Future wireless communication needs antenna with multifunctional operation. This paper focuses on Terahertz Antenna that could be easily integrated with micro and nano devices. In this paper, an octagonal shaped Microstrip Fractal Antenna loaded with the EBG structure is designed for tri-band terahertz application. Triple band characteristic achieved by fractal radiating patch is loaded with Electronic Band Gap (EBG). The antenna features with total size of 700x900 µm 2 and resonates on three bands at 0.948 THz, 0.984 THz and, 1.040 THz. The result and performance indicates that the recommended antenna will be suitable for compact wireless devices and Monolithic Microwave Integrated Circuit (MMIC). All simulation work has been completed using electromagnetic software Ansoft High Frequency Structure Simulator (HFSS) and CST studio suite. The electromagnetic features like S11 parameters, VSWR, gain, efficiency and the radiation characteristics of suggested antenna are also examined. The simulation results show that this antenna has 9 dB realized gain at 0.948 THz resonating frequency.
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