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The modeling, simulation, and analysis of a ladder type millimeter-wave traveling-wave tube (TWT) slow-wave structure (SWS) are presented. The simulation contains both cold and hot tests using VORPAL, a particle-in-cell (PIC) simulator that uses the conformal finite difference time domain (CFDTD) method. Beam design, dispersion, gain, and particle analysis of the ladder circuit are described.
The design and the analysis of a ladder slow-wave structure (SWS) operating at 50 GHz is presented. A 3-D particle-in-cell (PIC) modeling of a ladder SWS is presented for the first time. Compared with a conventional helix circuit, the ladder SWS provides wide bandwidth, high interaction impedance, and ease of manufacturing at millimeter wavelengths. A small-signal code based on Pierce's theory was...
A field emission based THz device suitable for MEMS fabrication had been proposed at IVNC 2004. The interactions between the electrons and the terahertz waves in a vacuum electronic device based on field emission had been studied employing a 2D finite-difference time-domain particle-in-cell simulation. The simulation results showed that the efficiency of the design corresponding to a trimmed cathode...
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