Abstract: A microwave switching device comprises: a switching matrix with M inputs and N outputs comprising at least one surface-mount microwave switch with ohmic contacts with at least one input and at least one output position; a control bus for the one or more microwave switches of the switching matrix; a telemetry bus for the M inputs; a telemetry bus for the N outputs; a bias tee positioned on each input of the switching matrix; and a bias tee positioned on each output of the switching matrix.

Abstract: A microwave switching device comprises: a switching matrix with M inputs and N outputs comprising at least one surface-mount microwave switch with ohmic contacts with at least one input and at least one output position; a control bus for the one or more microwave switches of the switching matrix; a telemetry bus for the M inputs; a telemetry bus for the N outputs; a bias tee positioned on each input of the switching matrix; and a bias tee positioned on each output of the switching matrix.

Abstract: A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.

Abstract: A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.

Abstract: A predistortion linearization device (D) produces gain and phase expansions making it possible to compensate for the gain compression and phase variation of a power amplifier. This device (D) also allows the conventional adjustment of amplitude, the adjustment of the form of the gain and phase expansions as a function of a microwave input signal (Se).

Abstract: A predistortion linearization device (D) produces gain and phase expansions making it possible to compensate for the gain compression and phase variation of a power amplifier. This device (D) also allows the conventional adjustment of amplitude, the adjustment of the form of the gain and phase expansions as a function of a microwave input signal (Se).

Abstract: The invention relates to a predistorsion linearizer for a power amplifier operating in the microwave range, the linearizer comprising means for conferring gain and phase predistorsion which compensate the gain and phase non-linearities of the corresponding amplifier, in particular an amplifier of the electronic tube type. The linearizer is characterized in that it comprises: a “linear” first path comprising a Lange coupler having each of its two accesses grounded via a respective passive element, and a “non-linear” second path comprising a Lange coupler having each of its two accesses grounded via a respective active element, the addition of a transmission line of variable length in at least one of the two paths enabling the (non-constant) frequency response of the linearizer to be adjusted in order to compensate the response of the amplifier that is to be linearized.

Abstract: The invention relates to a predistorsion linearizer for a power amplifier operating in the microwave range, the linearizer comprising means for conferring gain and phase predistorsion which compensate the gain and phase non-linearities of the corresponding amplifier, in particular an amplifier of the electronic tube type. The linearizer is characterized in that it comprises: a “linear” first path comprising a Lange coupler having each of its two accesses grounded via a respective passive element, and a “non-linear” second path comprising a Lange coupler having each of its two accesses grounded via a respective active element, the addition of a transmission line of variable length in at least one of the two paths enabling the (non-constant) frequency response of the linearizer to be adjusted in order to compensate the response of the amplifier that is to be linearized.

Abstract: The invention relates to a device for linearizing the gain and phase of an amplifier operating in the UHF range. The gain and phase of the amplifier are linearized by conferring a predistortion of the gain and phase, which compensates for the non-linearities in gain and phase of the corresponding amplifier, notably of the electronic-tube type. The device has a first channel with a series-connected Schottky diode that receives the input signal, a second channel with a parallel-connected Schottky diode that also receives the input signal, and a coupler for phasing the output signals supplied by the first and second channels.

Abstract: A balanced and active coplanar microwave coupler for an MMIC, comprising FETs provided with metal grid, source, and drain electrodes integrated with coplanar plane metal elements combined to constitute the inlet and outlet accesses of the coupler. All of the access are constituted by an association comprising one or more CPSes and one or more CPWs.

Abstract: A double-balanced mixer for high-frequency signals includes a quad of four cold transistors in an in-line configuration, to the center of which a signal RF to be processed is fed and to each end of which a signal RF/2 whose phase relative to the signal RF is 180° is applied, and 180° couplers at the quad input and output. The mixer is designed to be implemented in the MMIC technology and to operate in the L, S, C, X or Ku band.