Communications: radio wave antennas – Antennas – Waterborne
Patent
1994-12-30
1996-05-14
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Waterborne
340984, 441 11, H01Q 134
Patent
active
055172024
ABSTRACT:
A buoyant antenna for providing sufficient transmission time windows for munication at ultra-high and extremely-high frequencies. The antenna is configured to float on the surface of a body of water and is connected to a vessel through a communications cable. The buoyant antenna has a length and a stabile or rotation resistant cross-section which minimizes wash over when deployed in a manner which essentially eliminates in line tension on the antenna. The antenna is cylindrically shaped with sensor elements offset from the centerline. A high density mass is placed diametrically opposite the sensor elements and a high buoyancy foam fills out the remaining cylindrical shape. The high density mass creates a righting moment to maintain the sensor elements above the water line. The absence of in line tension during communication periods serves also to eliminate any detectable wake during those communication periods. The lack of detectability makes the antenna and its deployment method particularly well suited for use when the vessel is a submarine.
REFERENCES:
patent: 2448713 (1948-09-01), Hansell
patent: 3599213 (1971-10-01), Fessenden et al.
patent: 4376941 (1983-03-01), Zenel
patent: 4675686 (1987-06-01), Robinson et al.
patent: 4962488 (1990-10-01), Dell-Imagine et al.
Kalinowski Anthony J.
Kasper Rolf G.
Patel Jayant S.
Wagner Craig A.
Hajec Donald T.
Ho Tan
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
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