Amphibious antennas for providing near vertical incidence...

Details Amphibious antennas for providing near vertical incidence... Amphibious antennas for providing near vertical incidence...

2006-02-14

2006-02-14

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

Reexamination Certificate

active

06999043

ABSTRACT:
An amphibious antenna for providing Near Vertical Incidence Skywave (NVIS) communication when grounded to a conductive fluid. The amphibious antenna has a support member for supporting a helix. The helix includes a first helical arm that is not insulated and grounded, when in use, through a conductive fluid into which the antenna is placed, and a second helical arm that is insulated from the conductive fluid.

REFERENCES:
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patent: 6011525 (2000-01-01), Piole
patent: 6014107 (2000-01-01), Wiesenfarth
patent: 6293835 (2001-09-01), Gorlov
patent: 6333722 (2001-12-01), Kitano
patent: 6338812 (2002-01-01), Ogura
patent: 6340955 (2002-01-01), Chao
patent: 6518938 (2003-02-01), Chaoo
patent: 6603433 (2003-08-01), Max et al.

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