Theoretical and experimental investigations of oversized Ka-band surface-wave oscillator based on 2D periodical corrugated structureN.S. Ginzburg, E.V. Ilyakov, I.S. Kulagin, N.Yu. Peskov, A.S. Sergeev and V.Yu. ZaslavskyEPJ Web Conf., 149 (2017) 04031DOI: https://doi.org/10.1051/epjconf/201714904031