Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2006-07-04
2006-07-04
Phan, Dao L. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S374000
Reexamination Certificate
active
07071873
ABSTRACT:
Transmit/Receive (T/R) module that provides multiple simultaneous ground to satellite links with rapid pointing and acquisition. The (T/R) module incorporates independent gain and phase control. Left-hand or right-hand circular polarization can be supplied to dual feed antennas. Present invention allows each antenna to be independently polarized. Low-cost componentry is utilized throughout. On-board control of the (T/R) module is obtained using a complex programmable logic device (CPLD) and a micro controller. CPLD provided separate control of four phase shifters, attenuators, channel polarization as well as transmitter on/off control. Telemetry is provided through built-in test (BIT) routine.
REFERENCES:
patent: 4914441 (1990-04-01), Brookner
patent: 5923289 (1999-07-01), Buer et al.
patent: 6388631 (2002-05-01), Livingston et al.
patent: 6606055 (2003-08-01), Halsema et al.
Bharj Sarjit S.
Oleski Paul J.
Tomasic Boris
Turtle John P.
Mancini Joseph A.
Phan Dao L.
The United States of America as represented by the Secretary of
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