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Adaptive RF Front-Ends for Hand-held Applications

  • Book
  • © 2011

Overview

Authors:
  1. Andre van Bezooijen

    1. EPCOS Netherlands, Nijmegen, Netherlands

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  2. Reza Mahmoudi

    1. , Electrical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands

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  3. Arthur van Roermund

    1. , Electrical Engineering, Technical University Eindhoven, Eindhoven, Netherlands

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  • Tunable and re-configurable RF front-ends for mobile phones have much research interest
  • The cellular phone industry seems to move gradually towards adaptive RF front-ends
  • A similar book on adaptive RF frond-ends is not available

Part of the book series: Analog Circuits and Signal Processing (ACSP)

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Table of contents (5 chapters)

  1. Front Matter

    Pages i-xv
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  2. Introduction

    • André van Bezooijen, Reza Mahmoudi, Arthur van Roermund
    Pages 1-8

  3. Adaptive RF Front-Ends

    • André van Bezooijen, Reza Mahmoudi, Arthur van Roermund
    Pages 9-33

  4. Adaptive Impedance Control

    • André van Bezooijen, Reza Mahmoudi, Arthur van Roermund
    Pages 35-106

  5. Adaptive Power Control

    • André van Bezooijen, Reza Mahmoudi, Arthur van Roermund
    Pages 107-128

  6. Conclusions

    • André van Bezooijen, Reza Mahmoudi, Arthur van Roermund
    Pages 129-130

  7. Back Matter

    Pages 131-153
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Keywords

About this book

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.

Authors and Affiliations

  • EPCOS Netherlands, Nijmegen, Netherlands

    Andre van Bezooijen

  • , Electrical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands

    Reza Mahmoudi

  • , Electrical Engineering, Technical University Eindhoven, Eindhoven, Netherlands

    Arthur van Roermund

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