Fork-like shaped monopole antenna with defected parasitic elements and ring slots

This work investigate the effect of the defected parasitic element and ring slot on the ground plane at the fork-like shape monopole antenna. Firstly, the basic fork-like shape antenna with a slot and parasitic patch had been designed in the CST Microwave Studio. Then, this antenna had been improved by embedded some defected structure in stage by stage at the ground plane - Design B, Design C, and Design D. The structure had been apply is the parasitic patch and ring slot. The optimal result of this dual-band antenna for Design D is 2.45 GHz and 5.22 GHz with a gain of 4.043 dB and 3.496 dB and the return loss of - 34.875 dB and - 18.03 dB. The target application for this antenna is at 2.45 GHz and 5.2 GHz of the frequency band.