Annular Ring UWB Wearable Textile Antenna for Telemetry and Healthcare Applications

A wearable microstrip UWB antenna employing jeans textile material as a substrate is proposed and analyzed. Two variants of conducting material comprising copper tape and copper wire of thickness of 0.1mm are utilized as patch and ground. The overall antenna volume is 50 x 50 x 1 mm3 with an impedance bandwidth of 24.13 GHz (0.87 to 25 GHz) and a peak gain of 10.93 dB at 14.80 GHz. The design comprising an annular ring structure with connecting feed at the optimized location has been analyzed and optimized using FEM based ANSYS High-Frequency Structural Simulator. The low values of Specific Absorption Rate (SAR) 1.23W/kg, 1.26W/kg, and 0.64W/kg averaged over 1-g of tissue for arm, leg, and head respectively at 2.45 GHz validate the antenna design for wearable telemetry applications. The proposed design is also analyzed under different bent radii for wearable applications. Measured results for both prototypes agree well with the simulated results.

Automated summary

A wearable microstrip UWB antenna using jeans textile material as a substrate is introduced and examined. The antenna design incorporates copper tape and copper wire as conducting materials for the patch and ground respectively. The optimized annular ring structure with connecting feed achieves an impedance bandwidth of 24.13 GHz and a peak gain of 10.93 dB at 14.80 GHz. The antenna design is validated for wearable telemetry applications with low Specific Absorption Rates (SAR) of 1.23W/kg, 1.26W/kg, and 0.64W/kg averaged over 1-g of tissue for arm, leg, and head respectively at 2.45 GHz. Additionally, the proposed design is analyzed for different bent radii suitable for wearable applications, and the measured results align well with the simulated results.