Global position satellite antenna

Details Global position satellite antenna Global position satellite antenna

1988-07-28

1989-10-31

Hille, Rolf

Communications: radio wave antennas

Antennas

With housing or protective covering

343797, H01Q 142, H01Q 2126

Patent

active

048780626

ABSTRACT:
A low profile, low drag, broad-banded antenna system includes four substantially identical antenna elements in intimate contact with a hemisphere of high dielectric constant material. The antenna elements are equally spaced from each other around the hemisphere and are connected to a power divider circuit for reception of incoming signals from a global position satellite having circular polarization. A dielectric phase equalizing member of variable thickness surrounds the antennas in intimate contact therewith for improving the axial ratio particularly at low angles of radiation. The dielectric phase equalizing member is also formed from a high dielectric constant material. A radome of a radio transparent material covers the assembly to provide an aerodynamic configuration and to protect the antenna from the weather. The antenna has a gain from approximately -2.5 dBic at 10.degree. above the horizon to approximately +3 dBic at 30.degree. above the horizon.

REFERENCES:
patent: 3811127 (1974-05-01), Griffee et al.
patent: 4414550 (1983-11-01), Tiesselt
patent: 4431998 (1989-02-01), Finken
patent: 4675685 (1987-06-01), Finken

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