Define main lobe, side lobe, minor lobe and back lobe with reference to antenna radiation pattern.

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13. Define main lobe, side lobe, minor lobe and back lobe with reference to antenna radiation pattern.

Major Lobe: Major lobe is also called as main beam and is defined as “the radiation lobe containing the direction of maximum radiation”. In some antennas, there may be more than one major lobe.

Minor lobe: All the lobes except the major lobes are called minor lobe.

Side lobe: A side lobe is adjacent to the main lobe.

Back lobe: Normally refers to a minor lobe that occupies the hemisphere in a direction opposite to that of the major(main) lobe .

Minor lobes normally represents radiation in undesired directions and they should be minimized.

main lobe, side lobe, minor lobe and back lobe
main lobe, side lobe, minor lobe and back lobe


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