Abstract: A radio wave transceiver system, including: at least one waveguide made of a dielectric material; a transceiver circuit coupled to a first end of each of said at least one waveguide, capable of transmitting and/or of receiving radio waves respectively propagating in said at least one waveguide; and at least one antenna coupled to a second end of said at least one waveguide, capable of transmitting and/or of receiving said waves to/from a non-guided external medium.

Abstract: The present description concerns a radio transmission device including a plurality of elementary cells, each including a transmit circuit and an antenna connected to an output terminal of the transmit circuit, each transmit circuit including a power detector coupled to its output terminal, the device further including a control circuit configured to: a) simultaneously activating in transmit mode a first cell, deactivating in transmit mode a second cell, and reading from an output node of the power detector of the second cell a signal representative of a radio frequency power received on the output terminal of the second cell via the antenna of the second cell; and b) deducing from the signal read at step a) information relative to the state of the device or of its environment.

Abstract: A UWB pulse emitter includes an H-bridge having first and second branches in parallel, a first end common to the branches being connected to a first amplitude control module to regulate a high voltage, a second end common to the branches being connected to a second amplitude control module to regulate a low voltage. A first envelope control module controls the shape of the positive portion of a UWB pulse and a second envelope control module controls the shape of the negative portion of this pulse. Each branch comprises first and second switches for respectively switching the high voltage to a first or second input of the first envelope control module and the low voltage to a first or second output of the second envelope control module. Centre taps of the branches, between which the UWB antenna is connected, connect the outputs and the inputs of the control modules.

Abstract: A radio wave transceiver system, including: at least one waveguide made of a dielectric material; a transceiver circuit coupled to a first end of each of said at least one waveguide, capable of transmitting and/or of receiving radio waves respectively propagating in said at least one waveguide; and at least one antenna coupled to a second end of said at least one waveguide, capable of transmitting and/or of receiving said waves to/from a non-guided external medium.

Abstract: Device for adjusting the locking of an injection locked frequency multiplier, including: a first input receiving a first signal of frequency f1, and a second input receiving a second signal of frequency f2 outputted by the frequency multiplier; a sub-sampler of the second signal; a control circuit configured for: receiving a third signal corresponding to the second signal sub-sampled by the first signal or by another multiple signal of frequency of f1, then carrying out a high-pass or band-pass filtering of the third signal; determining that the frequency multiplier is locked on a multiple of f1 when the signal obtained after filtering is substantially zero, then outputting a signal the value of which is representative of the locking or not of the frequency multiplier.

Abstract: A frequency synthesis device with high multiplication rank, including a base frequency generator generating two first base signals of square shape of same frequency and opposite to each other, a first synthesis stage including two first switching power supply oscillators, of which the power supplies are respectively switched by the two first base signals, a second synthesis stage including a second switching power supply oscillator of which the supply is switched by a combination of the output signals of the two first oscillators, the output of the second switching power supply oscillator being filtered by a frequency discriminator circuit realized with an injection locked oscillator.

Abstract: Device for adjusting the locking of an injection locked frequency multiplier, including: a first input receiving a first signal of frequency f1, and a second input receiving a second signal of frequency f2 outputted by the frequency multiplier; a sub-sampler of the second signal; a control circuit configured for: receiving a third signal corresponding to the second signal sub-sampled by the first signal or by another multiple signal of frequency of f1, then carrying out a high-pass or band-pass filtering of the third signal; determining that the frequency multiplier is locked on a multiple of f1 when the signal obtained after filtering is substantially zero, then outputting a signal the value of which is representative of the locking or not of the frequency multiplier.

Abstract: A frequency synthesis device with high multiplication rank, including a base frequency generator generating two first base signals of square shape of same frequency and opposite to each other, a first synthesis stage including two first switching power supply oscillators, of which the power supplies are respectively switched by the two first base signals, a second synthesis stage including a second switching power supply oscillator of which the supply is switched by a combination of the output signals of the two first oscillators, the output of the second switching power supply oscillator being filtered by a frequency discriminator circuit realized with an injection locked oscillator.

Abstract: An impulse UWB signal multi-antenna receiver with an RF front-end shared between the various antennas. The receiver includes a code multiplexing stage upstream of the RF front-end, and a code demultiplexing stage downstream of this front-end. The codes used for multiplexing and demultiplexing are orthogonal codes with timing a sub-multiple of the chip timing of the code used at transmission for modulation of the impulse UWB signal.

Abstract: The present invention relates to an impulse UWB signal multi-antenna receiver wherein an RF front-end (330) is shared between the various antennae (3101, . . . , 310M). The receiver comprises a code multiplexing stage (320) upstream of the RF front-end, and a code demultiplexing stage (340) downstream of this front-end. The codes used for multiplexing and demultiplexing are orthogonal codes with timing a sub-multiple of the chip timing of the code used at transmission for modulation of the impulse UWB signal.

Abstract: An ultra-wideband pulse generator for radio communication with phase modulation at frequencies of multiple gigahertz comprises an oscillator formed by a pair of intersecting differential branches that have two outputs connected to an LC resonant load. The transmission of a UWB pulse is caused by the application of a supply current to the differential pair over a few nanoseconds. Two current-injecting branches are respectively connected to the outputs S and S?. The control of phase modulation consists in applying an injection current to a single branch to unbalance the differential pair at the start of the generation of the UWB pulse. Depending on the side from which the injection current is applied, the oscillation at the carrier frequency will initiate with one phase or an opposite phase.

