GPS navigation and differential-correction beacon antenna combin

Details GPS navigation and differential-correction beacon antenna combin GPS navigation and differential-correction beacon antenna combin

1994-08-08

1996-10-22

Le, Hoanganh

Communications: radio wave antennas

Antennas

With electrical shield

343788, 343726, 343728, H01Q 704, H01Q 152

Patent

active

055681620

ABSTRACT:
An antenna system comprises a stack of elements that include a GPS patch antenna on a groundplane with an associated low-noise amplifier (LNA), a first Faraday shield of flat ribbon cable covering a first ferrite rod magnetic field antenna, a second ferrite rod magnetic field antenna separated from and orthogonal to the first ferrite rod magnetic field antenna, a second Faraday shield of flat ribbon cable covering the second ferrite rod magnetic field antenna and having a LNA for each of the ferrite rod magnetic field antennas. A third Faraday shield is positioned between the first and second ferrite rod magnetic field antennas. All the Faraday shields are connected to ground such that there are no loops that may act as shorted turns to avoid desensitizing the ferrite rod magnetic field antennas.

REFERENCES:
patent: 1608974 (1926-11-01), Blatterman
patent: 4407000 (1983-09-01), Sasaki et al.
patent: 4827275 (1989-05-01), Fusinski
patent: 4890115 (1989-12-01), Hartings

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