An elementary manual of radiotelegraphy and radiotelephony for students and operators (1916)
Fleming, J. A. (John Ambrose), Sir, 1849-1945 · London, Longmans, Green & co. · leaf 180
y the wire upvertically for a certain height, and then extend it horizontally.Tiiis may be done in one, two, or more directions, and we have agallows-shaped, or T-shaped, or umbrella-shaped antenna. M l62 RADIO TELEGRAPHY This last form, with the radiating wires inclining downwards,is a favourite… … Fig. 11. There are certain forms of antennae which have the propertyof sending out electromagnetic waves more in one direction thanothers, and these are called directive antennce. They will beconsidered in a later section. For ship antenna, a special gaff or sprit is attached to a mastto give…
Radio · Telegraph, Wireless · Telephone, Wireless
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