Television transmitting antenna of decimeter band system based on tubes 720 and 1020 mm in diameter

The IV and V television bands (470 to 638 and 638 to 790 MHz) are singled out for further growth of the television networks. In the development of antenna systems for the transmitting stations of these bands, systems based on tetrahedral lattice supports with a width of a tetrahedral face of more than one meter, a number of difficulties appear which are caused by the short length of the transmitted wave. A polar diagram in the horizontal plane of the antenna, the panels of which are arranged on the sides of the tetrahedral supports of such dimensions, substantially differs from the sperical. An acceptable polar diagram, close to spherical, is obtained with transverse dimensions of the load-carrying structure approximately equal to 300 x 300 mm. An antenna system called the Noligan 720 is described and its technical parameters are presented. The dependence is given in a table of the load-carrying capacity of the system and the amplification of the system, with reference to a half-wave dipole, on the length of the feeder. The ADT 7006 antenna panel is described and technical data on it are presented. The system described uses coaxial distribution of four types (AVT 8002, 8013, 8023, and 8062) intended for distribution of high frequency energy.