GaN Solid-State Power Amplifiers

The transformation of solid-state amplifiers for satellite communication systems from use of Gallium Arsenide (GaAs) transistors to Gallium Nitride (GaN) transistors has occurred at an astonishing rate. Not long ago nearly all comms SSPAs were built using GaAs technology, and now it would be hard to find a recently developed satcom SSPA that was not built using GaN. So why is GaN the unequivocal technology of choice?

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