LOG-PERIODIC ANTENNA Russian patent published in 2010 - IPC H01Q11/10 

FIELD: physics, radio.

SUBSTANCE: invention relates to radio engineering, namely: antenna-feeder equipment and can be used to receive radio signals in the shortwave range. The log-periodic antenna consists of a double wire collecting line and not less than two pairs of dipole antennae which connected to opposite wires of the collecting line successively after every other wire, where the length of the dipole antennae and the distance between them increases moving away from the beginning of the antenna in a geometrical progression, and lines running through ends of the dipole antennae form a constant angle which does not exceed 45°. To achieve the technical result, the double-wire collecting line is made in form of series-connected resonance sections of delay-line structures having anomalous dispersion and length which does not exceed λ/8, where λ is the shortest wavelength of the operating range of the antenna.

EFFECT: design of an antenna whose length does not exceed 0,6 times of the maximum operating wavelength and retention of the range of received wavelengths achieved using a full-sized antenna.

3 dwg