Abstract
ION densities of the order of 1011 ions/cm.2, such as occur in gases in glow discharges under the usual conditions, are of the correct magnitude to affect very considerably the index of refraction and absorption of these media for ultra-short radio waves. It has been found that the intensity of a beam of radiation of wave-length 9.5 cm. can be easily modulated by causing it to traverse such an ionised gas in which the ion density is caused to vary.
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LINDER, E. Modulation of Very Short Radio Waves by Means of Ionised Gas. Nature 133, 259 (1934). https://doi.org/10.1038/133259a0
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DOI: https://doi.org/10.1038/133259a0
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