Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1987-06-15
1988-09-20
Sikes, William L.
Communications: radio wave antennas
Antennas
Spiral or helical type
343752, H01Q 136
Patent
active
047728957
ABSTRACT:
An antenna is provided which includes first and second helical elements which are separated by a dielectric spacer. The first helical element is fed a radio frequency driving signal and the remaining second element is coupled to ground. The first and second elements are coupled together in a fashion which results in a dramatic increase in antenna bandwidth in comparison to prior helical antennas.
REFERENCES:
patent: 2503010 (1950-04-01), Tiley
patent: 2611868 (1952-09-01), Marston et al.
patent: 2996718 (1961-08-01), Foley
patent: 3852759 (1974-12-01), Felsenheld et al.
patent: 4137534 (1979-01-01), Goodnight
patent: 4148030 (1979-04-01), Foldes
patent: 4169267 (1979-09-01), Wong et al.
patent: 4229743 (1980-10-01), Vo et al.
patent: 4442438 (1984-04-01), Siwiak et al.
patent: 4490727 (1984-12-01), Kowols
Balzano Quirino
Garay Oscar M.
Kahler Mark P.
Le Hoang-anh
Motorola Inc.
Sikes William L.
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