Adaptive RF Front-Ends for Hand-held Applications / Analog Circuits and Signal Processing (PDF)
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...
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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.
- Autoren: Andre Van Bezooijen , Reza Mahmoudi , Arthur H. M. van Roermund
- 2010, 2011, 153 Seiten, Englisch
- Verlag: Springer-Verlag GmbH
- ISBN-10: 9048199352
- ISBN-13: 9789048199358
- Erscheinungsdatum: 28.10.2010
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- Dateiformat: PDF
- Größe: 5.50 MB
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