Title :
High power solid state power amplifier design and development
Author :
Ayling, G.J. ; Joshi, J.S.
Author_Institution :
Payload Eng. Dept., British Aerosp. Space Syst. Ltd., Stevenage, UK
Abstract :
High power solid state power amplifiers (SSPAs), have greater reliability than TWTAs, require only low voltage power supplies and may be run close to saturation whilst still maintaining good intermodulation characteristics. This means that for a given output power/intermodulation characteristic the efficiencies achievable with the two technologies are comparable. This paper describes the design and evaluation of a breadboard 7 GHz 30 W SSPA output stage, intended for use in satellite TWTA replacement applications. Initial design considerations of output power, efficiency and linearity through to manufacture and evaluation of the unit is discussed. Finally, work ongoing to produce a complete 40 W SSPA to flight standard is outlined
Keywords :
III-V semiconductors; field effect transistors; gallium arsenide; hybrid integrated circuits; microwave amplifiers; microwave integrated circuits; power amplifiers; satellite relay systems; solid-state microwave devices; 30 W; 40 W; 7 GHz; GaAs; SSPA output stage; breadboard; design; design considerations; development; efficiencies; efficiency; evaluation; flight standard; high power amplifiers; intermodulation characteristics; linearity; low voltage power supplies; microwave IC; output power; reliability; run close to saturation; satellite TWTA replacement; satellite onboard amplifiers; satellite payload; semiconductors; solid state power amplifiers;
Conference_Titel :
Solid-State Power Amplifiers, IEE Colloquium on
Conference_Location :
London
