Abstract: This invention concerns a repeater for radio frequency signals having a channel filter and an active filter connected to the channel filter output. The active filter covers the channels adjacent to the channel filter and includes an amplifier and; two bandpass filters in parallel connected as a negative feedback loop around the amplifier. The first bandpass filter covers the lower adjacent channels and the second bandpass filter covers the higher adjacent channels. The invention notably applies to the development of domestic repeaters for mobile terminals meeting the DVB-H digital television standard.

Abstract: The invention concerns a system of antennas on the same support. Each antenna is connected to a first port for the emission/reception in a first frequency band, and to a second port for the emission/reception in a second frequency band. The invention consists in a specific dimensioning of the support, such that the difference of the perimetric lengths separating the median points is a function of the half wavelength ?/2 modulo k ?, k positive integer, where ? is the wavelength corresponding to a working frequency fr.

Abstract: The present invention relates to a method for integrating an identifier circuit in a data medium formed by at least one dielectric substrate covered by a conductive layer, the conductive layer comprising a part receiving data and a part without data. The method consists in etching in the part without data of the conductive layer, at least one resonating slot forming an antenna and coupling an integrated circuit to the slot.

Abstract: A multi-antenna system feed device and a terminal including such a device is suggested. The device includes at least: a set of Wilkinson combiners, a branch of a combiner feeding an antenna, with the branches connected as inputs to a feed point; a set of switches connected between the antennas and the combiners with each switch switching a combiner branch to its corresponding antenna with the antenna being connected to the line when the switch is closed; A branch feeding an antenna, for instance, will be common to two consecutive combiners of the system. The suggested multi-antenna system feed device applies in particular to the extension of multi-antenna or sector antenna systems, used especially in devices with Multiple Inputs/Outputs of the MiMo type and more specifically to mesh network architectures.

Abstract: The present invention relates to a very compact antenna system with a diversity order of 2. An antenna system with a diversity order of 2 integrated on an electronic card comprising a first radiating element of F-inverted type with a first extremity connected to a ground plane, a second extremity free and a conductive power supply part, a second radiating element of F-inverted type with a first extremity connected to a ground plane, a second extremity free and a conductive power supply part, characterized in that the free extremities of the first and second radiating elements are opposite one another and are separated by a projecting element of the ground plane. Application in electronic cards for multi-standard communication devices.

Abstract: The present invention relates to an antenna system comprising on a substrate, at least a first and a second printed radiating elements, each supplied by a feed line, with, between the two radiating elements, at least one transmission line comprising a first extremity and a second extremity. The first and the second extremities of the transmission line are respectively coupled to the first and the second radiating elements according to a coupling function with a ratio 1:b, b>1 and a phase ?, linked to the physical difference between the radiating elements, the length of the transmission line bringing a phase difference ? such that ? compensates for ?. The invention applies to antennas compatible with WIFI.

Abstract: The present invention relates to a high rejection stop band filter and a diplexer using such filters. The stop band filter comprises on a substrate with a ground plane, a transmission line extending between an input and an output and comprises several resonators formed of “stubs” in printed open circuit embedded into the transmission line, the resonators being positioned in parallel together and interconnected in series in the same direction or head to tail. The filters are particularly useful in mobile devices operating in two concurrent frequency bands.

Abstract: The present invention relates to a multibeam antenna system comprising: a substrate forming a ground plane, a lens positioned on the substrate, at least one radiating element to transmit and/or receive electromagnetic waves positioned around the lens, and a switching means enabling the or at least one of the radiating elements to be selected, the lens being constituted by a cylindrical ring whose axis is perpendicular to the substrate. The invention notably applies in multistandard terminals.

Abstract: The present invention relates to a diversity antennas system comprising at least two antennas of the dipole type each formed by a first and a second conductive arm, supplied differentially wherein the two antennas comprise a common arm called first arm forming at least one cover for an electronic card and each one a second arm mounted in rotation at one extremity of the first arm.

