Howtosignalprocessing
How do you reduce Sidelobes?
Sidelobe levels can be reduced by tapering the edges of the aperture distribution (changing from uniformity) at the expense of reduced directivity. The nulls between sidelobes occur when the radiation patterns passes through the origin in the complex plane.
What are side lobes radar?
Radar, echo sounders (fishfinders) and sonars all generate a "main beam", which is also known as the "main lobe". "Side lobes" are transmitted energy that is outside of the "main beam" or "main lobe". Reflections from side lobes can sometimes cause false targets and/or "noise" on your display.
How are side lobes formed?
Sidelobes are an unfortunate reality of all directional antennas. They are a consequence of nature and are directly related to diffraction effects in light – and there are similar effects in sound and water waves. Diffraction occurs whenever there is a sharp discontinuity in a radiating or reflecting surface.
