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Design and performance investigation of metamaterial-inspired dual band antenna for WBAN applications
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Design and performance investigation of metamaterial-inspired dual band antenna for WBAN applications
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Design and performance investigation of metamaterial-inspired dual band antenna for WBAN applications
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Journal Article
Design and performance investigation of metamaterial-inspired dual band antenna for WBAN applications
2024
Overview
This paper presents the design and analysis of a metamaterial-based compact dual-band antenna for WBAN applications. The antenna is designed and fabricated on a 0.254 mm thick semi-flexible substrate, RT/Duroid® 5880, with a relative permittivity of 2.2 and a loss tangent of 0.0009. The total dimensions of the antenna are 0.26λ o ×0.19λ o ×0.002λ o , where λ o corresponds to the free space wavelength at 2.45 GHz. To enhance overall performance and isolate the antenna from adverse effects of the human body, it is backed by a 2×2 artificial magnetic conductor (AMC) plane. The total volume of the AMC integrated design is 0.55λ o ×0.55λ o ×0.002λ o . The paper investigates the antenna’s performance both with and without AMC integration, considering on- and off-body states, as well as various bending conditions in both E and H -planes. Results indicate that the AMC-integrated antenna gives improved measured gains of 6.61 dBi and 8.02 dBi, with bandwidths of 10.12% and 7.43% at 2.45 GHz and 5.80 GHz, respectively. Furthermore, the AMC integrated antenna reduces the specific absorption rate (SAR) to (>96%) and (>93%) at 2.45 GHz and 5.80 GHz, meeting FCC requirements for low SAR at both frequencies when placed in proximity to the human body. CST Microwave Studio (MWS) and Ansys High-Frequency Structure Simulation (HFSS), both full-wave simulation tools, are utilized to evaluate the antenna’s performance and to characterize the AMC unit cell. The simulated and tested results are in mutual agreement. Due to its low profile, high gain, adequate bandwidth, low SAR values, and compact size, the AMC integrated antenna is considered suitable for WBAN applications.
