Communications: radio wave antennas – Antennas – With vehicle
Patent
1996-03-20
1998-05-12
Hajec, Donald T.
Communications: radio wave antennas
Antennas
With vehicle
343872, 343895, H01Q 132
Patent
active
057512515
ABSTRACT:
A closed cell foam tubular muff encircles the helical coil portion of an automobile cellular phone antenna, the muff has a slanted top surface and reduces pressure differentials around the coil. The streamlined muff thereby reduces wind-induced whistling of the antenna. An alternative device is a solid cylindrical foam insert with a plurality of depressions formed therein which engages within the coil of the antenna. Both devices not only reduce the pressure effects which lead to whistling, but also, because of their foam composition, contribute to a damping of any randomly occurring vibrations.
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Hajec Donald T.
Ho Tan
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