THE EXCITATION OF RESONANCES BY A DIPOLE ANTENNA INSIDE A HOLLOW CYLINDRICAL PLASMA

Authors
  1. Yip, G.L.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The problem of the excitation of resonances by a dipole antenna inside a hollow cylindrical plasma is examined. The plasma is assumed to be very cold, uniform, isotropic and lossy. A transversely oriented infinitesimally short electric dipole antenna lying on the axis of the cylindrical plasma is the source under consideration. For a thin and lossless plasma, resonances are found to occur at the two frequencies corresponding to dipolar resonances in a hollow cylindrical plasma as derived earlier by, for example, Kaiser and Closs (1952) and Vandenplas (1961). In addition, there is also an anti-resonance at the plasma frequency. The radiation resistance and radiation patterns of the plasma-covered dipole are presented to show the effects of the radii of the plasma tube, the signal frequency and the collision frequency. The possible practical implications of the present study as pertaining to the improvements of re-entry communication and the excitation of plasma resonances in ionosph
Report Number
1230 —
Date of publication
15 Jun 1972
Number of Pages
20
DSTKIM No
72-05599
CANDIS No
15923
Format(s):
Hardcopy

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