University of Hertfordshire

Adaptive impedance matching and antenna tuning for green software-defined and cognitive radio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

View graph of relations
Original languageEnglish
Title of host publicationMidwest Symposium on Circuits and Systems
Number of pages4
ISBN (Electronic)978-1-61284-855-6
ISBN (Print)978-1-61284-856-3
Publication statusPublished - 1 Jan 2011
Event2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS) - Korea, China
Duration: 7 Aug 201110 Aug 2011


Conference2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS)


Impedance matching between the power amplifier and antenna is crucial for efficient power transfer in a green transmitter. A single antenna with a software-configurable tuning unit can serve the functions of multiple antennas which are otherwise required by multistandard wireless communications. Impedance matching and tuning must be adaptive and in real time for fast varying frequencies and surroundings of mobile communications. Small size and low power consumption must also be met in such tuning systems for mobile phones and terminals. This paper overviews automatic antenna tuning for modern and future generation mobile communications. Recent advances in impedance monitoring methods, fast tuning algorithms and programmable matching systems are discussed. Latest effort in integrating automatic impedance tuning systems on a silicon chip is also introduced.


“This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder." “Copyright IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.”

ID: 434479