LOG-PERIODIC DIPOLE ARRAY Russian patent published in 2018 - IPC H01Q11/00 

FIELD: radio engineering, communication.

SUBSTANCE: array contains a series of symmetrical dipoles, a two-wire distribution line induced by a coaxial feeder, wherein each subsequent symmetrical dipole in the row is energized in an antiphase with the preceding symmetrical dipole, and the lengths ratio of the arms of neighbouring dipoles and the ratio of the distances between the symmetrical vibrators are chosen by the ratio of the formation of the optimal log-periodic structure. Symmetric dipoles are made in the form of cylindrical conductors, and the two-wire distribution line is made in the form of tubular conductors of circular or square cross-section, the distance between which varies along the array axis according to a linear law.

EFFECT: reduction of the standing wave ratio in the coaxial array feeder and stabilization of the array gain in the frequency band with an overlap factor of at least 20.

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