To mitigate the conventional scaling of slow-wave vacuum electronic oscillators, in which the maximum output power reduces as the frequency increases, an oversized cylindrical structure is driven by an annular electron beam. To enhance mode selectivity a two dimensional (2D) periodic lattice structure (PSL) is used. The 2D PSL consists of shallow periodic cosinusoidal perturbations in both the azimuthal and axial directions on the inner wall of a cylindrical waveguide. Analytical theory and numerical PIC simulations have been used to design the W-band oscillator that has been constructed. The ratio of the diameter of the cylindrical cross-section of the structure to the operating wavelength is ~5. The performance of this oscillator is being measured and compared with the predictions of the numerical simulations.
|Title of host publication
|2019 International Vacuum Electronics Conference (IVEC)
|Place of Publication
|Number of pages
|Published - 27 Jun 2019
|20th International Vacuum Electronics Conference (IVEC 2019) - Paradise Hotel, Busan, Korea, Republic of
Duration: 28 Apr 2019 → 1 May 2019
|20th International Vacuum Electronics Conference (IVEC 2019)
|Korea, Republic of
|28/04/19 → 1/05/19
- 2D periodic lattice
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Data for: "Excitation and Coupling of Volume and Surface Fields on Complex Electrodynamic Surfaces at Mm-wave and THz Frequencies"