CIRCULAR ANTENNA Russian patent published in 2009 - IPC H01Q11/10 

FIELD: physics; radio.

SUBSTANCE: circular antenna is designed for use in antenna-feeder systems to provide for robust radio communication with distant stations in any azimuthal direction. Dipole antennas of log-periodic dipole arrays located in planes of conditional multi-sided truncated pyramide with even number of sides (8 or more), according to radio facilities electromagnetic compatibility conditions, are used as driven elements added to circular antenna system of director-type (Yagi-Uda) antennas. Passive elements: reflector element and directors are located in horizontal plane, which passes through driven element; reflector element remains inside the conditional pyramide, while directors are outside. Number of directors in director-type (Yagi-Uda) antennas is determined by required horizontal-plane directivity in specified azimuth direction.

EFFECT: enhanced electromagnetic compatibility of various radio facilities within the antenna frequency range due to adaptive direction pattern formation, as well as significantly reduced effect of interference sources on relevant data acquisition.

2 cl, 2 dwg