Patent ID: 6885152

Claim:
A multilayer field emission klystron, comprising: a cathode layer, said cathode layer having a surface for emitting electrons; a collector layer, said collector layer disposed away from said cathode layer, said collector layer for collecting electrons emitted from said cathode layer; an extraction layer, said extraction layer disposed substantially between said cathode layer and said collector layer, said extraction layer for drawing electrons away from said cathode layer; a control layer, said control layer disposed substantially between said extraction layer and said collector layer, said control layer for shaping an electron beam formed by said electrons drawn away from said cathode layer toward said collector layer; an input cavity, said input cavity disposed substantially between said control layer and said collector layer, said input cavity for modulating a velocity of said electron beam; an output cavity, said output cavity disposed substantially between said input cavity and said collector layer, said output cavity for extracting energy from said electron beam; and spacer material, said spacer material forming at least a plurality of spacing layers intermediately disposed between said cathode layer and said collector layer.