A Star Polygon with Concentric Circular slot DGS for Wlanlwimax Applications

Abstract

The star polygon patch with concentric circular slot DGS for WLAN and WiMAX applications. The circular slot DGS is introduced at ground plane to improve the impedance bandwidth, high gain. The proposed antenna operate at three different frequencies are 3.6 GHz, 5.5 GHz and 7 GHz with 10 dB return losses are −16.02 dB, −18.80 dB and −21.50 dB. The co polarization and cross polarization (XP) are observed and XP are found at is 0°, −22 dB(xz plane) and −26 dB (yz plane) at is 90° for3.6 GHz. The radiation patterns are observed at is 0° and is 90° in xz and yz plane for three resonance bands. The co and cross polarization has presented and cross polarization is found below 20 dB at one plane of each angle and operating frequency. The simulation results of maximum gain is 7.42 dB at 3.6 GHz of proposed antenna.