Title :
Resonant cavity vircator driven by a thermionic cathode electron beam gun
Author_Institution :
Texas Instrum., Dallas, TX, USA
fDate :
12/1/1993 12:00:00 AM
Abstract :
A resonant cavity vircator (virtual cathode oscillator) driven by an electron beam emitted from a broad-area thermionic cathode is tested. Narrow-bandwidth (1.0 MHz at the -3 dB level) excitation of the TM023 mode of a cylindrical resonant cavity is observed at a frequency of 986 MHz with a pulselength of 1.2 μs. The single-cavity-mode excitation is attributed to the constant-voltage and -current electron beam emitted from the thermionic cathode
Keywords :
cavity resonators; electron beams; electron guns; microwave oscillators; thermionic cathodes; ultra-high-frequency tubes; 1.0 MHz; 1.2 mus; 986 MHz; TM023 mode; broad-area thermionic cathode; constant current emission; constant-voltage; cylindrical resonant cavity; electron beam; narrow bandwidth excitation; pulselength; resonant cavity vircator; single-cavity-mode excitation; thermionic cathode electron beam gun; virtual cathode oscillator; Anodes; Bandwidth; Broadband antennas; Cathodes; Coils; Electron beams; Electron guns; Frequency; Resonance; Voltage;
Journal_Title :
Plasma Science, IEEE Transactions on
