T/R module for satellite TT and C ground link

Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array

Reexamination Certificate

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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.

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