Gimballed antenna

Details Gimballed antenna Gimballed antenna

1986-05-21

1990-05-15

Hille, Rolf

Communications: radio wave antennas

Antennas

Buried underground or submerged under water

343745, 343787, H01Q 104

Patent

active

049261886

ABSTRACT:
A modified subterranean antenna structure for use in boreholes that pivotally balances a separate core member within the hollow interior of a fixed winding member in order to filter out mechanically induced vibrations from the core. The mechanical natural resonant frequency of the core is reduced and becomes less than the lowest electromagnetic signal frequency intended to be transmitted to and received by the subterranean antenna. In this way, mechanically induced vibrations will not create mechanically generated frequency signals sympathetic to the frequencies chosen for the antenna communication band frequencies.

REFERENCES:
patent: 2067337 (1937-01-01), Polatzek
patent: 2757738 (1956-08-01), Ritchey
patent: 3665955 (1972-05-01), Conner
patent: 3704466 (1972-11-01), Coyer et al.
patent: 3967201 (1976-06-01), Rorden
patent: 4216536 (1980-08-01), More
patent: 4346386 (1982-08-01), Francis et al.
patent: 4426882 (1984-01-01), Skinner
patent: 4483187 (1984-11-01), Maddock
patent: 4583589 (1986-04-01), Kasevich

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