Terahertz (THz) Novel Antenna Design for Body-Centric Wireless Communication

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2021
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This paper presents a compact swan-shaped novel Terahertz (THz) antenna design for body-centric wireless communications. The proposed microstrip-fed antenna has partial ground, is based on a graphene substrate, and has a broader bandwidth in the terahertz frequency spectrum. Computer Simulation Technology (CST) Microwave Studio is used to design and test the antenna. The antenna's ability to convert energy into radiation was assessed by measuring its radiation efficiency and gain. Its performance as directivity, HPBW, sidelobe level, bandwidth, and return loss were also discussed. The antenna's accessible on-body frequency bandwidth was also analyzed using a body model. Simulated results show that the antenna has a return loss of under 10 dB for the simulated frequency of over 6–9.3 THz and a centered frequency of around 6.52 THz. Though the radiation efficiency is less, it has a directivity of 11.47 dBi, a gain of 4.403 dBi, a sidelobe level of -3.1 dB, and a VSWR of around one at 8 THz frequency. For the on-body scenario, the antenna was simulated over five different distances at 100-micrometer intervals from the bottom of the antenna substrate to a human torso phantom for terahertz radiation. It is seen from simulated data that radiation efficiency increases as the distance from the skin increases. Free space results are systematic with the return loss and VSWR over the distances. Compared to other terahertz patch antennas, this design performed similarly while being somewhat more compact. Because of its small size and outstanding on-body performance, this antenna will be a potential alternative for body-centric communications.
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Electrical and Computer Engineering
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North South University
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