This post details about What is the difference between HPBW and FNBW?, What is HPBW in an antenna?, What is the full form of FNBW?
What is the difference between HPBW and FNBW?
The difference between HPBW (half power beamwidth) and FNBW (first zero beamwidth) is how they measure the angular spread of an antenna’s radiation pattern. HPBW is the angular width where the radiation intensity falls to half of its maximum value, indicating the width of the main lobe. FNBW, on the other hand, is the angular width between the first nulls on either side of the main lobe, showing the angular distance at the points where the radiation intensity first falls to zero. HPBW is commonly used to describe the directivity and focus of an antenna, while FNBW provides insight into the resolution and sidelobe characteristics.
What is HPBW in an antenna?
HPBW in an antenna refers to the angle, measured in degrees, between the points on either side of the main lobe of the radiation pattern where the power drops to half (or -3 dB) of its peak value. This is a key parameter for understanding how concentrated or directional the antenna radiation is, with a narrower HPBW indicating a more directional antenna.
What is the full form of FNBW?
The full form of FNBW is the first zero beamwidth. This term describes the angular width between the first nulls on either side of the main lobe in an antenna’s radiation pattern. This is an important measurement for evaluating the resolution and extent of sidelobes in the antenna radiation pattern.
The two types of beamwidth commonly mentioned in the context of antenna radiation models are HPBW (half power beamwidth) and FNBW (first zero beamwidth). HPBW measures the angular width of the main lobe at half the maximum power level, while FNBW measures the angular width between the first nulls on either side of the main lobe, providing information about the overall antenna radiation propagation and its characteristics of the lateral lobe.
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