Equivalent radio frequency transmission of a single programme by means of a sequence of antennas with orthogonal polarisation for two consecutive antennas

摘要

Process and device for isofrequency radiobroadcasting intended for receiving, on board a vehicle, a single programme throughout the route travelled, in which transmitters provided with at least one transmitting antenna (En-2; En-1; En) are arranged in the vicinity of the route, characterised in that the transmitting antenna (En-2; En-1; En) is inclined by 45 DEG relative to the vertical so as to be orthogonal to that (En-1; En; En+1) of the neighbouring transmitter also inclined by 45 DEG but in the opposite direction. The polarization of the field transmitted thus makes an angle of 45 DEG with the vertical and the polarities of the transmitting antennas of two neighbouring transmitters make an angle of 90 DEG between one another. IMAGE