A modulated field emission from carbon nanotubes cold cathode cavity resonator in L band frequency

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/cm 2 . The highest output power was obtained at nearly 1.6S GHz frequency under 100 mW input.