Discussion
What is the trade when an array is designed for very low side lobes?
Answer: D
Tapering the aperture widens the beam and lowers the aperture efficiency, and the random error floor must be pushed below the design level, which raises the precision required of every component. Very low side lobe arrays are therefore expensive out of proportion to their size. Bandwidth and scan range are affected by other choices, and the cost per element rises rather than falls. Knowing what a specification will cost before committing to it is much of the art of system engineering.
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