e/Sidelobe

Information
has gloss	eng: In antenna engineering, side lobes are the lobes of the far field radiation pattern that are not the main beam, where the terms "beam" and "lobe" are synonyms. An antenna radiation pattern is more commonly called a beam pattern. The power density in the side lobes is generally much less than that in the main beam. It is generally desirable to minimize the sidelobe level (SLL), which is measured in decibels relative to the peak of the main beam. The main lobe and side lobes occur for both conditions of transmit, and for receive. The concepts of main and side lobes, aperture shapes, and aperture weighting, apply to problems in radar and optics (two specific applications of electromagnetics) and in sonar.
lexicalization	eng: side lobe
lexicalization	eng: Side-lobe
lexicalization	eng: Sidelobe
instance of	(noun) an electrical device that sends or receives radio or television signals aerial, antenna, transmitting aerial

Meaning
French
has gloss	fra: Les lobes secondaires sont les pics secondaires dans le diagramme démission ou de réception dune antenne autre que le lobe principal ou le lobe arrière de celle-ci. En effet, selon la configuration de lantenne, elle peut être directionnelle en azimut (gisement) et en élévation (angle de site) en concentrant la majorité de son énergie démission ou sa sensibilité de réception dans une direction. Cependant, on ne peut complètement rendre le patron nul dans les autres directions.
lexicalization	fra: Lobe Secondaire

Media
media:img	Gain ouverture rect.png
media:img	Radar-Secondary lobes.png
media:img	Typical Antenna Pattern.jpg
media:img	Typical antenna pattern with grating lobes.jpg