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 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 x 49 x 19 mm(3). 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.

Automated summary

This article presents a flexible wearable KIT monopole antenna for biomedical application, utilizing a metamaterial unit cell to improve performance. The antenna and metamaterial are fabricated on a polydimethylsiloxane substrate and operate at 2.45 GHz. The integration of the metamaterial improves gain and reduces SAR, with an overall dimension of 49 x 49 x 19 mm(3). The antenna is safe for biomedical applications, as shown by the fabricated prototype.