Title :
Generation of closely spaced, doublet, CFA cathode pulses with a line-type modulator
Author :
Farrell, Edward A.
Author_Institution :
Whittaker Electron. Syst., Simi Valley, CA, USA
fDate :
4/1/1991 12:00:00 AM
Abstract :
Dual-channel, line-type modulators that have advantages in size, weight, redundancy, duty cycle, and independent pulse energy adjustment are described. The dual-channel, line-type modulators are used to generate doublet cross-field amplifier (CFA) cathode pulses in a 1.25-MW peak RF power output master oscillator power amplifier (MOPA) transmitter chain. The amplifier chain consists of a 20-kW peak power traveling-wave tube, a 150-kW peak power intermediate CFA, and a final 1.25-MW CFA stage. The intermediate CFA stage modulator (22 kV and 14 A peak) and the final CFA stage modulator (35 kV and 77 A peak) are described with equipment photographs, test data, and results. The performance requirements for each CFA stage are presented. The advantages of the doublet line-type modulator in comparison to other high-power pulse modulators are presented
Keywords :
microwave amplifiers; microwave generation; modulators; travelling-wave-tubes; 1.25 MW; 14 A; 22 kV; 35 kV; 77 A; CFA cathode pulses; cross-field amplifier; duty cycle; line-type modulator; peak RF power output; peak power traveling-wave tube; pulse energy adjustment; redundancy; Cathodes; Oscillators; Power amplifiers; Power generation; Pulse amplifiers; Pulse generation; Pulse modulation; Radio frequency; Radiofrequency amplifiers; Transmitters;
Journal_Title :
Electron Devices, IEEE Transactions on
