OMNIDIRECTIONAL ANTENNA, PARTICULARLY FOR THE TRANSMISSION OF RADIOBROADCAST OR TELEVISION SIGNALS IN THE UHF BAND, AND RADIATING SYSTEM MADE OF SEVERAL SUCH ANTENNAS

摘要

abr. (g). descriptionomni-directional antenna for transmission of signalsradio and television broadcasting waves in the hf band.a system consisting of a group and the antennas.the antenna, particularly for radio signalsbroadcast or television in the ultra high frequency band of the microwave.includes:a tube (100), a central vertical support.a plurality of radiating channels (200) preferably identical.the number of regularly spaced around the central tube, andeach vertical line formed with lines (210210).connecting and supplying a plurality of symmetricalhorizontal dipole (220220) regularly distributed along theline 2.a power distribution system u00e9quiphase u00e9quipuissance.preferably housed entirely within the central support tube.and, at the same time, the three networks into the sameradiating out from a feeding coaxial line.the antenna has no reflector, which significantly reducedthe weight and the wind compared to conventional antennasigns used in the band.advantageously, these antennas are superimposed and enclosed in asecure watertight, substantially cylindrical in shape. type and similar.the antenna provides omnidirectional pattern of 0.9 db460 and 860 mhz, and can reach 5 to 7 kw per antenna element.(see figure 1).