Discussion
Why does an active array degrade gracefully?
Answer: A
With hundreds or thousands of independent modules, the loss of a few reduces the aperture very slightly and raises the side lobes a little, rather than disabling the system. A passive array with one central transmitter fails completely if that transmitter fails. Spare amplifiers, mechanical reconfiguration and automatic power increase are not how it works. This reliability argument is often as important as the performance one in justifying an active array.
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