Directional wideband wearable antenna with circular parasitic element for microwave imaging applications
Koma’rudin, N. A.; Zakaria, Z.; Althuwayb, A. A.; Lago, H.; Alsariera, H.; Nornikman, H.; Al-Gburi, A. J. A.; Soh, P. J. (2022-02-24)
N. A. Koma’rudin, Z. Zakaria, A. A. Althuwayb, H. Lago, H. Alsariera et al., "Directional wideband wearable antenna with circular parasitic element for microwave imaging applications," Computers, Materials & Continua, vol. 72, no.1, pp. 983–998, 2022, https://doi.org/10.32604/cmc.2022.024782
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2022051836463
Tiivistelmä
Abstract
This work proposes a wideband and unidirectional antenna consisting of dual layer of coplanar waveguide based on the circular parasitic element technique. The design procedure is implemented in three stages: Design A, which operates at 3.94 GHz with a bandwidth of 3.83 GHz and a fractional bandwidth (FBW) of 97.2%; Design B, which operates at 3.98 GHz with a bandwidth of 0.66 GHz (FBW of 56.53%); and Design C as the final antenna. The final Design C is designed to resonate at several frequencies between 2.89 and 7.0 GHz for microwave imaging applications with a bandwidth of 4.11 GHz (79.8%) centered at 5.15 GHz. This antenna is fabricated fully using two textile materials: felt as the substrate and ShieldIt as the conductor. It features a unidirectional radiation with a gain of 5.5 dBi, and reduced low back radiation from 2.06 to−7.81 dB. The front-to-back ratio (FBR) for Design A, Design B and Design C are 4.82, 2.94 and 11.36 dB, respectively. This antenna is wideband with unidirectional radiation, lightweight, and flexible.
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