Abstract: The present invention relates to a multiple-port dual-band antenna system and the associated interface formed by DPDT or SPDT switches, that can be integrated on one and the same multi-layer structure.

Abstract: The present invention relates to a system of multi-beam antennas comprising M radiating sources and P networks of N radiating elements, P being greater than 1 and N being an even whole number, the network elements being connected two by two via transmission lines of the same electrical length. In addition, the P networks are co-located at the centre of each network, the M radiating sources are each positioned at a distance Li from said centre, the distance Li being strictly less than the distance of the field called the far field and i varying from 1 to M. This system can be used with MIMO type devices.

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: The present invention relates to a compact wideband antenna of the dipole type comprising a first 1 and a second 2 conductive arm supplied differentially, one of the arms called first arm 1 forming at least one cover for an electronic card. Said type of antenna is connected to a portable electronic appliance such as a PC or similar device.

Abstract: The invention relates to a method for calibrating a terminal with a multi-sector antenna in a mesh broadcasting network that comprises at least one other terminal. The method includes: the selection of one sector of the terminal antenna to be calibrated, the reception by the selected sector, of identification signals transmitted by each of the other terminals present in the network, as well as the information on the received signal level; and the storage, for each sector, of different identification signals of the terminals present in the network, and of the information on received signal level, into the memory of the terminal to be calibrated.

Abstract: The invention consists of an antenna array, for the reception of two frequency bands, comprising two pairs of radiating elements and an network for excitation of these elements for the reception of one of the bands. The radiating elements are positioned so as to free the center of the array to allow colocalized reception of the other band. The excitation network comprises hybrid elements so as to introduce a certain phase shift between the radiating elements allowing a dual circular polarization. This network must comply with two constraints: The phase shift introduced between the hybrids must be equal to the phase shift of the hybrid modulo 2 integer. and the length of the line L1 placed between the first hybrid H1 and the first patch PA1 is such that it introduces a phase shift equal to ? modulo 2 integer.

Abstract: A printed wiring board having at least one connector includes a dielectric substrate that has, on a first face, a first ground plane, and on a second face, at least two transmission lines between which the connector and a footprint are mounted. The footprint includes a first element positioned between the two transmission lines under the connector. The first element forming with the first ground plane, a capacitive element and, at each extremity of the first element, second elements forming with the first element, a self-inductive and capacitive element. The second elements each extending by a second ground plane, the second ground planes which are connected to the first ground plane.

Abstract: The invention concerns a system of antennas on the same support. Each antenna is connected to a first port for the emission/reception in a first frequency band, and to a second port for the emission/reception in a second frequency band. The invention consists in a specific dimensioning of the support, such that the difference of the perimetric lengths separating the median points is a function of the half wavelength ?/2 modulo k ?, k positive integer, where ? is the wavelength corresponding to a working frequency fr.

Abstract: The invention relates to an antenna system for reception of channel signals from the UHF band by a receiver, comprising an electrically small antenna. The system also comprises, connected between the port connected to the antenna and that of the receiver, an active impedance matching device controlled by command signals depending on the quality of the signal received by the receiver to compensate for the impedance variations due to the environment associated with the antenna and to reject the frequencies of interfering channels adjacent to the reception channel without interfering with the active impedance matching of the antenna.

Abstract: The invention relates to a portable compact antenna formed from a first dipole type radiating element operating in a first frequency band and comprising a first and at least one second conductive arm, differentially supplied, the first arm, referred to as cold arm, forming at least one cover for an electronic card and the second arm, referred to as hot arm, being linked to the cold arm at the level of the supply. According to the invention, the hot arm comprises at least one slot resonating in a second frequency band such as the GSM band.

Abstract: The invention relates to an RF reception front end block comprising a first substrate and an RF integrated front end module integrated onto a second substrate supporting a radiating part of the antenna. The antenna is in addition formed by: a first radiating part supported by the substrate and by a junction constituted by a third radiating part connecting the first radiating part and the part supported by the substrate.