describing a circle which is centred on the support, and means for driving the device in rotation between the support (20) and the arc (10), about a geometrical axis merged into the plane of the arc (10). The inventive arrangement is characterised in that the device support (20) and the arc (10) can also be pivoted about a geometrical axis that is transversal to the plane of the arc (10), the device including means for holding the support (20) and the arc (10) in the selected position after rotation about the second geometrical axis.

Abstract: Each of the strands being powered by a single conducting wire wherein each of these strands describes an initial segment which is radial relative to a geometric axis perpendicular to the main plane, each of the strands is extended along a circle arc center on this geometric axis and describes a substantially radial segment, directed in the direction of the geometric axis, thus running alongside radial segment directed in a direction of the geometric axis thus running alongside a radial segment of a neighbouring strand without touching the neighbouring strand.

Abstract: The invention relates to a system which is used to study the electromagnetic behaviour of an antenna or any other wave-emitting or -receiving tool. The inventive system comprises an anechoic chamber which is designed to receive one such electromagnetic tool (10) to be studied as well as the person handling said tool (10). The invention also comprises: at least one analysis antenna (20) which is used to pick up the waves emitted or received by the electromagnetic tool to be studied (10), and means (30) for processing the output signals from said analysis antenna (20). The system further comprises means (40) for displaying a radiation pattern produced for the electromagnetic tool to be studied (10). The invention is characterised in that the radiation pattern display means (40) are disposed inside the anechoic chamber, such that the person handling the electromagnetic tool to be studied (10) can directly observe the effect of his/her handling of the tool (10) on the electromagnetic behaviour thereof.

Abstract: A method and an apparatus for subdividing a sheet of brittle insulating material (a silicon wafer substrate) with a plurality of semiconductor chips disposed thereon and electrically bonded to respective underlying circuit blocks printed on the sheet to provide each chip with its own substrate. The chips are arranged in rows and columns separated by row and column kerfs each of which contains a respective scribed line.

Abstract: The invention concerns a microstrip antenna comprising a series of wires (210, 220, 230, 240) located substantially in a main common plane, each of the wires being fed by a common conductor wire (100), characterized in that each of said wires (210, 220, 230, 240) describes an initial segment (312) which is radial relative to a geometrical axis (X) perpendicular to the main plane, then each of the wires extends along an arc (214) centered on said geometrical axis (X), then describes another substantially radial segment (216), oriented towards the geometrical axis (X), hence along a radial segment (212) of the neighbouring strip without touching it.

Abstract: A centrally fed reflector antenna system has an effective reflector surface shaped so that the maximum of the copolar far field lies on the illuminated coverage area corresponding to the far field requirements, and the minimum of the copolar near field lies at the feed system, e.g. at the aperture of a feed horn.