Introduction to the RF Power A...

Introduction to the RF Power Amplifiers Design Chapter 1 INTRODUCTION TO THE RF POWER AMPLIFIERS DESIGN

1.

BASIC TERMS AND DEFINITIONS

The general equivalent circuit of power amplifier is shown in Fig. 1-1. It consists of active device (AD), input and output networks and supply and bias circuits1,2. Electrical operation mode of power amplifier can be characterized by the following fundamental parameters: the first harmonic output power P1 , the dc supply power PDC , the efficiency regarding the first harmonic η=P 1 PDC (so-called electronic efficiency), the power gain K P , the passband or amplitude-frequency characteristic, and the nonlinear distortions values. The power-added efficiency (PAE) is also important characteristic accounting the driving signal power.

iC

Input matching network

Active Device (AD) AD Bias network
v CE