DIRECTOR-TYPE ANTENNA ASSEMBLY Russian patent published in 1999 - IPC

FIELD: receiving and transmitting TV images in very-high-frequency and ultrahigh- frequency bands. SUBSTANCE: director-type (all-channel) antenna assembly has director antennas of different diameters assembled on same site each incorporating boom-mounted reflector, director, and active dipole. Trapezium-shaped directors and reflectors have their longer and shorter bases selected according to waveforms corresponding to upper and lower frequency limits of bands received. Trapezium sides and their extensions are used by directors and reflectors for intermediate and limiting frequencies. All-channel antenna assembly is illustrated on Fig. 1. Antenna operating in ultrahigh-frequency band has director 1, active dipole 2, and reflector 3. Antenna designed for very-high-frequency band has director 4, active dipole 5, and reflector 6, as well as four tubes 7. Active dipoles 2 and 5 are connected to same feeder through respective matching loops. EFFECT: enlarged operating frequency band and facilitated adjustment. 1 dwg