Andre van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund

Adaptive RF Front-Ends for Hand-held Applications

• Broschiertes Buch

Produktbeschreibung

The RF front-end - antenna combination is a vital part of a mobile phone because its performance is very relevant to the link quality between hand-set and cellular network base-stations. The RF front-end performance suffers from changes in operating environment, like hand-effects, that are often unpredictable.

Adaptive RF Front-Ends for Hand-Held Applications presents an analysis on the impact of fluctuating environmental parameters. In order to overcome undesired behavior two different adaptive control methods are treated that make RF frond-ends more resilient: adaptive impedance control, and adaptive power control.

Several adaptive impedance control techniques are discussed, using a priori knowledge on matching network properties, in order to simplify robust 2-dimensional control.A generic protection concept is presented, based on adaptive power control, which improves the ruggedness of a power amplifier or preserves its linearity under extremes. It comprises over-voltage, over-temperature, and under-voltage protection.

Produktdetails

• Analog Circuits and Signal Processing
• Verlag: Springer / Springer Netherlands
• Artikelnr. des Verlages: 978-94-007-9914-1
• 2011
• Seitenzahl: 172
• Erscheinungstermin: 13. Dezember 2014
• Englisch
• Abmessung: 235mm x 155mm x 10mm
• Gewicht: 272g
• ISBN-13: 9789400799141
• ISBN-10: 9400799144
• Artikelnr.: 42040637

Inhaltsangabe

Symbols.- Abbreviations.- 1 Introduction.- 2 Adaptive RF frond-ends.- 3 Adaptive impedance control.- 4 Adaptive power control.- 5 Conclusions.- Appendix A Overview of adaptively controlled matching networks.- Appendix B A dual-banding technique.- Appendix C Transistor breakdown voltages.- References.- Summary.