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What parameter is the antenna bandwidth ?

Last Updated on：2024-09-30 09:45:14

The concept of antenna bandwidth:

Bandwidth: Bandwidth is a measure of the amount of spectral space occupied by a communication or data signal.

For antennas, it refers to the frequency range within which the antenna's electrical parameters remain within allowable limits as the operating frequency changes. This corresponding frequency range is called the bandwidth.

It is usually expressed as the difference between the frequencies at which the signal amplitude nominally decreases by 3dB relative to the amplitude at the center frequency, also known as the 3dB bandwidth. These frequency points represent the half-power points of the amplitude versus frequency function.

Additionally, there is the necessary bandwidth, which refers to the minimum spectral space typically required for the effective transmission and reception of communication or data signals.