Previously, it has been shown that higher power microwaves can be generated from vircators with an abrupt discontinuity in circular waveguides. In this paper, the effects of the distance of the waveguide step from the anode on the microwave output and the dominant microwave frequency via two-dimensional, relativistic, electromagnetic, particle-in-cell code are investigated. As a result, it is shown that the dominant microwave frequencies are concentrated in two bands centered roughly at 8.24 and 11 GHz. As the distance of the waveguide step from the anodes increases from 0 to 7 cm, the dominant microwave frequency hops between lower and higher frequency bands. Among each band, the frequency gradually decreases with increasing distance of the waveguide step.
|Number of pages||1|
|Journal||IEEE International Conference on Plasma Science|
|Publication status||Published - 1994|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics