MICROSTRIP LOG-PERIODIC ANTENNA Russian patent published in 2015 - IPC H01Q11/10 

FIELD: radio engineering, communication.

SUBSTANCE: compared to existing antennae, the present antenna has a width of a symmetrical distribution feeder at dipole connection points selected using the relationship b_n=b₀·τ2.6^(H-n-1), where n=0…N-1, where n=0 corresponds to the longest dipole and n=N-1 corresponds to the shortest dipole. The width of the symmetrical distribution feeder at the connection point of the shortest dipole b₀ is selected such that wave impedance of the symmetrical distribution feeder W_l is equal to the wave impedance of an exciting coaxial feeder W_f. The equivalent radius of stripline dipoles is selected using the relationship a_n=a₀·τ^2.5n, wherein the equivalent radius of the longest dipole α₀ is selected equal to half the maximum width of the symmetrical distribution feeder b₀.

EFFECT: high quality of receiving and transmitting radio signals in the centimetre wavelength range, reducing the standing-wave ratio in the exciting coaxial feeder to 1,1-1,7 in the entire operating frequency range at higher antenna gain values ranging from 9,4 to 12,7 dB.

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