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Traveling Wave Tube (TWT) regenerative oscillators have been proposed and validated as very attractive Terahertz (GHz) sources. Microfabricated integration requires intensive attention before the feedback loop is fully built into a TWT, which makes it very important to investigate the effect of feedback attenuation in a high frequency TWT regenerative oscillator. In this paper, a 5 GHz helix TWT regenerative...
Traveling wave tube (TWT) regenerative feedback oscillators have shown promise as efficient, compact sources of terahertz (THz) regime radiation. In this paper, we present results of experimental studies of the spectral purity and stationarity of the oscillation, with particular emphasis on the transient phase following the initiation of oscillation.
A lack of compact, powerful, and efficient sources in the submillimeter-wave or terahertz (THz) frequency regime (~ 300-3000 GHz) has motivated the research on microfabricated vacuum electronic devices. Regenerative feedback traveling-wave tube (TWT) oscillators have been proposed and validated as good candidate sources of THz-regime radiation. Recently, a microfabricated folded-waveguide (FWG) TWT...
In the part of the helix TWTs' nonlinear beam-wave interaction, we developed a 3D relativistic beam-wave interaction model, which can describe the interaction process between the symmetric TMO1 mode RF electromagnetic fields and the relativistic electron beam. This model can describe the 3D RF electromagnetic fields, the 3D motion of the macro-particles, and the 2D space-charge fields. Applying the...
Recent advances of TWTCAD Integrated Framework, a 2D modeling and simulation code suite for traveling wave tube, will be presented. The use of the suite is more convenience, and the simulation result is more accurate. All modules of TWTCAD are improved. TWTCAD is applying and validating in microwave industry broadly.
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