Adaptive RF Front-Ends for Hand-held Applications
Nonfiction, Science & Nature, Science, Physics, Solid State Physics, Technology, Electronics, Circuits
| Author: | Andre van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund | ISBN: | 9789048199358 |
| Publisher: | Springer Netherlands | Publication: | October 28, 2010 |
| Imprint: | Springer | Language: | English |
| Author: | Andre van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund |
| ISBN: | 9789048199358 |
| Publisher: | Springer Netherlands |
| Publication: | October 28, 2010 |
| Imprint: | Springer |
| Language: | English |
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.
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.
