Title :
Modified T-shaped planar monopole antennas for multiband operation
Author :
Chen, Sheng-Bing ; Jiao, Yong-Chang ; Wang, Wei ; Zhang, Fu-Shun
Author_Institution :
Nat. Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an
Abstract :
In this paper, we propose a novel modified T-shaped planar monopole antenna in that two asymmetric horizontal strips are used as additional resonators to produce the lower and upper resonant modes. As a result, a dual-band antenna for covering 2.4- and 5-GHz wireless local area network (WLAN) bands is implemented. In order to expand the lower band, a multiband antenna for covering the digital communications systems, personal communications systems, Universal Mobile Telecommunications Systems, and 2.4/5-GHz WLAN bands is also developed. Prototypes of the multiband antenna have been successfully implemented. Good omnidirectional radiation in the desired frequency bands has been achieved. The proposed multiband antenna with relatively low profile is very suitable for multiband mobile communication systems
Keywords :
3G mobile communication; UHF antennas; antenna radiation patterns; microwave antennas; monopole antennas; multifrequency antennas; 2.4 GHz; 5 GHz; T-shaped planar monopole antennas; Universal Mobile Telecommunications Systems; digital communications systems; multiband antennas; omnidirectional radiation; personal communications systems; wireless communication; wireless local area network; 3G mobile communication; Broadband antennas; Digital communication; Distributed control; Dual band; Geometry; Mobile antennas; Mobile communication; Prototypes; Wireless LAN; Monopole antenna; multiband antenna; wireless communication;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.877811