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US 4,376,941 AGranted
Antenna cable
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorJoseph A. Zenel
Life of this patent
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Abstract
A distributed loop antenna is embodied in a flexible cable structure for marine E.L.F. (extremely low frequency) radio reception. Several distributed loop and magnetic core configurations which provide "side-looking" reception are described, as is the ability of flexible distributed loops to minimize the induction of noise voltages in the antenna.
Claims7
A flexible antenna cable structure adapted to be streamed aft from a submarine for use in E.L.F. radio reception, said antenna cable structure comprising:
- a flexible, metallic, central strength member;
- a first layer overlying said strength member and formed of a flexible, electrically insulating, waterproof material;
- a second layer overlying said first layer and formed of a resilient, electrically insulating foam material;
- distributed loop antenna means disposed on said second layer;
- and
- a third layer surrounding said distributed loop antenna means and said second layer, said third layer being formed of a resiliently flexible, waterproof, and electrically insulating material.
3 more elements
Dependencies are inferred from the claim text.