MESFET power amplifier and its power supply unit, in particular for microwave signal amplification on board a satellite

摘要

PCT No. PCT/FR92/00781 Sec. 371 Date Feb. 25, 1993 Sec. 102(e) Date Feb. 25, 1993 PCT Filed Aug. 7, 1992 PCT Pub. No. WO93/03541 PCT Pub. Date Feb. 18, 1993.A power supply unit for a MESFET power amplifier is adapted to supply to the amplifier the voltages necessary for it to operate including a MESFET DC drain voltage. The power supply unit comprises a temperature-sensitive component near the MESFET(s) of the power circuit(s) so as to sense their temperature. A device slaved to a parameter delivered by the temperature-sensitive component varies the DC drain voltage in the same direction as the temperature varies so as to compensate by operation on the DC drain voltage the temperature-dependent antagonistic variation of gain and output power of the amplifier even if operating in saturation mode.