Electric Waves; An Advanced Treatise On Alternating-Current Theory
Electric Waves; An Advanced Treatise On Alternating-Current Theory
William S William Suddards Franklin
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83 causes a decrease of leakage loss and an increase of wire loss relative to the total energy of a wave. A vary very poorly insulated telephone line would be improved by the arrangement shown in Fig. 83. Digitized by QjOo^z 112 ELECTRIC WAVES. In a well-constructed telephone line the wire loss {iR^I^ is very much greater than the leakage loss {E^jR), and therefore the total loss of energy during the transmission' of a wave may be reduced by loading the line. One advantage of the loading of a t...elephone line is this reduction of line loss and the consequent increase of energy efficiency of transmission. Another advantage is that the loading of a line in which the wire loss is greater than the leakage loss reduces the wave distortion as explained in the following paragraphs. The distortionless line. — When the resistance per unit length of a transmission line (counting both wires) is related to the leak- age resistance between unit length of the wires in such a way as to cause an equal decay of the magnetic and electric fields in a wave [so that \LP = \CE^ at all times, see equation (7^)] , then the wave travels along without distortion.
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