16.15 CONSTANT-k BAND-STOP FILTER
Constant-k T-section and Π-section prototype band-stop filters are shown in Fig. 16.15-1.
Fig. 16.15-1 (a) Prototype Band-Stop T-Section (b) Prototype Band-Stop Π-Section
Therefore, L1C1 has to be equal to L2 C2 if the filter is to be of constant-k type. This constraint is imposed on band-pass filter design.
Note that the constraint L1C1 = L2C2 results in both series branch and shunt branch resonating ...
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