A newly developed leaky coaxial cable with an insulation diameter of 15 mm was adopted for train communication on osaka's subway line. the subway tunnel, with a total length of 8 kilometers, is divided in the center by a structure supporting the ceiling into two section for the double-trackline. As a result, devices for branching and combining became necessary. This need was met by developing a hybrid circuit using the coaxial code. Measurement of field strength upon completion revealed a sufficiently high level for communication.
Leaky coaxial cable for train communication
Hitachi Review ; 20 , 5 ; 204-211
1971
8 Seiten, 14 Bilder, 1 Tabelle, 4 Quellen
Article (Journal)
English
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