Discussion
What is beam broadening used for in a radar array?
Answer: D
Spoiling the aperture phase deliberately widens the transmit beam so a larger volume is illuminated at once, at the cost of gain, while narrow receive beams preserve the resolution. It is a standard search technique. Side lobes are managed by amplitude taper, squint is cured by true time delay, and range resolution follows from the pulse bandwidth rather than from anything the antenna does. Trading one performance dimension for another deliberately is what makes an electronically controlled aperture valuable.
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