Design and Implementation of a Partially-Grounded Dual-Band Compact Patch Antenna with Enhanced Selectivity for Multiservice Wireless Communication Applications

This paper presents a partially-grounded dual-band compact patch antenna with high selectivity for 2.4 GHz and 6.4 GHz wireless communication systems.The design concept is to achieve the 2.4 GHz resonance by using a simple patch, then introducing a U-shaped slot at the patch to grant the 6.4 GHz resonance.In order to minimize the design geometry without effecting the antenna performance, a center square cut-out is inserted into the center of the patch with two other cut-outs etched out from the upper part of the patch.For the selectivity enhancement, the partial ground plane is presented and studied.The proposed antenna reveals good performance and both bands can be independently controlled by tuning and adjusting various parts of the antenna.The proposed antenna is designed on a Rogers RT5880 substrate with thickness of 1.57 mm and overall dimension of 30x30 mm 2 using CST-MW package and the simulated results are verified experimentally with very good agreement between the two approaches.The impedance bandwidths are 0.4 GHz and 0.2 GHz at 2.4 GHz and 6.4 GHz, respectively.The gains of the proposed antenna are 1.2 dB and 1.21 dB, respectively with return loss of -37.70 dB and 36.90 dB, respectively.The proposed dual-band compact antenna exhibits omni-directional radiation patterns and achieves a better gain in comparison to monopole antennas.