Passive Multibeam Satellite Coverage Reallocation After Spot Failure

The patent extracts and removes the redundancy circuits from the passive antenna system, keeping only the essential RF chains. This eliminates the complex switching networks and redundancy management hardware while maintaining reliability through the alternative approach of using multiple radiating feeds per beam without redundant amplification paths.

Instead of using redundant RF chains with switching networks to achieve reliability, the patent inverts the approach by using a single RF chain that feeds multiple radiating elements, where the focal network provides the redundancy path. The failure mode is inverted from RF chain failure to beam formation failure, which is less critical.

The patent applies local quality by assigning different functions to different parts of the antenna system. Each radiating feed is optimized for its specific beam formation role, with precise phase and amplitude control at each feed element. This local optimization maintains high directivity while using a simpler overall architecture without redundant circuits.

The patent changes the operational parameters of the radiating feeds, controlling phase and amplitude independently at each feed element to achieve precise beam forming. This parameter control enables high directivity performance while using a non-redundant architecture, as the beam shape and direction are controlled through parameter adjustment rather than hardware redundancy.