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What techniques are used to reduce sidelobes in antenna arrays?

I am working on linear and planar antenna arrays and notice that sidelobes can interfere with other systems or reduce efficiency.
I want to know the practical methods—both amplitude and spacing-based—that can suppress sidelobes while maintaining main beam performance.

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By Stephen Answered 1 year ago

From my experience, sidelobe reduction in antenna arrays can be achieved through amplitude tapering, where the excitation of outer elements is reduced relative to the center, creating a smoother aperture distribution. I have seen designers also adjust element spacing slightly to suppress grating lobes. Techniques like Chebyshev, Taylor, or Binomial weighting are widely used to balance sidelobe suppression and main beam width. I would recommend simulating the array pattern iteratively, as excessive tapering can reduce gain or broaden the main lobe. In practice, a combination of tapering and careful layout yields controlled sidelobes without compromising overall array performance.

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