Omnidirectional antenna notably for the emission of radio or television broadcasting signals in the decimetric waveband, and radiating system formed by a grouping of these antennas

A radiating system formed by a plurality of omnidirectional antenna for emission of television or radio broadcast signals in a decimetric waveband, comprising:

• a plurality of antenna structurally supported by a single vertical central support tube, wherein all the antennas are disposed at different heights;
• a plurality of coaxial supply lines inside the central supporting tube, each coaxial supply line corresponding to one of said plurality of antennas and supplying that corresponding antenna with a signal;
• each antenna comprising a plurality of horizontal tubes symmetrically mounted to said vertical central support tube at a first height, each horizontal tube having an inner end connected to said central support tube,
• a plurality of vertical bifilary lines, each bifilary line having two ends, each bifilary line comprising two parallel lines, each bifilary line connected to and supported by an outer end of one of the horizontal tubes,
• a plurality of dipoles evenly distributed along the length of each bifilary line,
• a first means, including one of the plurality of coaxial supply lines, for transporting signals to be broadcast up through the center of the single vertical central support tube,
• a second means for transporting and symmetrically distributing said signal to be broadcast from the center of the vertical central support tube to the plurality of vertical bifilary lines, coupled to the first means for transporting, passing through the horizontal tubes and coupled to the bifilary lines, and
• wherein each bifilary line and dipoles connected thereto define a radiating network;
• and
• wherein the second means comprises a coaxial line disposed inside one of the parallel lines of a corresponding bifilary line of the plurality of bifilary lines, said coaxial line electrically connects to the corresponding bifilary line at locations halfway between the center and the two ends of the corresponding bifilary line to provide signals to the corresponding bifilary line.