Equivalent-circuit model of vircators with step circular waveguides (II)

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High-power microwaves can be generated from virtual cathode oscillators (vircator) with an abrupt discontinuity in circular waveguides. A rigorous equivalent-circuit model is established to determine the empty cavity oscillation modes, the front section of the waveguide acts as an open cavity, meaning, the Q factors, resonance frequencies, and field distributions in such vircators. The model is elaborated further to investigate the excitation of electromagnetic fields by virtual cathode oscillation in a step circular waveguide. The problem is simplified by approximating virtual cathode as a two-dimensional array of synchronized oscillating charged rings with each ring charge given from two-dimensional particle-in-cell simulation results.

Original languageEnglish
Number of pages1
JournalIEEE International Conference on Plasma Science
Publication statusPublished - 1998 Jan 1
EventProceedings of the 1998 IEEE International Conference on Plasma Science - Raleigh, NC, USA
Duration: 1998 Jun 11998 Jun 4

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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