A sleeve monopole antenna in a warm plasma


  • S. Egashira,

  • Y. Morita


A sleeve monopole antenna whose length is comparable to a plasma wavelength has been studied both theoretically and experimentally in the frequency region for which there is electron plasma wave propagation. In taking account of Landau damping, it is found that if the sleeve length is larger than 25 Debye lengths, for the monopole of length 4 cm with a radius of 1 mm, then the input impedance becomes insensitive to further increase in sleeve length. The theoretical input impedances are found to be in good quantitative agreement with the experimental results.