@article{3031251,
    title = "Investigation of Cylindrical Waveguides with Periodic Wedge-Shaped
Azimuthal Corrugations Excited by TE Modes Using the FDTD Method",
    author = "Peponis, V, Dimitrios and Latsas, George P. and Tigelis, Ioannis G.",
    journal = "Journal of Infrared, Millimeter and Terahertz Waves",
    year = "2021",
    volume = "42",
    number = "7",
    pages = "761-771",
    publisher = "Springer-Verlag",
    issn = "1866-6892, 1866-6906",
    doi = "10.1007/s10762-021-00809-3",
    keywords = "Gyrotron beam tunnel; Azimuthal corrugations; Scattering parameters;
FDTD; Mode conversion",
    abstract = "Modern gyrotron beam tunnels are rather complicated structures designed
to enhance the suppression of the parasitic oscillations, which may be
excited there. In some beam tunnel designs, azimuthal corrugations are
engraved on their walls to further improve the suppression of these
oscillations. In this work, we investigate the effect of the geometrical
properties of the corrugations on the propagation characteristics of TE
modes for the simplified model of a smooth waveguide with an azimuthally
corrugated region. For this structure, the scattering parameters are
calculated and the mode conversion is investigated with the in-house
FDTD code COCHLEA."
}