Rise and fall time behavior of the gyrotron backward-wave oscillator

K. F. Pao, T. H. Chang, C. T. Fan, C. F. Yu, S. H. Chen, K. R. Chu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Axial modes of the gyro-BWO are characterized by a discrete set of optimum transit angles separated by ∼2π. We show in theory that, during the rise and fall portions of the beam pulse, the frequency of a given axial mode varies in such a way that its transit angle remains at the characteristic value of the mode. Furthermore, in this transient period, axial mode competition is governed by the distinctive asymmetry of the mode profiles rather than by levels of the start-oscillation currents. A Ka-band gyro-BWO experiment has been carried out to examine the rise/fall time behavior. Time-frequency analyses of the output pulses show good agreement with theoretical predictions.

Original languageEnglish
Title of host publicationIRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics
Pages25
Number of pages1
DOIs
StatePublished - 2006
EventIRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics - Shanghai, China
Duration: 18 Sep 200622 Sep 2006

Publication series

NameIRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics

Conference

ConferenceIRMMW-THz 2006 - 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics
Country/TerritoryChina
CityShanghai
Period18/09/0622/09/06

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