Multi-band weakly ground-coupled balanced antenna design for portable devices

Author

Zhou, Dizhi ; Abd-Alhameed, R.A. ; Alhaddad, A.G. ; See, C.H. ; Noras, J.M. ; Excell, P.S. ; Gao, Smith

Author_Institution

Surrey Space Centre, Univ. of Surrey, Guildford, UK

Volume

6

Issue

4

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

306

Lastpage

310

Abstract

A balanced antenna for wireless portable devices applications with multiple band operational performance is investigated and discussed. The designed antenna is weakly ground-couple, although can be considered as an energy-efficient radiator. The antenna structure is a thin-strip planar dipole with a dual-folded structure on each arm. The performance of the proposed antenna is analysed and optimised for WLAN and WiMAX applications over the relevant frequency bands, including the 2.4 and 5.2 GHz WLAN bands and the 2.5 and 3.5 WiMAX bands. For validation, the antenna prototype was fabricated and tested. The performance of this balanced antenna was verified and characterised in terms of the return loss, radiation pattern and power gain. The predicted and measured results show acceptable agreement and the results also confirm good impedance bandwidth characteristics with excellent dual-band operation.

Keywords

antenna radiation patterns; dipole antennas; microwave antennas; mobile handsets; portable instruments; WLAN applications; WiMax applications; antenna radiation pattern; dual-folded structure; energy-efficient radiator; frequency 2.4 GHz; frequency 2.5 GHz; frequency 3.5 GHz; frequency 5.2 GHz; impedance bandwidth characteristics; mobile portable devices; multiband weakly ground-coupled balanced antenna design; power gain; thin-strip planar dipole antenna structure; wireless portable devices;

fLanguage

English

Journal_Title

Science, Measurement & Technology, IET

Publisher

iet

ISSN

1751-8822

Type

jour

DOI

10.1049/iet-smt.2011.0151

Filename

6270255