Block diagram representation of a composite filter is shown in Figure 13.68.
Terminating
half
section
Prototype
section
m-Derived
section
Terminating
half
section
Input
Outpu
t
with
m= 0.6
with
m= 0.6
Figure 13.68 A Composite Filter Shown in Block Diagram Form
13.10.1 Composite Low-Pass Filter
Figure 13.69 shows a composite low-pass filter T-section which consists of two terminating half
sections at both source and load, one constant K-type section, and one m-derived section. Figure
13.70 shows a similar composition of a composite low-pass filter in p-section.
mL
2
1−m
2
2m
L
mC
2
mL
2
1−m
2
2m
L
mC
2
1−m′
2
4m′
L
m′C
L
2
L
2
C
m′L
2
m′L
2
Terminating
half section ...
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