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Is magnetron used in microwave power amplifier? 

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The relativistic magnetron with diffraction output (MDO) is promising to be the most compact narrow band high power microwave source.
They confirm the theory on high efficiency microwave power amplifiers.
Large-power and high-efficiency microwave sources based on power combining from magnetrons are good candidates for industrial applications.
The obtained results demonstrate that the proposed virtual cathode amplifier scheme may be considered as the perspective high-power microwave amplifier with gain up to 18 dB, and with the following important advantages: the absence of external magnetic field, the simplicity of construction, the possibility of geometrical frequency tuning, and the amplification of relatively powerful microwave signals.
Experimental results have demonstrated the effectiveness of this magnetron-driven system for microwave industry applications.
It is shown that, under optimal conditions, the efficiency of the magnetron operation increases by ∼40% and the generated microwave power reaches the power of the electron beam.
It is the first time to demonstrate a successful microwave power combining of dual 15-kW S-band CW magnetrons.

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