Communications: radio wave antennas – Antennas – Plural antennas
Patent
1994-08-23
1996-09-03
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Plural antennas
343853, 343700MS, 343DIG2, H01Q 138
Patent
active
055527981
ABSTRACT:
An antenna (70) includes a first sub-structure (72) having a major plane that is oriented at a first angle (for example, 90.degree.) with respect to an axis (normal) that is perpendicular to the surface of the earth. The antenna also includes a plurality (for example six) of second sub-structures (74) individual ones of which have a local major plane that is disposed at a second angle (for example, 45.degree.) to the major plane of the first sub-structure. Each of the plurality of sub-structures have an outwardly pointing normal from the local major plane that is oriented at a third angle (for example, 60.degree.) around the axis from an outwardly pointing normal of an adjacent one of the sub-structures. The outwardly pointing normal of each of the plurality of sub-structures is disposed so as to point away from the axis. At least one antenna element (76) is supported by the first sub-structure and by each of the plurality of second sub-structures. Antenna elements of the first sub-structure and at least some of the plurality of second sub-structures enable a spread spectrum communication between a terminal (13) and at least one low earth orbit satellite (12) over a range of elevation angles of the low earth orbit satellite.
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patent: 4162499 (1979-07-01), Jones, Jr. et al.
patent: 4605932 (1986-08-01), Butscher et al.
patent: 4792808 (1988-12-01), Hildebrand
patent: 4816836 (1989-03-01), Lalezari
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4980692 (1990-12-01), Rudish et al.
patent: 5233626 (1993-08-01), Ames
patent: 5243354 (1993-09-01), Stern et al.
patent: 5303286 (1994-04-01), Wiedeman
Dietrich Frederick J.
Monte Paul A.
Globalstar L.P.
Hajec Donald T.
Ho Tan
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