Communications: radio wave antennas – Antennas – Plural antennas
Reexamination Certificate
2006-11-28
2006-11-28
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Plural antennas
C343S853000
Reexamination Certificate
active
07142169
ABSTRACT:
Two pairs of dielectric rod radiators are positioned on an antenna, with one pair in the azimuthal and the other in the elevational plane of the antenna radiation pattern. The axes of each pair are physically canted away from the direction of the main antenna beam. The radiation pattern of the dielectric rod elements is an electromagnetic “well” which is symmetrically located with respect to the axis of the main beam of the antenna with the antenna's beam centered in the “well”. In aiming the antenna, for example, at a transmitting communication satellite, the amplitudes of signals received from the two dielectric rod azimuthal lobes are compared, and signals received from the two dielectric rod elevational lobes are similarly compared to provide servo error information for positioning the antenna beam. Signal processing may utilize a single multiplexed narrow band amplifier.
REFERENCES:
patent: 6906679 (2005-06-01), Kneisel et al.
patent: 6987491 (2006-01-01), Yukl
patent: 6987493 (2006-01-01), Chen
Le Hoang-anh
Robbins Daniel
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