How are bandwidth and frequency related?

Cut off frequency and bandwidth The frequency range 0 ≤ ω ≤ ω b in which the magnitude of the closed loop does not drop -3 dB is called the bandwidth of the system . The bandwidth indicates the frequency where the gain starts to fall off from its low-frequency value.

The bandwidth is often defined by the frequency that is half-attenuated, or at the midpoint between the most output and no output . This is called the 3 dB bandwidth, also known as the cutoff frequency.

The basic difference between the two is that frequency is defined as the rate of radio signal to send and receive communication signals, whereas bandwidth is defined as the difference between the highest and the lowest frequencies of a signal generated .