Title :
A Compact Hepta-Band Loop-Inverted F Reconfigurable Antenna for Mobile Phone
Author :
Li, Yue ; Zhang, Zhijun ; Zheng, Jianfeng ; Feng, Zhenghe ; Iskander, Magdy F.
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A folded loop-inverted F reconfigurable antenna for mobile phone applications is designed and the obtained results are discussed in this communication. It is shown that loop antenna mode and an inverted F antenna (IFA) mode are controlled by only one p-i-n diodes with simple bias circuit. The impedance can be matched by adopting a matching bridge for both the loop and IFA modes. In a compact volume of 60 × 5 × 5 mm3, the proposed antenna operates in hepta-band, including GSM850, GSM900, GPS, DCS, PCS, UMTS and WLAN, with the return loss lower than 6 dB. A prototype of the proposed antenna is fabricated, measured, and obtained results including return loss, efficiency and gain, are presented.
Keywords :
3G mobile communication; Global Positioning System; cellular radio; impedance matching; loop antennas; mobile handsets; multifrequency antennas; p-i-n diodes; planar inverted-F antennas; wireless LAN; DCS; GPS; GSM; IFA mode; PCS; UMTS; WLAN; compact hepta-band loop-inverted F reconfigurable antenna; folded loop-inverted F reconfigurable antenna; impedance matching; matching bridge; mobile antennas; mobile phone; p-i-n diodes; return loss; Antenna measurements; Bandwidth; Mobile antennas; Mobile handsets; P-i-n diodes; Handset antennas; Mobile antennas; impedance matching; multiple band antennas; reconfigurable antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2167949
