Broadband Modified Rectangular Ring Patch Antenna

Abstract

This paper presents a novel broadband modified rectangular ring patch antenna for wireless communication. A modified rectangular
microstrip antenna with protruding semi ellipse having an air gap in between the two dielectric substrate layers of patch antenna is analyzed using the IE3D simulation software. By protruding semi ellipse of appropriate dimension close to one of the edges, the rectangular patch has been shown to realize dual-frequency broadside radiations. Once the  frequency response of the dual-element can be controlled, we can get a broad bandwidth antenna configuration by overlapping the two-element frequency response. Several optimizations are performed to attain the optimum values of the antenna physical parameters which gives an impedance bandwidth more than 0.94 GHz or 27.64%. The E and H plane radiation patterns in entire impedance bandwidth are identical in shape and direction of maximum radiations is normal to patch geometry.