TY  - BOOK
AU  - van Bezooijen,Andre
AU  - Mahmoudi,Reza
AU  - van Roermund,Arthur
ED  - SpringerLink (Online service)
TI  - Adaptive RF Front-Ends for Hand-held Applications
T2  - Analog Circuits and Signal Processing
SN  - 9789048199358
AV  - TK7888.4 
U1  - 621.3815 23
PY  - 2011///
CY  - Dordrecht
PB  - Springer Netherlands
KW  - Engineering
KW  - Data transmission systems
KW  - Microwaves
KW  - Systems engineering
KW  - Circuits and Systems
KW  - Solid State Physics
KW  - Input/Output and Data Communications
KW  - Microwaves, RF and Optical Engineering
N1  - 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
N2  - 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
UR  - http://148.231.10.114:2048/login?url=http://link.springer.com/book/10.1007/978-90-481-9935-8
ER  -