Planar log periodic quad array

Details Planar log periodic quad array Planar log periodic quad array

1984-07-23

1986-06-17

Lieberman, Eli

Communications: radio wave antennas

Antennas

Logarithmically periodic

H01Q 1110

Patent

active

045959307

ABSTRACT:
A planar log periodic quad array comprising a two-conductor twisted transmission line to which log periodic elements are connected. The elements are arranged in two sets on opposite sides of the transmission line and are in a common plane. Each element has two points of connection with a particular conductor of the transmission line and comprises two sides each extending from a respective one of the two points of connection to the particular conductor to join at a corner which lies on an imaginary line perpendicular to the transmission line at its center feed point. Immediately adjacent elements of one set are connected to alternate ones of the two conductors of the transmission line and each element of the other set has a general geometric symmetry about the transmission line with respect to a corresponding element of the one set but with its points of connection to the transmission line being to the opposite conductor. The array is suited for active or passive use and has a broadband characteristic.

REFERENCES:
patent: 3202996 (1965-08-01), Tanner
Fisher, "A Log-Periodic Quad Array", CQ, Feb. 1977, vol. 33, No. 2, pp. 48-51, 72-73.

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