ON-BOARD SIGNAL SYSTEM, VEHICLE TRAFFIC SYSTEM, AND VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a constitution method of antennas in which transmission of signals can be stably continued between the ground and on board a vehicle even when a train stops so that a transposition point of a loop coil and a boundary between two loop coils applied with signals of the same frequency and the same level are positioned between an antenna installed in front with respect to the traveling direction of the train and an antenna installed in the rear with respect to the traveling direction of the train.SOLUTION: By providing a constitution installing two or more antennas A1 installed in front and rear with respect to the traveling direction of a train 1 and providing a difference in signal levels received by the respective antennas A1, even when the train 1 stops so that a transposition point 3 of a loop coil 2 is positioned between the antennas A1 installed in the front and rear with respect to the traveling direction of the train 1 and a signal received by the front antenna A1 and a signal received by the rear antenna A1 become reversed in phases and are negated, the signal with a large reception level remains without being negated, so that a prescribed transmitting/receiving level can be obtained.