Discussion
What happens to the beamwidth of a uniform array as elements are added at constant spacing?
Answer: C
Beamwidth depends on the aperture measured in wavelengths, so adding elements lengthens the array and narrows the beam in inverse proportion. Side lobe level for a uniform distribution stays near minus thirteen decibels however many elements are used, which is one of the more surprising results of array theory. The number of side lobes rises with element count but their relative height does not, and lowering it requires amplitude tapering. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.
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