Title :
Generation of powerful subnanosecond microwave pulses in the range of 38-150 GHz
Author :
Yalandin, Michael I. ; Shpak, Valery G. ; Shunailov, Sergei A. ; Oulmaskoulov, Marat R. ; Ginzburg, Naum S. ; Zotova, Irina V. ; Novozhilova, Yulia V. ; Sergeev, Alexander S. ; Phelps, Alan D R ; Cross, Adrian W. ; Wiggins, S. Mark ; Ronald, K.
Author_Institution :
Inst. of Electrophys., Ekaterinburg, Russia
fDate :
10/1/2000 12:00:00 AM
Abstract :
Experimental measurements of coherent stimulated radiation from intense, subnanosecond electron bunches moving through aperiodic waveguide and interacting with a backward propagating TM0.1 wave are presented. The ultra-short microwave pulses in Ka, W, and G band were generated with repetition frequencies of up to 25 Hz. Observation of RF breakdown of ambient air, as well as direct measurements by hot-carrier germanium detectors, gives an estimate of the peak power up to 140 MW for the 300-400 ps pulses at 38 GHz. The initial observation of 75 GHz 10-15 MW radiation pulses with duration less than 150 ps, and of 150 GHz microwave spikes with a risetime of 75 ps are also reported
Keywords :
backward wave oscillators; germanium radiation detectors; microwave generation; millimetre wave generation; 10 to 15 MW; 140 MW; 38 to 150 GHz; G band; Ka band; RF breakdown; TM0.1 wave; W band; aperiodic waveguide; backward-wave oscillator; coherent stimulated radiation; hot-carrier Ge detectors; intense subnanosecond electron bunches; subnanosecond microwave pulse generation; ultra-short microwave pulses; Electric breakdown; Electrons; Frequency estimation; Microwave generation; Microwave propagation; Power generation; Power measurement; Pulse generation; Pulse measurements; Radio frequency;
Journal_Title :
Plasma Science, IEEE Transactions on
