DocumentCode :
1041712
Title :
Compact Multiband Folded Loop Chip Antenna for Small-Size Mobile Phone
Author :
Chi, Yun-Wen ; Wong, Kin-Lu
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung
Volume :
56
Issue :
12
fYear :
2008
Firstpage :
3797
Lastpage :
3803
Abstract :
A multiband folded loop chip antenna with a very small volume of 1 cm3 (40 times 5times 5 mm3) is presented. The antenna has a simple metal pattern comprising a folded loop strip and a tuning pad, and is especially suited for application in small-size mobile phones (groundplane length 60 mm only) for multiband operation. The metal pattern is attached on the surfaces of a foam base, and the first three resonant loop modes (0.5-, 1.0-, and 1.5-wavelength modes) of the antenna can be excited with good impedance matching by simply adjusting proper dimensions of the tuning pad and its location along the folded loop strip. The excited 0.5-wavelength mode forms as the antenna´s lower band at about 900 MHz for GSM operation, while the 1.0- and 1.5-wavelength modes are formed into a wide operating band at about 1900 MHz for the antenna´s upper band to cover DCS/PCS/UMTS operation. Design considerations of the proposed folded loop chip antenna are described, and effects of the tuning pad on controlling the performances of the antenna are shown.
Keywords :
loop antennas; mobile antennas; mobile handsets; multifrequency antennas; DCS-PCS-UMTS operation; GSM operation; a tuning pad; compact multiband folded loop chip antenna; folded loop strip; impedance matching; metal pattern; resonant loop modes; small-size mobile phone; 3G mobile communication; Antennas and propagation; Distributed control; GSM; Mobile antennas; Mobile handsets; Personal communication networks; Printed circuits; Printing; Resonance; Chip antennas; folded loop antennas; internal mobile phone antennas; mobile phone antennas; multiband antennas;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2008.2007280
Filename :
4718013
Link To Document :
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