Triple Band U-Capping Slotted Microstrip Patch Antenna Using DGS for Wireless Applications

Proposed triple band microstrip patch antenna is successfully designed at 3.5 GHz for Wi-MAX, 5.8 GHz for WLAN and 7.5 GHz for broadcasters’ applications. The rectangular geometry of antenna is described by having a single via in center of U-capping slotted patch to ground and using L-slotted DGS. Such types of microstrip patch antenna meets the requirement of triple band frequency operation for wireless communication by modifying the shaped of U-capping slot on the patch. The parameters of antenna like gain, bandwidth and reflection co-efficient (return loss, S11) have been improved in this work at acceptable limit with reasonable radiation performance. Proposed antenna is simulated using CST V.12 simulator using swarm optimization algorithm technique.