Adaptive RF Front-Ends for Hand-held Applications
Synopsis
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.
Book details
- Edition:
- 2011
- Series:
- Analog Circuits and Signal Processing
- Author:
- Andre van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund
- ISBN:
- 9789048199358
- Related ISBNs:
- 9789048199341
- Publisher:
- Springer Netherlands
- Pages:
- N/A
- Reading age:
- Not specified
- Includes images:
- Yes
- Date of addition:
- 2022-08-26
- Usage restrictions:
- Copyright
- Copyright date:
- 2011
- Copyright by:
- Springer Science+Business Media B.V.
- Adult content:
- No
- Language:
- English
- Categories:
- Computers and Internet, Nonfiction, Science, Technology