Analysis on Field Lines and Poynting Vectors in Corrugated Wall Waveguides

抄録

Field patterns and Poynting vectors of TM₀₁ mode in sinusoidally corrugated waveguides are analyzed numerically.It is shown that a plasma column near the axis excludes the rf electric field lines towards the peripheral region, resulting in increased Poynting vectors in the axial direction there. The excitation of TM₀₁ mode in corrugated waveguides is shown to be classified into two cases; surface and the volume waves. A possible physical explanation for the enhanced radiation observed previously from plasma filled backward wave oscillators is tried from the present results.