A capacitively loaded antenna for use in mobile handsets

Author

Elfergani, I.T.E. ; Abd-Alhameed, R.A. ; See, C.H. ; Child, M.B. ; Excell, P.S.

Author_Institution

Mobile & Satellite Commun. Res. Centre, Univ. of Bradford, Bradford, UK

fYear

2010

Firstpage

441

Lastpage

444

Abstract

A tuneable slotted patch antenna design is presented and verified for use in the DCS, PCS and UMTS bands. The tuning circuit consists of two varactor diodes, with some passive components, and is integrated fully with the radiator patch, with the varactors occupying different locations over the slot. The tuning does not require any further modification to the patch or feed geometry. Good agreement is observed between the predicted and observed impedance bandwidth, return loss, gain and radiation pattern, throughout the range 1.70 GHz-2.05 GHz.

Keywords

UHF antennas; antenna feeds; antenna radiation patterns; circuit tuning; microstrip antennas; mobile antennas; mobile handsets; multifrequency antennas; slot antennas; varactors; DCS band; PCS band; UMTS band; capacitively loaded antenna; feed geometry; impedance bandwidth; mobile handset; radiation pattern; radiator patch; tuneable slotted patch antenna design; tuning circuit; varactor diode; Antenna measurements; Antenna radiation patterns; Loaded antennas; Tuning; Varactors; reconfigurable antennas; slot patch antennas; varactor diode;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference (LAPC), 2010 Loughborough

Conference_Location

Loughborough

Print_ISBN

978-1-4244-7304-5

Type

conf

DOI

10.1109/LAPC.2010.5666208

Filename

5666208