HIGHLY DIRECTIVE ISM BAND CAVITY ANTENNA USING A BI-LAYERED METASURFACE REFLECTOR

The design of a highly directive metamaterial-based cavity antenna for a 2.46 GHz application is reported. The proposed structure. is evolved from a Fabry-Perot (FP) cavity with a patch antenna acting as the feed and four metallic walls on the lateral sides. One of the two reflectors is the antenna's ground plane and the other is made from a bilayered metamaterial-based partially reflecting surface (PRS) constituted by a capacitive and an inductive grid. Calculations together with experimental results obtained from the fabricated prototype are presented. The results show a high directivity and low levels for the secondary lobes compared to a 2 X 2 patch antenna array. (c) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1393-1396, 2009: Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24391