| 摘要 |
A transceiver device capable, in particular, of transmitting signals with a GSM-R standard in automobile and railway tunnels (10) of high speed lines and including two aerials (11, 12) spaced out in a transversal position in comparison with the tunnel and connected to a radio station (13) which emits the signal; by regulating the distance between the aerials (11, 12) and the phase difference of signals for access to the same, for example through the use of a phase converter (14), excellent transmission signals can be obtained, without substantial attenuation caused by the destructive sum of propagation modes. |
