Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2006-11-21
2009-02-17
Phan, Tho G (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S756000, C343SDIG001
Reexamination Certificate
active
07492324
ABSTRACT:
A satellite system10having a first satellite14at a first orbital slot B has a first transponder32and a second generating a first downlink signal44B at a first frequency and a second downlink signal44C at a second frequency. An outdoor unit is directed toward the first satellite14and includes a support structure, a reflector64coupled to the support structure and reflecting the first downlink signal and the second downlink signal. A first feed66B is coupled to the support structure and receives the first downlink signal. A second feed70C is concentric with the first feed66B and is coupled to the support structure and receives the second downlink signal.
REFERENCES:
patent: 6504514 (2003-01-01), Toland et al.
patent: 6577283 (2003-06-01), Wu et al.
patent: 6747608 (2004-06-01), Wu
patent: 6947702 (2005-09-01), Green, Sr.
Loner Patrick J.
Stroes Gustave
Phan Tho G
The DIRECTV Group Inc.
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