6. Glossary
SSPA
Transistor-based radio-frequency or microwave amplifier. This term covers not only the amplification stages, but also the ancillary functions (low-level stages, linearization, etc.) and power supply.
FET
Field-effect transistor. Generic name for unipolar transistors whose current between drain and source is controlled by a voltage applied to a gate. There are many variations in terms of architecture (MESFET, MOSFET, MISFET, JFET, HEMT...) and materials (silicon, gallium arsenide, gallium nitride, silicon carbide or indium phosphide).
Grand gap; wide gap
Semiconductor materials whose gap is such that they can withstand high electric fields (> 2 MV/cm). These materials are crystals made from atoms in columns III, V or IV, at least one...
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A complete list would be difficult to draw up in the case of the solid state, given the diversity of the players involved. It would have to include epitaxial wafer manufacturers, foundries (open or not, or even captive foundries, some of which are large industrial laboratories with a predominantly research activity), design houses, microelectronics assembly companies, transmitter manufacturers and even some...
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