Metamaterial enhanced high gain antenna for WiMAX application

A high gain low-profile antenna design using metamaterial technology operating at WiMAX 2.5-GHz band (2.50-2.69 GHz) is constructed and measured. A metamaterial superstrate, composed of stacked S-shaped split-ring resonators, can modify the radiation pattern and exhibit gain enhancement functionality. In addition, the proposed structure can be made in economic 4-layer via-less FR-4 printed circuit boards. Therefore applying this technology to commercial applications becomes more practical. With this thin metamaterial superstrate (1.4 mm thick and 10.5 mm above the antenna ground), the patch-based antenna can achieve a maximum gain of 12.2 dBi. The impedance bandwidth of the proposed antenna is about 390 MHz (2.50-2.89-GHz, defined by 2:1 VSWR standard).

[1]  Guy Vandenbosch,et al.  Aperture field analysis of gain enhancement method for microstrip antennas , 1997 .

[2]  S. Enoch,et al.  COMPACT DIRECTIVE ANTENNAS USING METAMATERIALS , 2002 .

[3]  Jiangtao Huangfu,et al.  Left-handed materials composed of only S-shaped resonators. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[4]  H. Legay,et al.  A metallic Fabry-Perot directive antenna , 2006, IEEE Transactions on Antennas and Propagation.

[5]  F. Bilotti,et al.  Metamaterial covers over a small aperture , 2004, IEEE Transactions on Antennas and Propagation.

[6]  Nicolaos G. Alexopoulos,et al.  Fundamental superstrate (cover) effects on printed circuit antennas , 1984 .

[7]  J. Vardaxoglou,et al.  High gain planar antenna using optimised partially reflective surfaces , 2001 .

[8]  Chun-Yih Wu,et al.  Design of antenna radome composed of metamaterials for high gain , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.

[9]  Lei Zhou,et al.  Directive emissions from subwavelength metamaterial-based cavities , 2005 .