Multi-beam satellite communications payload with flexible...

Details Multi-beam satellite communications payload with flexible... Multi-beam satellite communications payload with flexible...

2007-02-20

2007-02-20

Urban, Edward F. (Department: 2618)

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

C455S012100, C370S316000, C370S318000, C370S323000, C370S325000

Reexamination Certificate

active

10429368

ABSTRACT:
A communications payload configuration comprising a multi-port amplifier that incorporates remotely controllable travelling wave tube amplifiers (TWTAs) for allowing their output power to be adjusted depending on the traffic demand and the payload operational conditions. The power delivered by each TWTA is controlled by adjusting the TWTA anode voltage in response to a command signal received from the ground station. If a TWTA fails, the power delivered by each of the remaining TWTAs is increased by gross anode voltage control. The power lost by the failure is thus recovered by increasing the power of the remaining TWTAs. This power control is done in a constant efficiency way by also readjusting the TWTA collector voltages.

REFERENCES:
patent: 5610556 (1997-03-01), Rubin
patent: 5936592 (1999-08-01), Ramanujam et al.
patent: 6091934 (2000-07-01), Berman et al.
patent: 6799014 (2004-09-01), Rosen et al.
patent: 2002/0068526 (2002-06-01), Butte et al.

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