Apparatus for generating modulated electron beam

摘要

The present invention relates to an apparatus for generating an electron beam. Particularly, the present invention relates to an apparatus for generating an electron beam capable of generating a modulated electron beam by using a resonator to which a micro wave and a DC voltage are simultaneously are applied. The apparatus for generating an electron beam includes a field emission cathode of emitting electrons; a resonator which includes an opening or a grid through which electrons emitted from the field emission cathode pass; a microwave applying part which applies a microwave to the resonator; a DC power part which supplies DC power to the field emission cathode; and a power supply line which connects the DC power to the field emission cathode. According to the present invention, a microwave choke structure is formed in a resonator to which a high frequency wave signal such as microwave and DC voltage are simultaneously applied, thereby generating a modulated electron beam by using a high frequency wave signal such as microwave and effectivity preventing the high frequency wave signal from being leaked to an external circuit such as a power circuit at the same time.