THE PROPOSED SMALL HELICAL ANTENNA WITH PARASITIC ELEMENTEND APPLICATION
DOI:
https://doi.org/10.59266/houjs.2023.278Keywords:
Small cylindrical helical antenna (NMHA), passive element, impedance matching, voltage standing wave factor (VSWR), smart implantAbstract
Small cylindrical helical antennas are well-suited for smart implants. However, small cylindrical helical antennas in resonance have a very small input impedance (about a few Ω), so an impedance-matching solution for the antenna is required. In this paper, the author proposes a small cylindrical helical antenna structure combined with a parasitic element that is also a cylindrical helical antenna to match impedance with a 50 Ω transmission line without the need for impedance matching circuits, antenna conductors not in the form of a cylindrical but in the form of a strip line. With this structure, the overall size of the antenna remains compact and can be used in smart implant applications.
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