The problem of unsatisfactory attenuation performance in the stop-band in the prototype filter has been addressed satisfactorily in the previous section. The problem of non-zero attenuation in the pass-band due to imperfect termination at the filter output remains. We are constrained to load the filter by a load resistance RL from a practical point of view. We will, of course, make Ro equal to RL, but that will result in Zo-termination only at DC frequency. We address this issue in the current section.

The solution lies in interposing a two-port reactive network between the filter output and the load resistance. This network should have a property such that its input impedance is ZoT (we assume ...

Get Electric Circuits and Networks now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.