ABSTRACT
This chapter introduces network parameters that are used to obtain response of the available electrical equivalent circuit models for transistors. In transistor modeling, network parameters are used as a mathematical tool for designers to model and characterize critical parameters of devices by establishing relations between voltages and currents. Network parameters are analyzed and studied using two-port networks. The two-port network is described by a set of four independent parameters, which can be related to voltage and current at any port of the network. Networks and components in engineering applications can be connected in different ways to perform certain tasks. The commonly used network connection methods are series, parallel, and cascade connections. Vector network analyzers (VNAs) are used to measure and characterize radio frequency (RF) and microwave components and devices via scattering parameters. VNAs have coaxial ports and need an interface called test fixture to measure the characteristics of the noncoaxial devices under test.
