Satellite communications apparatus using active redundancy

Details Satellite communications apparatus using active redundancy Satellite communications apparatus using active redundancy

1996-06-06

1998-10-06

Biegel, Ronald L.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

H01Q 322

Patent

active

058183884

ABSTRACT:
An active redundancy system for high power satellite communications payloads that use multiple antenna beams driven by multiple power amplifiers and that require power redistribution among the beams during the lifetime of a payload uses a number of power amplifiers equal to or greater than the number of antenna feeder elements to provide extra output power at the beginning of life, instead of commonly used redundancy switches. As power amplifiers fail, the amplitude and phase of the signals driving the remaining power amplifiers are adjusted to maintain antenna performance. Power amplifiers having sufficient capacity are used to ensure that, given an anticipated number of power amplifier chain failures, performance requirements can be met at the end of life.

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patent: 5132694 (1992-07-01), Sreenivas
patent: 5530449 (1996-06-01), Wachs et al.

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