Impedance Bandwidth Enhancement of Monopole Antenna with Triangle Slot in the Ground plane and Modified Patch for UWB applications

This article discusses a planar monopole antenna with high impedance bandwidth for Ultra-Wideband (UWB) Applications. The three monopole antenna i.e: Monopole A, B, and C are designed on 5 x 5 x 1.6 FR4 Substrate has a return loss below −10dB from 2 to more than 20 GHz. There is an improvement of impedance bandwidth and directivity by adding a triangle slot in the ground plane and a slot in the patch for the Monopole C antenna. From 2.5 GHz to 8.29 GHz antenna has a return loss of less than -20dB. It also shows that from 2.35 GHz to 10.9 GHz antenna has a return loss below -15dB. In the frequency, 8 GHz antenna monopole A has a directivity of 5.98 dBi and antenna monopole C reaches a directivity of 7.01 dBi. The improvement of the sidelobe level of 3.1 dB is reached for Monopole C at 8 GHz. It indicated that Monopole antenna suitable use for UWB applications