A novel wearable monopole antenna with controlled SAR using metamaterial

This article presents a flexible wearable KIT monopole antenna for biomedical application. A metamaterial unit cell is proposed to improve the antenna performance. The proposed antenna and the metamaterial are fabricated on 1 mm-thick polydimethylsiloxane substrate to operate in the ISM frequency ba...

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Bibliographic Details
Published inInternational journal of microwave and wireless technologies Vol. 15; no. 9; pp. 1524 - 1536
Main Authors Ramasamy, K., Sapna, B. A., Jayasheela, M.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.11.2023
Subjects
Antennas
Bend radius
Biomedical Applications
Biomedical materials
Copper
Design
Dielectric properties
Frequencies
Geometry
Metamaterials
Monopole antennas
Polydimethylsiloxane
Radiation
Simulation
Substrates
Tolerances
Unit cell
Wearable technology
metamaterial
SAR
wearable antenna
Flexible monopole
PDMS
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Summary:This article presents a flexible wearable KIT monopole antenna for biomedical application. A metamaterial unit cell is proposed to improve the antenna performance. The proposed antenna and the metamaterial are fabricated on 1 mm-thick polydimethylsiloxane substrate to operate in the ISM frequency band of 2.45 GHz. Integration of the metamaterial improves the gain and reduces the specific absorption rate (SAR) of the antenna. The overall dimension of the antenna with the metamaterial is 49 × 49 × 19 mm3. The designed antenna is investigated for the loading effect of the body by placing on the hand phantom model. Bending tolerances are also analyzed for x and y direction with various bend radii. Gain and SAR of the proposed antenna are 4.61 dBi and 0.868 W/kg. The results of the fabricated prototype show that the proposed wearable antenna is safe for biomedical applications.
ISSN:1759-0787
1759-0795
DOI:10.1017/S1759078723000338