What causes relativistic magnetron to have much lower efficiency than common magnetron? Based on the residual energy of electron stream at the anode

different factors affecting the relativistic magnetron’s efficiency

including synchronous velocity

gyral movement

depth of Brillouin flow

Lamour radius

DC space charge field and RF field

were analyzed.Comparing those factors in the typical A6 magnetron’s parameter

result shows that the intense RF field is the primary reason to lower relativistic magnetron’s efficiency.This conclusion was proved by the PIC simulation

too.