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A plasma column excited by a surface wave can act as a plasma antenna. Experimentsare carried out to study the current and conductivity distributions, field, power patterns,directivity and efficiency of such a plasma antenna. In addition, an equivalent metallic copper antennais built up and its antenna parameters are compared with that of the plasma antenna. Ourfindings indicate that the power content in the harmonics of the plasma antenna is more prominentas compared to the copper antenna (which only generates a fundamental frequency). However, thepower patterns for both antennae are quite similar. To provide a more qualitative understandingregarding the generation of harmonics in the field of the plasma antenna, a bi-spectral analysis isperformed to study the nonlinear interactions in the current fluctuations. Some specific featuresof the plasma antenna are investigated in our study, which may enhance the application prospectof the plasma antenna with respect to the conventional metallic antenna.
A plasma column excited by a surface wave can act as a plasma antenna. Experimentsare carried out to study the current and conductivity distributions, field, power patterns, directivity and efficiency of such a plasma antenna. In addition, an equivalent metallic copper antennais built up Ourfindings indicate that the power content in the harmonics of the plasma antenna is more prominentas compared to the copper antenna (which only generates a fundamental frequency). However, the power patterns for both antennae are quite similar. To provide a more qualitative understanding of the generation of harmonics in the field of the plasma antenna, a bi-spectral analysis isperformed to study the nonlinear interactions in the current fluctuations. which may enhance the application prospectof the plasma antenna with respect to the conventional meta llic antenna.