A broadband CPW-fed T-shaped antenna for wireless communications

A novel broadband, dual-polarised coplanar-waveguide-fed T-shaped uniplanar antenna is presented. The raidation mechanism of such an antenna has been investigated, based on a full- wave numerical analysis and experimental measurement. In addition, the equivalent transmission line model incorporated with lumped-circuit elements is also presented to account for its radiation characteristics. Its performance has also been evaluated by integrating a 4-element CPW-fed T-shaped uniplanar antenna array with a simple beam forming network - a 4 � 4B utler matrix. Its compact, low cost, easy-to-fabricate features together with good radiation characteristics are promising for application in wireless communication systems.

[1]  Y. Rahmat-Samii,et al.  The tab monopole , 1997 .

[2]  Zhenghe Feng,et al.  Multibeam plane array using modified Butler matrix circuits , 1999, 1999 Asia Pacific Microwave Conference. APMC'99. Microwaves Enter the 21st Century. Conference Proceedings (Cat. No.99TH8473).

[3]  X.-D. Wu,et al.  Coplanar waveguide fed coplanar strip dipole antenna , 1994 .

[4]  Reinmut K. Hoffmann,et al.  Handbook of microwave integrated circuits , 1987 .

[6]  Tzyy-Sheng Horng,et al.  Radiation of printed antennas with a coplanar waveguide feed , 1995 .

[7]  Gabriel M. Rebeiz,et al.  CPW-fed active slot antennas , 1994 .

[8]  Theodore S. Rappaport,et al.  Smart Antennas for Wireless Communications: Is-95 and Third Generation Cdma Applications , 1999 .

[9]  Gabriel M. Rebeiz,et al.  CPW-Fed Slot Antennas on Multilayer Dielectric Substrates , 1994, European Microwave Conference.

[10]  Ruey Bing Hwang,et al.  Switched beam system for low-tier wireless communication systems , 2001, APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577).

[11]  Yu-De Lin,et al.  Coplanar waveguide-fed uniplanar bow-tie antenna , 1997 .

[12]  A.K.Y. Lai,et al.  FDTD optimization of beam forming network for multibeam antenna , 1998, IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36.