Helical radio antennae

Details Helical radio antennae Helical radio antennae

1977-06-20

1979-07-10

Lieberman, Eli

Communications: radio wave antennas

Antennas

Including magnetic material

343895, H01Q 136

Patent

active

041609794

ABSTRACT:
Compact radio antennae are disclosed which comprise an extended conductor, such as a wire, arranged to form an elongated structure. The conductor is arranged in a plurality of windings comprising windings of opposite senses positioned coaxially in proximate relation. In one form the conductor is arranged in a series of helical windings all coaxial, to form a cylindrical structure, and successive windings in the series are alternately left-handed and right-handed. In another form the conductor is arranged in a first helical winding forming a cylindrical structure and a second helical winding of opposite chirality to the first, but with the same number of turns and longitudinal extent and coaxial with it. A flux-concentrating core may be longitudinally disposed within the cylindrical structure. Antennae are particularly described for the HF, VHF and UHF bands.

REFERENCES:
patent: 1495537 (1924-05-01), Stafford
patent: 2401882 (1946-06-01), Polydoroff
patent: 3689929 (1972-09-01), Moody
patent: 3965474 (1976-06-01), Guerrino et al.

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