Design of the Frequency-Tunable CMOS RF Power Amplifier

This chapter presents the design of an integrated frequency-tunable RF power amplifier for operation in the 3.7 and 5.2 GHz frequency bands. A novel tunable impedance matching network based on coupled inductors is employed at the output of the amplifier. The design of the complete system is described, which includes the integrated planar coupled inductors, the circuit that controls the current flowing through the inductors, and the RF power amplifier. Simulation results for the complete system integrated in a CMOS technology are presented.