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The technique of impedance and admittance matrices allows a simple and elegant solution of the problem of radiation from antennae of arbitrary shape and orientation in plane stratified geometry. The medium towards which the antenna radiates is completely characterised by the values of these matrices at its surface. Combined with the variational approach originally developed for the case of fast wave launching by Teilhaber and Jacquinot, this method allows the determination of the self-consistent current distribution in the antenna, its radiation resistance and its reactive impedance. The flexibility of the approach is illustrated by several examples, both without and with plasma loading. They include a discussion of the characteristics of the folded antenna which will be used for fast-wave ICR heating in the ASDEX Upgrade tokamak, and of T-antennae for launching ion Bernstein waves near the first ion cyclotron harmonic.

Additional information

Authors: BRAMBILLA M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion, Vol. 35 (1993) pp. 41-62
Record Number: 199310586 / Last updated on: 1994-11-29
Original language: en
Available languages: en