ROTARY LOGOPERIODIC ANTENNA-FEEDER DEVICE Russian patent published in 2017 - IPC H01Q11/10 

FIELD: radio engineering, communication.

SUBSTANCE: device comprises fixed mast rotatably antenna sheet, fixed to the frame comprising rigid longitudinal and transverse girders and mechanically associated flexible elements forming an external frame loop and said antenna web formed set of dipoles each which comprises two arms, the conductors which are placed in planes perpendicular to the symmetrical two-wire power line installed along the longitudinal bearing beam. The first ends of the arms are connected to said line, so that each subsequent dipole energized antiphase prior dipole antenna, shoulders conductors each dipole mounted for dielectric guides formed by two cables are mechanically connected to one point with each other and the second end of the conductor arm dipole antenna cables has at an acute angle to each other and fixed at said point beyond the outer contour of the frame, and the second ends of the dielectric Aiming x close to a two-wire power line symmetrical mechanically fastened the rope stretched along the axis of symmetry of the antenna web between two supports mounted on the longitudinal supporting beam framework - one near the intersection of the longitudinal beam of plane of the longest and the shortest symmetrical vibrators, the input of the device being the end of the power line located near the shortest vibrator. The conductor constituting each dipole arm is formed as a plane curve, made up of one or more parts. At least one of the parts is provided with a shape close to the fractal curve, and the number of parts and the number of iterations to ensure the realisation of forms close to the fractal curve and the size of said conductor in planes perpendicular to the two-wire balanced line, are determined from the conditions of simultaneous approximate equality of physical shoulder conductor length of the longest dipole quarter of the wavelength corresponding to the lower operating frequency of the antenna, and the axial length of the arm from the connection point of the vibrator to conductor symmetrical two-wire power line to the opposite end equal to 0.08-0.12 of its physical length. Current conductors coordinates of each dipole further in both the vertical and horizontal planes is obtained by multiplying the current coordinates preceding the vibrator by a factor equal to the period logoperiodic structure , where and - axial length of the i-th and (i+1) -th vibrators, (i = 1 corresponds to the length of the vibrator) in areas where the conductors are directly connected to a symmetrical power supply lines operate with large and in areas most remote from the supply line with fewer iterations.

EFFECT: reduction in size of the device while retaining its efficiency, the expansion of the operating range of frequencies in the direction of the lower frequencies in the transmission.

6 cl, 4 tbl, 10 dwg