Adaptive RF Front-Ends for Hand-held Applications
€ 119,90
Informação do Produto
| ISBN | 9789048199341 |
|---|---|
| Autores | Andre van Bezooijen, Arthur H.M. van Roermund, Reza Mahmoudi |
| Editora | Springer |
| Formato | Capa dura |
| Número de páginas | 153 |
| Peso (kg) | 0,390 |
| Data de Publicação | 05/11/2010 |
| Preço (iva excl.) | € 113,11 |
| Imposto | € 6,79 |
| Preço (iva inc.) | € 119,90 |
| Disponibilidade | 1 unidade em armazém externo |
Descrição do Produto
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.