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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.
| Autorius: | Andre van Bezooijen, Arthur H. M. Van Roermund, Reza Mahmoudi, |
| Serija: | Analog Circuits and Signal Processing |
| Leidėjas: | Springer Netherlands |
| Išleidimo metai: | 2014 |
| Knygos puslapių skaičius: | 172 |
| ISBN-10: | 9400799144 |
| ISBN-13: | 9789400799141 |
| Formatas: | 235 x 155 x 10 mm. Knyga minkštu viršeliu |
| Kalba: | Anglų |
Parašykite atsiliepimą apie „Adaptive RF Front-Ends for Hand-held Applications“
