Adaptive RF front-ends for hand-held applications /
| Author / Creator: | Bezooijen, AndreĢ van. |
|---|---|
| Imprint: | Dordrecht ; New York : Springer, c2011. |
| Description: | 1 online resource (xv, 153 p.) : ill. |
| Language: | English |
| Series: | Analog circuits and signal processing Analog Circuits and Signal Processing Series. |
| Subject: | |
| Format: | E-Resource Book |
| URL for this record: | http://pi.lib.uchicago.edu/1001/cat/bib/8896238 |
| Summary: | 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. |
|---|---|
| Physical Description: | 1 online resource (xv, 153 p.) : ill. |
| Bibliography: | Includes bibliographical references (p. 148-153). |
| ISBN: | 9789048199358 9048199352 |