EFFICIENT HIGH GAIN WITH LOW SIDELOBE LEVEL ANTENNA STRUCTURES USING CIRCULAR ARRAY OF SQUARE PARASITIC PATCHES ON A SUPERSTRATE LAYER

This article proposes efficient high gain with low sidelobe level (SLL) antenna structures using circular array of square parasitic patches (CASPPs) for wireless applications. The antenna structure consists of a microstrip antenna that feeds a CASPP fabricated on a low cost FR4 superstrate. The patches on superstmte are suspended in air at about lambda(0)12. The structure with 19-element CA,SPPs is designed, fabricated, and tested. The measured VSWR is 20 dB. Antenna with CASPPs on finite ground requires 25% less ground plane size as compared to planar coral. The proposed structure can be packaged inside an application platform. (C) 2010 . Microwave Opt Technol Len 52:2812-2817, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.2561