Inductive radio communication system

Telecommunications – Transmitter and receiver at separate stations – Short range rf communication

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Details

455274, 246194, 343711, H04B 502

Patent

active

055488153

ABSTRACT:
An inductive radio communication system in which two sets of parallel lines are provided so as to be separated from each other at a predetermined distance therebetween along the track of a mobile unit, and a loop antenna having a double loop structure and attached on the mobile unit is disposed between the two sets of parallel lines. The loop antenna is arranged such that currents flow in the respective loops in opposite directions to each other at a certain instant. Levels of signals transmitted from the loop antenna to the parallel lines through electromagnetic coupling are added to each other when the signal levels are applied to the primary side of a level converting transformer, and then the output of the transformer is transmitted to a receiver of the ground station side, whereby the undesirable noises radiated to the outside is reduced and the coupling level between the antenna and the parallel lines through electromagnetic coupling is improved.

REFERENCES:
patent: 3527897 (1970-09-01), Masao et al.
patent: 3701102 (1972-10-01), Berman et al.
patent: 5431264 (1995-07-01), Tseng et al.

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