Folded Dual-Loop Antenna for GSM/DCS/PCS/UMTS Mobile Handset Applications

Author

Ku, Chia-Hao ; Liu, Hsien-Wen ; Lin, Sheng-Yu

Author_Institution

Dept. of Electr. Eng., Ming Chi Univ. of Technol., Taipei, Taiwan

Volume

9

fYear

2010

fDate

7/2/1905 12:00:00 AM

Firstpage

998

Lastpage

1001

Abstract

A folded dual-loop antenna suitable for GSM/DCS/ PCS/UMTS applications is proposed. It is fabricated using a pair of symmetric meander strips to form two loops. By properly bending the radiating strips, the antenna can achieve a compact size of 50 (L) × 9 (W) × 9 (H) mm³ to be integrated within a mobile handset device as an internal antenna. With 6 dB return loss, two operating frequency bands covering 847-971 and 1670-2230 MHz can be obtained with our design. Moreover, the resonant characteristics of the antenna can be tuned by using various strip lengths and also spaces between the radiator and the ground plane. Experimental results exhibit that the proposed folded dual-loop antenna features nearly good omnidirectional radiation patterns with proper gain, so it is well suitable to meet GSM/DCS/PCS/UMTS operations for mobile handset applications.

Keywords

antenna radiation patterns; mobile handsets; GSM/DCS/PCS/UMTS mobile handset applications; folded dual-loop antenna; internal antenna; omnidirectional radiation patterns; radiating strips; resonant characteristics; symmetric meander strips; 3G mobile communication; Antenna measurements; Frequency measurement; GSM; Mobile antennas; Mobile handsets; Digital Cellular System (DCS); Folded dual-loop antenna; Global System for Mobile Communications (GSM); Personal Communication System (PCS); Universal Mobile Telecommunication System (UMTS);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2010.2089037

Filename

5605650