| 摘要 |
PURPOSE:To secure the communication to the ground station with no interference among plural number of cars in the same region, by distributing plural number of the narrow band LF antenna over the entire width of the running path and in the vertical or oblique positions to the running path in assortment. CONSTITUTION:Loop coils 2A, 2B, 2C and 2D are distributed over the entire width of car running path surface 5 vertically (2A, 2D) or obliquely (2B, 2C). And then the oscillation signals sent from LF band oscillator 1 are radiated through distributor 10 to loci 52 and 53 of the bar antenna on the running car. The reception signal at the bar antenna becomes like (a) and (b) for loci 52 and 53 respectively, and the slice-processed waveforms feature (c) and (d) each. The UHF transmitter on the car is controlled by signals e1 and e4 plus e2 and e3 for loci 52 and 53 respectively, and then transmits the signals to UHF receiver 4 of the ground station. In this way, the communication is possible among plural number of cars in a narrow region without any mutual interference. |
