Antenna tuning for mobile devices: The state of the art and some glimpses of the future

Author

Boyle, K.R. ; Spits, E. ; de Jongh, M.A. ; Sato, Seiki ; Bakker, T. ; van Bezooijen, A.

Author_Institution

EPCOS UK Ltd., Bracknell, UK

fYear

2012

fDate

12-13 Nov. 2012

Firstpage

1

Lastpage

1

Abstract

This presentation introduces a self-contained adaptive antenna tuner for use in mobile phone applications. It allows efficient operation over a wide frequency range with high Q antennas (i.e., antennas for which the impedance changes significantly with frequency). It also adaptively mitigates of the effects of user interaction by measuring the antenna performance and implementing a closed-loop control algorithm that improves the match between the antenna and the PA/LNA. This is achieved using an onboard microcontroller, such that only DC and synchronization inputs are required from the host device.

Keywords

closed loop systems; low noise amplifiers; microcontrollers; mobile antennas; mobile handsets; power amplifiers; DC inputs; PA/LNA; Q antennas; antenna performance; antenna tuning; closed-loop control algorithm; mobile devices; mobile phone applications; onboard microcontroller; self-contained adaptive antenna tuner; synchronization inputs; user interaction; wide frequency range; Adaptive arrays; Antenna measurements; Impedance; Mobile antennas; Mobile handsets; Tuners; adaptive; antenna; closed-loop; mobile; phone; reconfigurable; tuner;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference (LAPC), 2012 Loughborough

Conference_Location

Loughborough

Print_ISBN

978-1-4673-2218-8

Electronic_ISBN

978-1-4673-2219-5

Type

conf

DOI

10.1109/LAPC.2012.6402943

Filename

6402943