[摘要]：We propose planar relativistic surface-wave oscillators with two-dimensional periodic gratings. Additional transverse propagating waves emerging on these gratings synchronize the emission from the wide sheet rectilinear electron beam which allows realizing a Cherenkov millimeter wave oscillator with gigawatt output power. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3701580]