Abstract: An ultra-wideband pulse generator, for radio communication at frequencies of 2 to 11 GHz comprises an oscillator providing an output signal at carrier frequency F0 followed by a radiofrequency switching transistor and a control circuit controlling the gate of the transistor to turn it on for duration T corresponding to the desired duration of a UWB pulse. The control circuit is arranged to successively apply, during the same UWB pulse, a first gate voltage turning the transistor on with first internal resistance value for a first part of duration T, a second gate voltage that turns the transistor on with second internal resistance value, different from the first, for a second part of duration T. These internal resistances cause the oscillation to be attenuated differently for duration T of the pulse, allowing the spectrum of the pulse to maintain it within the spectral templates imposed by the radio communication standards.

Abstract: A UWB impulse receiver including an RF stage followed by a baseband processing stage. The baseband processing stage includes a Rake filter including a plurality of time fingers, each finger including an integrator of the baseband signal during an acquisition window, a control module, and a detection module estimating the received symbols from the integration results. During a synchronization phase, the control module drives respective positions of the acquisition windows associated with the different fingers, to scan at a reception interval, the RF stage only operating, in a course of the synchronization phase, during the plurality of acquisition windows.

Abstract: An ultra-wideband pulse generator for radio communication with phase modulation at frequencies of multiple gigahertz comprises an oscillator formed by a pair of intersecting differential branches that have two outputs connected to an LC resonant load. The transmission of a UWB pulse is caused by the application of a supply current to the differential pair over a few nanoseconds. Two current-injecting branches are respectively connected to the outputs S and S?. The control of phase modulation consists in applying an injection current to a single branch to unbalance the differential pair at the start of the generation of the UWB pulse. Depending on the side from which the injection current is applied, the oscillation at the carrier frequency will initiate with one phase or an opposite phase.

Abstract: An ultra-wideband pulse generator, for radio communication at frequencies of 2 to 11 GHz comprises an oscillator providing an output signal at carrier frequency F0 followed by a radiofrequency switching transistor and a control circuit controlling the gate of the transistor to turn it on for duration T corresponding to the desired duration of a UWB pulse. The control circuit is arranged to successively apply, during the same UWB pulse, a first gate voltage turning the transistor on with first internal resistance value for a first part of duration T, a second gate voltage that turns the transistor on with second internal resistance value, different from the first, for a second part of duration T. These internal resistances cause the oscillation to be attenuated differently for duration T of the pulse, allowing the spectrum of the pulse to maintain it within the spectral templates imposed by the radio communication standards.

Abstract: A UWB impulse receiver including an RF stage followed by a baseband processing stage. The baseband processing stage includes a Rake filter including a plurality of time fingers, each finger including an integrator of the baseband signal during an acquisition window, a control module, and a detection module estimating the received symbols from the integration results. During a synchronization phase, the control module drives respective positions of the acquisition windows associated with the different fingers, to scan at a reception interval, the RF stage only operating, in a course of the synchronization phase, during the plurality of acquisition windows.

Abstract: An amplification circuit including: an input for receiving an input voltage; an output for exhibiting an output voltage; a primary amplifier configured to receive the input voltage from the input, receive a primary control voltage, first amplify the input voltage by a primary gain dependent on the control voltage, the output voltage corresponding to the first amplified input voltage, and supply the output voltage to the output; and a secondary amplifier configured to receive the input voltage from the input, second amplify the input voltage by a secondary gain, the primary control voltage corresponding to the second amplified input voltage, and supply the primary control voltage to the primary amplifier. The secondary amplifier has in operation an input admittance of at least 1 millisiemens.

Abstract: A pulsed multi-channel UWB receiver. The receiver includes a first stage translating a received signal into baseband or at an intermediate frequency, a second stage carrying out quadrature mixing on the in-phase and quadrature channels of the first stage, a third stage carrying out an integration on a time window of the signals from the second stage, and a fourth stage carrying out a combination of the integration results from the third stage to provide the real part and the imaginary part of the modulation symbol. The receiver is configurable according to the receiving channel and processing type selected.

Abstract: A pulsed multi-channel UWB receiver. The receiver includes a first stage translating a received signal into baseband or at an intermediate frequency, a second stage carrying out quadrature mixing on the in-phase and quadrature channels of the first stage, a third stage carrying out an integration on a time window of the signals from the second stage, and a fourth stage carrying out a combination of the integration results from the third stage to provide the real part and the imaginary part of the modulation symbol. The receiver is configurable according to the receiving channel and processing type selected.

Abstract: An amplification circuit including: an input for receiving an input voltage; an output for exhibiting an output voltage; a primary amplifier configured to receive the input voltage from the input, receive a primary control voltage, first amplify the input voltage by a primary gain dependent on the control voltage, the output voltage corresponding to the first amplified input voltage, and supply the output voltage to the output; and a secondary amplifier configured to receive the input voltage from the input, second amplify the input voltage by a secondary gain, the primary control voltage corresponding to the second amplified input voltage, and supply the primary control voltage to the primary amplifier. The secondary amplifier has in operation an input admittance of at least 1 millisiemens.