TY - RPRT TI - Using COMSOL Multiphysics Software to Model Anisotropic Dielectric and Metamaterial Effects in Folded-Waveguide Traveling-Wave Tube Slow-Wave Circuits AU - Starinshak, David P. AU - Smith, Nathan D. AU - Wilson, Jeffrey D. PY - 2008 UR - https://ntrs.nasa.gov/citations/20080030373 ID - 20080030373 ER -