Linear CMOS RF Power Amplifiers for Wireless Applications: Efficiency Enhancement and Frequency-Tunable Capability

ISBN-13: 9789048193608 / Angielski / Twarda / 2010 / 220 str.

Paulo Augusto Dal Fabbro; Maher Kayal

Opis

The RF power amplifier is a key component in a wireless transceiver and is considered by many as the design bottleneck in the transmitting chain. Linear CMOS RF Power Amplifiers for Wireless Applications addresses two fundamental aspects in RF power amplifier design for integration in CMOS technologies at 2.4, 3.7 and 5.2 GHz: efficiency enhancement and frequency agility. The well-known linearity-efficiency trade-off is circumvented by employing an efficiency-enhancement technique called the dynamic supply RF power amplifier. The design of this system is described with great detail and compared with other efficiency enhancement techniques. The frequency agility is achieved with a novel impedance matching network based on coupled inductors. The design of a dual-band RF power amplifier is shown, with a careful analysis of the tunable matching network and its interaction with the rest of the circuit. The considerations and conclusions drawn throughout this book are based on simulation as well as measurement results from the integrated circuit prototypes carefully built and respecting best practices in RF design.

Spis treści

Preface.- Notation.- 1 Introduction.- 1.1 Context.- 1.2 Objectives.- 1.3 Book Outline.- References.- 2 Ef?ciency Enhancement.- 2.1 Introduction.- 2.2 Basic Principles.- 2.3 Overview of the Main Ef?ciency-Enhancement Techniques.- 2.4 Conclusion.- References.- 3 Design of the Dynamic Supply CMOS RF Power Ampli?er.- 3.1 Introduction.- 3.2 High-Ef?ciency, Fast Modulator.- 3.3 RF Power Ampli?er.- 3.4 Dynamic Supply RF Power Ampli?er.- 3.5 Conclusion.- References.- 4 Measurement Results for the Dynamic Supply CMOS RF Power Ampli?er.- 4.1 Introduction.- 4.2 Main Evaluation Board.- 4.3 Modulator Characterization.- 4.4 RF Power Ampli?er Characterization.- 4.5 Dynamic Supply RFPA Characterization.- 4.6 Conclusion.- References.- 5 Frequency-Tunable Capability.- 5.1Introduction.- 5.2 De?nitions.- 5.3 Overview of the Existing Frequency-Tunable Techniques.- 5.4 Conclusion.- References.- 6 Design of the Frequency-Tunable CMOS RF Power Ampli?er.- 6.1 Introduction.- 6.2 Output Impedance Matching.- 6.3 Input Impedance Matching.- 6.4 Frequency-Tunable RF Power Ampli?er.- 6.5 Conclusion.- References.- 7 Measurement Results for the Frequency-Tunable CMOS RF Power Ampli?er.- 7.1 Introduction.- 7.2 Stand-Alone RF Power Ampli?er Characterization.- 7.3 Coupled Inductors Characterization.- 7.4 Frequency-Tunable RF PA Measurement.- 7.5 Hybrid Implementation.- 7.6 Analysis and Discussion of the Results.- 7.7 Conclusion.- References.- 8 Conclusion.- 8.1 Highlights.- 8.2 Main Contributions.- 8.3 Future Work.- References.- 9 Appendix A: Measurement Setups and Additional Screenshots.- 9.1 Setups Used for the S-Parameter Measurements.- 9.2 SetupUsedforthe2-ToneMeasurements.- 9.3 Setup Used for the OFDM Measurements.- 9.4 Additional Screenshots.- References. 10 Appendix B: Procedure for Impedance Matching ofPrinted-Circuit RF Ampli?ers.- 10.1 Introduction.- 10.2 Procedure for Impedance Matching.- 10.3 Application Example.- 10.4 Analysis of the Results.- References. Index.