Approximating Ideal Filters by Systems of Fractional Order

Figure 2

Approximations of [𝐻(𝑓)]^𝑟 for different values of 𝑟. (a) 𝑟=0.1. (b) 𝑟=0.01. (c) 𝑟=0.001. (d) 𝑟=0.0001.

(a)

(b)

(c)

(d)