bandwidth - Frequency response bandwidth

Syntax

Description

fb = bandwidth(sys) computes the bandwidth fb of the SISO dynamic system model sys, defined as the first frequency where the gain drops below 70.79 percent (-3 dB) of its DC value. The frequency fb is expressed in rad/TimeUnit, where TimeUnit is the time units of the input dynamic system, specified in the TimeUnit property of sys.

For FRD models, bandwidth uses the first frequency point to approximate the DC gain.

fb = bandwidth(sys,dbdrop) further specifies the critical gain drop in dB. The default value is -3 dB, or a 70.79 percent drop.

If sys is an S1-by...-by-Sp array of models, bandwidth returns an array of the same size such that

fb(j1,...,jp) = bandwidth(sys(:,:,j1,...,jp))

See Also

dcgain | issiso

Free Control Systems Interactive Kit

Learn more about resources for designing, testing, and implementing control systems.

Get free kit

Trials Available

Try the latest control systems products.

Get trial software