Generation of powerful subnanosecond microwave pulses in the range of 38-150 GHz

M I Yalandin, V G Shpak, S A Shunailov, M R Oulmaskoulov, N S Ginzburg, I V Zotova, Y V Novozhilova, A S Sergeev, A D R Phelps, A W Cross, Mark Wiggins, K Ronald

Research output: Contribution to journalArticlepeer-review


Experimental measurements of coherent stimulated radiation from intense, subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM01 male 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.

Original languageEnglish
Pages (from-to)1615-1619
Number of pages5
JournalIEEE Transactions on Plasma Science
Issue number5
Publication statusPublished - Oct 2000


  • backward-wave oscillator
  • microwave pulse
  • subnanosecond pulse
  • superradiance
  • electron bunches


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