A Microwave Gyro Amplifier With a Ferroelectric Cathode
نویسندگان
چکیده
A ferroelectric cathode is employed for the first time as the electron-beam source in a microwave amplifier tube. A PLZT 12/65/35 ferroelectric ceramic with a high dielectric constant ( 4000) is used in a form of a hollow cathode. The tube is operated in poor vacuum conditions (2 10 Torr) at room temperature, in a mechanism of a cyclotron-resonance maser amplifier. The device operates near the waveguide cutoff frequency at 6927 MHz. A 22-dB electronic gain and a 25-W output power are measured in this experiment.
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