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Bandwidth vs Beamwidth-difference between antenna bandwidth and beamwidth

This page on antenna bandwidth vs beamwidth describes difference between antenna bandwidth and beamwidth terms. The links to other antenna terms are also provided.

Antenna Bandwidth

As we know bandwidth is the portion of electromagnetic spectrum occupied by a signal. In other words, bandwidth is the difference between upper and lower frequency limits of the signal or operating range of the RF equipment.

The antenna bandwidth is defined as frequency range over which antenna can transmit or receive the information in the form of EM waves.

Example: Half wave dipole antenna transmits in the frequency range from 380 MHz to 470 MHz then,
Bandwidth of antenna is 470-380 = 90 MHz.

Antenna Beamwidth

Antenna Beamwidth

Electro-magnetic waves radiated in different directions by the antenna is referred as radiation pattern. Directivity of the antenna is measured in terms of antenna beamwidth. The angular width of the beam radiated by antenna is measured by HPBW (half-power beam width). In other words, angular separation between two points from center of the antenna radiation pattern is referred as beamwidth. These two points are located at one half of the maximum power on the radiation pattern, often referred as 3-dB points.

Refer Antenna Terminology➤➤

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