Bandwidth and gain enhancement of microstrip antenna by frequency selective surface for WLAN, WiMAX applications

The research work presents a broad band with enhanced gain FSS based microstrip patch antenna for wireless communication. Three different antennas results are investigated to obtain proposed antenna. The designed antennas are E shaped patch, combined E and T shaped patch and combined E and T shaped patch with frequency selective surface (FSS). The proposed antenna is obtained by combined E and T shaped radiating patches with FSS under the modified ground plane. U shaped slit with multiple number of slots are loaded on the ground plane. The broad bandwidth of 6.4 GHz (2.9–9.3 GHz) with 8.12 dBi gain is achieved which is 5.12 dBi greater than the proposed E and T shaped patch (without FSS) antenna. The proposed patch antenna without FSS is fabricated and measured to validate the work. The designed antenna is very much applicable in wireless communication systems. It is specially designed for WiMAX (3.5/5.8 GHz) and WLAN (3.6/4.9/5/5.9 GHz) applications.