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A re-entrant cavity resonator with carbon nanotubes cold cathode was fabricated. The cold cathode was driven by L band signal and a modulated electron emission of CNTs was achieved. An average current of 3.865 µA was recorded when a 1W/1.572GHz signal was led in the cavity, corresponding density of 193.3 µA/cm2. The highest output power was obtained at nearly 1.6S GHz frequency under 100 mW input.
In order to develop miniaturized and integrated electron vacuum devices, the multi-beam modulation in a carbon nanotube (CNT) cold cathode electron gun is investigated. Steady field-emission electron beams are modulated in an electron gun by feeding a high-frequency field between the cathodes and the anode. Simulation results of multi-beam electron gun show that phase modulation of beam can be controlled...
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