A constant K-type filter is a filter that satisfies the following relationship:
Z
1
Z
2
=K
2
(13.21)
where Z
1
is the series arm impedance.
Z
2
is the shunt arm impedance.
K is the design impedance or nominal impedance or zero characteristic impedance.
Constant K-type filters can be of T-type or p -type. These filters are also called prototype filters
because other complex type of filters can be derived from constant K-type filters. Constant
K-type filters may be of low-pass type, high-pass type, band-pass type or band-stop type. These
are discussed in the following sections.
13.8.1 Constant ...
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