. An elementary manual of radiotelegraphy and radiotelephony for students and operators . me phase was half that in the third antenna. Underthese conditions, if observations are taken of the current in thereceiving antenna at equal distances, but in different azimuthsround the triple transmitter, it is found that in one direction theradiati(m is a maximum, and in the opposite direction it is nearlyzero, varying in accordance with the radii of a polar curve, asshown in Fig. 28. The method, although ingenious, has not the simplicity andpracticality of the bent receiving and transmitting antennae
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . me phase was half that in the third antenna. Underthese conditions, if observations are taken of the current in thereceiving antenna at equal distances, but in different azimuthsround the triple transmitter, it is found that in one direction theradiati(m is a maximum, and in the opposite direction it is nearlyzero, varying in accordance with the radii of a polar curve, asshown in Fig. 28. The method, although ingenious, has not the simplicity andpracticality of the bent receiving and transmitting antennae em-ployed by Marconi. Another very ingenious system of directive radiotelegraphy hasbeen devised by E ]»tllini and A. Tosi. They employ a nearlyclosed circuit transmitting antenna, consisting of two aerial wiressuspended from one mast, the upper ends being insulated and thelower ends brought into a signalling house, the wires being RA DTO TELEGRA PH V stretched out, as shown in Fig. 29, so as to give them the form ofa triangle. If oscillations are set up either by the direct coupled. 300 i<d- m ^11Fig. 28.
Size: 1748px × 1430px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
