Log-periodic antenna

Details Log-periodic antenna Log-periodic antenna

1984-10-09

1986-12-16

Lieberman, Eli

Communications: radio wave antennas

Antennas

Logarithmically periodic

H01Q 1110

Patent

active

046300635

ABSTRACT:
A log-periodic antenna comprises two arrays of dimensionally tapered radiating elements disposed in the E-plane and each fed by a balanced line consisting of the inner conductors of two coaxial cables. In one embodiment the elements of each array are dipoles and in another embodiment are formed of continuous conductive strips in zig-zag patterns on non-conductive support members. Each array preferably has two sets of elements disposed in planes, respectively, which converge toward the smaller end of the array with vertically aligned radiating elements of each set projecting in opposite directions from the array axis. Periodic gain dropout anomalies across the antenna operating band are eliminated by use of a shielded feed line.

REFERENCES:
patent: 3110030 (1963-11-01), Cole
patent: 3366964 (1968-01-01), Ramsay et al.
patent: 3641579 (1972-02-01), Voronoff

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