SUBWAVELENGTH METAMATERIAL-BASED RESONANT CAVITIES FED BY MULTIPLE SOURCES FOR HIGH DIRECTIVITY

The analysis and design of subwavelength metamaterial-based resonant cavity antenaas are presented. The antennas under investigation are formed by embedding a feeding source in a Fabry-Perot (FP) cavity composed of a Perfect Electrical Conductor (PEC) surface and a metasurface reflector. The embedded feeding source used in this study is a 2 x 2 microstrip patch array. The influence of the interelement spacing of the patch array feed on the radiation patterns is investigated and reported. The effect of the cavity thickness is also considered. Finally, the design of highly directive subwavelength cavity antennas is presented. (C) 2009 Wiley Periodicals. Inc. Microwave Opt Technol Lett 51: 1883-1888, 2009 Published online in Wiley InterScience (www. interscience.wiley.com). DOI 10.1002/mop.24485