Electronic Circuits with MATLAB, PSpice, and Smith Chart

8Two‐Port Network and Parameters

CHAPTER OUTLINE

1. 8.1 Two‐Port Parameters
   1. 8.1.1 Definitions and Examples of Two‐Port Parameters
   2. 8.1.2 Relationships Among Two‐Port Parameters
   3. 8.1.3 Interconnections of Two‐Port Networks
   4. 8.1.4 Curse of Port Condition
   5. 8.1.5 Circuit Models with Given Parameters
   6. 8.1.6 Properties of Two‐Port Networks with Source and Load
2. 8.2 Scattering Parameters
   1. 8.2.1 Definition of Scattering Parameters
   2. 8.2.2 Two‐Port Network with Source/Load
3. 8.3 Gain and Stability
   1. 8.3.1 Two‐Port Power Gains
   2. 8.3.2 Stability
   3. 8.3.3 Design for Maximum Gain
   4. 8.3.4 Design for Specified Gain
4. Problems

This chapter introduces two‐port parameters such as immittance parameters, hybrid parameters, and transmission (ABCD) parameters, and scattering parameter.

8.1 Two‐Port Parameters ^[Y-1]

You might feel like calling any pair of terminals in a circuit a port if only an external element can be connected between the two terminals (nodes). However, in order for a pair of terminals to be a port, it should satisfy the port condition or current requirement that the current flowing into the circuit through one terminal must equal the current flowing out of the circuit through the other terminal. In fact, for one‐port (two‐terminal) networks, we do not have to bother about the port condition since Kirchhoff's current law (KCL) does not allow the port condition to be violated for any pair of terminals. This is no longer true for two‐port networks.

Figure 8.1 A two‐port network.

A circuit ...