Radio antennae

Details Radio antennae Radio antennae

1979-04-04

1981-05-26

Lieberman, Eli

Communications: radio wave antennas

Antennas

With radio cabinet

343788, 343895, H01Q 136

Patent

active

042701287

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: 2153975 (1939-04-01), Smith et al.
patent: 2511611 (1950-06-01), Wheeler
patent: 3774221 (1973-11-01), Francis
patent: 4136344 (1979-01-01), Nakao et al.

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