Microwave amplifiers are devices that boost the voltage or power of the radio frequency that is fed into it from various sources like the antenna and or from other systems.
Microwave amplifiers are a solid-state RF device that provides gain, stability, power, linearity and noise reduction to the input signal and amplifies it as per the set parameters.
Solid-state amplifier systems use transistors that either have Gallium Arsenide (GaAs) or Gallium Nitrate (GaN), which is responsible for the actual amplification of the input signal. GaAs transistor has the best linearity and the GaN transistor has the best efficiency.
A microwave amplifier is a very crucial, critical, and integral device that handles a frequency range from 1 to 100GHz.
And therefore it extensively used in electromagnetic compatibility systems (EMC), Defense systems, medical and diagnostic systems, lab and field testing appliances and point to point microwave link systems.
Microwave amplifiers are fundamental devices in modern-day electronics and are a part of all electronic devices that deal have to deal with the electronic audio/video communications.
There are various types of microwave amplifiers and that includes 1) The Gyrotron, 2) The Klystron and 3) the Amplitron-also is known as Crossed-Field Amplifier (CFA) or Platinotron.
Microwave amplifiers are prone to heating up and hence amplifiers made by reputed companies have a robust built-in state of art cooling systems like the convection cooling heat sink or forced air cooling apparatus and for ultra-high power amplifiers, water cooling systems are also used.
See the Raditek website.