Abstract
DIRECTIONAL wireless telegraphy is by no means a new development, for Hertz made use of reflectors at the transmitting as well as the receiving ends in order to augment the effects, and to prove that the electric waves which he had discovered obeyed, to a considerable degree, the ordinary optical laws of reflection. Senatore Marconi, in his earliest endeavours to develop a telegraph system using electric waves, also employed reflectors to increase the range and get directional working.
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FRANKLIN, C. Short-wave Directional Wireless Telegraph1. Nature 110, 220–222 (1922). https://doi.org/10.1038/110220a0
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DOI: https://doi.org/10.1038/110220a0