230 Two-port networks9.13 SELF-ASSESSMENT TEST
1 Define a two-port network.
2 Give two examples of a two-port network.
3 Give another name for a two-port network.
4 Why are the impedance parameters of a two-port network called the open
circuit parameters?
5 Which parameters of a two-port network are also known as the short
circuit parameters?
6 For what purpose are the h-parameters commonly used?
7 What are the inverse h-parameters also known as?
8 Give another name for the ABCD-parameters of a two-port network.
9 Explain what is meant by a symmetrical two-port network.
10 Which two of the ABCD-parameters are always equal in symmetrical two-
port networks?11 Give an example of a symmetrical two-port network.
12 Give an example of an unsymmetrical two-port network.13 Draw a diagram to represent two two-port networks connected in cascade.
14 Explain what is meant by the characteristic impedance (Zo) of a two-port
network.15 Give an expression for the characteristic impedance of a two-port network
in terms of one or more of its ABCD-parameters.
16 Give an expression for the characteristic impedance of a two-port network
in terms of its open and short circuit impedances.
17 Explain what is meant by 'image impedances'.
18 Explain what is meant by the term 'insertion loss' as applied to two-port
networks.
19 Give an expression for the insertion loss of a two-port network in terms of
load currents.
20 Define the term 'propagation coefficient' (3~) as applied to two-port
networks.
21 In general the propagation coefficient is complex and is given by
3' = c~ + j/3. What is the significance of c~ and/3?