Dual polarized pentagon slot based antenna for tri band applications

A novel probe feed dual polarized pentagon slot shaped planar antenna is designed and proposed supporting wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications simultaneously. Structure comprises of pentagon shaped radiating element along with scaled down slot cut on center of patch, having overall compact size of 40×40mm2. The conventional pentagon patch resonates at 3.5GHz and the modified slot based structure resonates at tri bands of 2.4/3.5/5.2GHz. Effective comparison of antenna with and without pentagon slot is performed to obtain better impedance bandwidth, acceptable gain at operating frequencies and circular polarization at 2.4GHz. The simulated results exhibit the designed antenna operates over triple frequency ranges, fulfilling the standards of WiMAX and WLAN. Gain values obtained are 5.6, 3.2, 2.04dB respectively over respective tri bands. In addition, acceptable radiation characteristics are obtained over the operating bands.