Reception Characteristics of Monopole Antennas for Electron Plasma Waves

概要

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The radiation patterns of a longitudinal electron wave excited in a warm plasma by parallel plane grids and the reception patterns of wire antenna were measured experimentally, and the results agreed with the theoretically predicted radiation pattern. The reception patterns of a gridded parallel plate antenna are sharper than the theoretical radiation pattern and the sharpness depended on width of its guard ring. The dependence of the received amplitude on the D.C. potential of the antennas was studied. The possibility of estimating the wavelength from measured amplitudes is also discussed.
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