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A sleeve monopole antenna in a warm plasma
Author(s) -
Egashira S.,
Morita Y.
Publication year - 1986
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs021i001p00159
Subject(s) - radius , physics , debye length , antenna (radio) , plasma , wavelength , electrical length , landau damping , electrical impedance , monopole antenna , magnetic monopole , optics , computational physics , dipole antenna , atomic physics , acoustics , slot antenna , telecommunications , computer science , computer security , quantum mechanics
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.