Discussion
What advantage does digital beamforming give a receiving array?
Answer: A
Because the element signals are stored, as many beams as the processor can compute may be formed at once, all looking in different directions, which multiplies the search rate of a radar or the capacity of a communication system. Grating lobes still depend on spacing, coupling still alters the element patterns, and calibration becomes more critical rather than less, since the processing assumes known amplitude and phase at every channel. Framing the question as which quantity the change acts upon makes the answer follow without calculation.
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