... i.e., a 7-pole (n = 7) Butterworth prototype should be chosen 3.2.2 Chebyshev Lowpass Prototype Filters For Chebyshev lowpass prototype filters having a transfer function given in (3.9) with a passband ... With the same pole Butterworth lowpass prototype as that used previously in Section 3.3.1, Figure 3.15(b) illustrates a bandpass having a passband from to GHz obtained using the element transformation ... such as Z0, Zn+1, Lai, Y0, Yn+1, and Cai, may be chosen arbitrarily and the filter response will be identical to that of the original prototype, provided that the immittance inverter parameters...