摘要:
The invention proposes an optimized solution of a frequency/polarization splifter that requires no adjustment after production and can be produced entirely by moulding. The polarized-wave splitter comprises various components, including a polarization splitter 1 coupled to two filters 3 and 5 via transition regions 2 and 4. The overall dimensions of the various components are such that the transfer characteristics of the splitter are better than the characteristics resulting from the sum of the characteristics of the components constituting the splitter.
摘要:
A floating microwave filter in a waveguide structure comprises filtering elements sandwiched between two foam half-bars that are placed inside a waveguide. The filtering elements are metal features etched in the surface of one of the two foam half-bars and the waveguide is an internally hollowed-out block of foam having a metallized external surface.
摘要:
The invention relates to a dipole type wideband antenna comprising a substrate presenting two faces, a first conductive arm, a second conductive arm placed on the substrate, a feeder line supplying the second arm passing under the first arm, In this case, the feeder line extending by a line element placed under the second arm, this element being dimensioned to filter a given frequency.
摘要:
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.
摘要:
The present invention relates to a method for producing an antenna comprising a conductive wire, formed by a wire, made of a conductive material, whose path has a helical shape. In accordance with the invention, such a method is characterized in that a print is formed in relief on one side of an element of an electrically insulating material such that the helical shape is generated by depositing the conductive material in this print.
摘要:
The invention relates to a microwave filter comprising a coaxial structure, consisting of a tubular outer conductor and an inner bar conductor. According to the invention, the inner bar conductor extends in an axial direction inside the outer tube and, together with said tube, forms a series of concentric slots in the axial direction thereby defining successive coaxial line segments with low characteristic impedance and coaxial line segments with high characteristic impedance. The aforementioned concentric slots are produced in a synthetic foam block.
摘要:
The invention proposes an optimized solution of a frequency/polarization splifter that requires no adjustment after production and can be produced entirely by moulding. The polarized-wave splitter comprises various components, including a polarization splitter 1 coupled to two filters 3 and 5 via transition regions 2 and 4. The overall dimensions of the various components are such that the transfer characteristics of the splitter are better than the characteristics resulting from the sum of the characteristics of the components constituting the splitter.
摘要:
The invention relates to a microwave filter comprising a coaxial structure, consisting of a tubular outer conductor and an inner bar conductor. According to the invention, the inner bar conductor extends in an axial direction inside the outer tube and, together with said tube, forms a series of concentric slots in the axial direction thereby defining successive coaxial line segments with low characteristic impedance and coaxial line segments with high characteristic impedance. The aforementioned concentric slots are produced in a synthetic foam block.
摘要:
The invention relates to a wide-band omnidirectional antenna including at least a first conducting member and a second conducting member having a revolution symmetry about a common revolution axis and central openings, said members being arranged opposite each other, at least one member having a progressively flaring area, characterised in that it comprises a gap between the conducting members and a central coaxial excitation line so as to achieve a three-dimensional contactless transition between the coaxial excitation line and the conducting members and members for modifying the radiation pattern in the flaring area of the diode type for selectively radiating the gap depending on the on- or off-state of said diodes.
摘要:
The present invention relates to a multimedia mobile terminal capable of transmitting and receiving signals compliant with several standards in the UHF band. It comprises: a receiver receiving a first signal compliant with a first standard in a first frequency band, a first transmitter capable of transmitting a second signal compliant with a second standard in a second frequency band different from the first frequency band and partially intersecting the first frequency band, wherein, between the receiver and the antenna, a calibrated band-rejection filter comprising at least one variable element enabling the selection of a rejection frequency by the control voltage of said variable element. a filtering control element to store the control voltage values and the associated rejecting frequency values determined during a calibration procedure and to transmit according to the second frequency of the first transmitter the stored control voltage of said variable element of said band-rejection filter.