Abstract: Disclosed is a method for producing a stage for amplifying the power of a variable envelope signal including at least one amplifier. For each amplifier, a form of ideal variation in average power POUTL is selected. For each value of each setting parameter and for each average input power value, a value of an optimisation criterion is calculated on the basis of the mathematical expectation of at least one optimisation parameter. An optimum value of each setting parameter is determined and the amplification stage is produced with a number of amplifiers in parallel determined on the basis of an average output power value and with, for each amplifier, matching circuits providing the optimum values of the setting parameters. The invention also relates to an amplification stage produced in this manner.

Abstract: Disclosed is a method for producing a stage for amplifying the power of a variable envelope signal including at least one amplifier. For each amplifier, a form of ideal variation in average power POUTL is selected. For each value of each setting parameter and for each average input power value, a value of an optimisation criterion is calculated on the basis of the mathematical expectation of at least one optimisation parameter. An optimum value of each setting parameter is determined and the amplification stage is produced with a number of amplifiers in parallel determined on the basis of an average output power value and with, for each amplifier, matching circuits providing the optimum values of the setting parameters. The invention also relates to an amplification stage produced in this manner.

Abstract: A redundant transition device between a waveguide (1) and at least two redundant processing circuits (2, 3) includes two uncoupled coplanar lines (5, 6) formed one on either side of a single substrate plate (4) and extending, in part at least, into the waveguide (1). Each coplanar line (5) has a longitudinal end (17) for connection to one (2) of the processing circuits, and a longitudinal transfer end (16), adapted to channel an electromagnetic wave between the waveguide and the slots (21, 22) of the coplanar line. Each coplanar line (5, 6) is provided with a phase shifting element (25, 26), for inverting the phase of an electric field on one side of the central transmission strip (7, 10) of the coplanar line.

Abstract: A redundant transition device between a waveguide (1) and at least two redundant processing circuits (2, 3) includes two uncoupled coplanar lines (5, 6) formed one on either side of a single substrate plate (4) and extending, in part at least, into the waveguide (1). Each coplanar line (5) has a longitudinal end (17) for connection to one (2) of the processing circuits, and a longitudinal transfer end (16), adapted to channel an electromagnetic wave between the waveguide and the slots (21, 22) of the coplanar line. Each coplanar line (5, 6) is provided with a phase shifting element (25, 26), for inverting the phase of an electric field on one side of the central transmission strip (7, 10) of the coplanar line.

Abstract: The invention relates to a transmitter of radio signals (SMS), which are amplitude-modulated according to a discrete plurality of amplitude levels, in which at least one output power transistor (6) receives, on one of its terminals, a bias-voltage level which is adapted to the amplitude level represented by the instantaneous value of a selection signal (SS) generated by analysis means (11) on the basis of the digital control signals (1). The electrical consumption is hence optimized.

Abstract: A method and a circuit for modulating a carrier signal (Se) with a signal (SCj) having at least a modulation cell (CMi) by phase shift for receiving two digital control signals (Scji, SCji2) representing at least part of the digital modulation signal (SCj). For at least a value of the digital modulation signal (SCj), the method consists in applying on at least a common modulation cell (CMi), two digital control signals (SCji1, SCji2) of identical value, the modulation cell (CMi) delivering a signal, called a modulated elementary signal (Ssi), which is null for the digital modulation signal value (SCj).

Abstract: The invention concerns a method and a circuit for modulating a carrier signal (Se) with a signal (SCj) comprising at least a modulation cell (CMi) by phase shift for receiving two digital control signals (Scji, SCji2) representing at least part of the digital modulation signal (SCj). For at least a value of the digital modulation signal (SCj), the method consists in applying on at least a common modulation cell (CMi), two digital control signals (SCji1, SCji2) of identical value, said modulation cell (CMi) deliver a signal, called modulated elementary signal (Ssi), which is null for said digital modulation signal value (SCj).

Abstract: The invention concerns a modulating electronic circuit with m phase status m.gtoreq.2 comprising a distribution line (6) with n similar dephasing cells (Ci) n.gtoreq.2, each comprising a transistor supplying on a derivative output (ODi) an out-of-phase signal (SDi); a secondary switching/modulating stage (4) controlled on the basis of a control signal; means for summing in phase the signals derived the switching/modulating stage (4).