Giuseppe peano fractal loaded multiband antenna using parasitic strips for THz applications

Abstract

Multi - functional antennas are desired for future wireless applications like medical imaging, cancer detection, sensing, explosive detection, weather monitoring, automotive and industrial applications etc. In this paper, Multi band terahertz (THz) antenna is integrated on micro device Rogers RT / Duroid 6010 dielectric material having 5 µm thickness and is designed biasing on very thin graphene layer acts as radiating element having thickness of 0.5 µm. Giuseppe peano fractal (GPF) loaded on conventional rectangular microstrip patch in addition of two parasitic strips is simulated using Ansys High frequency structure simulator (HFSS) for multiband applications. This antenna attributes with compact dimensions of 20 µm × 20 µm and resonates with six bands at 3.58 THz, 5.86 THz, 6.28 THz, 6.64 THz, 7.45 THz and 7.96 THz. Designed antenna attains impedance bandwidth (IBW) of 80 GHz (3.53 – 3.61 THz), 80 GHz (5.81 – 5.89THz), 50 GHz (6.25 – 6.30 THz), 170 GHz (6.57 – 6.74 THz), 80 GHz (7.43 – 7.51 THz) and 170 GHz (7.88 – 8.05 THz) with small bandwidth ratio’s (BR) of 1.022, 1.013, 1.008, 1.025, 1.010 and 1.021 at resonant bands respectively. Radiation efficiency (η) at corresponding resonant frequencies are 90.16 %, 88.80 %, 87.25 %, 94.14 %, 83.87 % and 93.73 %. The electromagnetic characteristics such as reflection coefficient (S11), bandwidth (BW), voltage standing wave ratio (VSWR), group delay (td), input impedance (Zin), radiation patterns, gain (G) and radiation efficiency (η) are appraised in this paper.