Adaptive RF Front-Ends for Hand-held Applications
van Bezooijen, Andre, Mahmoudi, Reza, van Roermund, Arthur H.M.
Produktnummer:
1892572067b5624f2d8c1c27b2359461e9
| Autor: | Mahmoudi, Reza van Bezooijen, Andre van Roermund, Arthur H.M. |
|---|---|
| Themengebiete: | Adaptive RF front-ends Antenna hand-effects Impedance control Mobile communication |
| Veröffentlichungsdatum: | 13.12.2014 |
| EAN: | 9789400799141 |
| Sprache: | Englisch |
| Seitenzahl: | 153 |
| Produktart: | Kartoniert / Broschiert |
| Verlag: | Springer Netherland |
Produktinformationen "Adaptive RF Front-Ends for Hand-held Applications"
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.
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