What is side lobe suppression?

What is side lobe suppression?

Sidelobe suppression has been implemented in many radar systems, including ATCRBS, to solve a common problem. This problem occurs due to signal leakage in the directional antenna. When interrogation signals are transmitted with a directional antenna, the signal often leaks through the sides of the antenna.

What causes radar side lobes?

The Radar System – Technical Principles Diffraction occurs whenever there is a sharp discontinuity in a radiating or reflecting surface. On the antenna arrays so far described we have a number of elements all radiating and suddenly the antenna ends, which creates diffraction or sidelobe type effects.

What causes side lobes in ultrasound?

Side lobe artifacts occur where side lobes reflect sound from a strong reflector that is outside of the central beam, and where the echoes are displayed as if they originated from within the central beam.

How do I reduce my side lobes?

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 is the difference between side lobes and grating lobes?

Side lobes are always present in an ultrasonic sound field. They are only troublesome when they are strong enough to produce indications of significant amplitude to look like a defect indication. 2. Grating lobes are caused by the periodic spacing of individual array elements in an ultrasonic sensor.

What is side lobe level in antenna?

Sidelobe Level is information how large (or small) are side lobes in the radiation pattern of an antenna. Usually they are compared to the maximum level of the mainbeam, and the difference is expressed in dB.

What is side lobe ratio?

The PSLR is defined as the ratio of the highest sidelobe peak power Ps to the main lobe peak power Pm of the pulse response function, which indicates the ability of the SAR system to observe weak scattering points near the strong scattering points. From: Bistatic Synthetic Aperture Radar, 2022.