Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2007-02-28
2008-12-16
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S779000
Reexamination Certificate
active
07466282
ABSTRACT:
A method and apparatus for receiving signals transmitted from a plurality of communications satellites. An apparatus in accordance with the present invention comprises a reflecting surface having a focal point, and a plurality of low noise block down converters with feedhorns (LNBFs), each LNBF having a boresight, wherein at least a first LNBF receives signals in a first frequency band transmitted from a first communication satellite location that are focused at a first focal point and at least a second LNBF receives signals in a second frequency band transmitted from a second satellite location that are focused at a second focal point, wherein the boresight of the first LNBF is closer to the first focal point than the boresight of the second LNBF is to the second focal point.
REFERENCES:
patent: 5812096 (1998-09-01), Tilford
patent: 6181293 (2001-01-01), Muhlhauser et al.
patent: 6600730 (2003-07-01), Davis et al.
patent: 7068616 (2006-06-01), Chang et al.
Chen Ernest C.
Ho Kesse
Norin John
Santoru Joseph
Chen Shih-Chao
The DIRECTV Group Inc.
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