Performance Analysis of Body-Worn Antenna for Wearable Textile Substrates

This paper proposes the effect of closeness of the human body phantom model to the textile antenna (TA) where fabric materials (wash cotton, curtain cotton, and polycot) have been utilized as substrates. The antennas are designed to operate at 2.45 GHz frequency for on body wireless communication. Here, circular shape TA with curtain cotton provided return loss (−52.43 dB), bandwidth (107.4 MHz at frequency range 2.3982 to 2.5056 GHz), peak directivity 8.83 dBi with a peak gain of 7.11 dBi when body phantom is applied at 2 mm distance from the TA at 2.452 GHz and the radiation efficiency recorded is 68.07%. The overall antenna performance of each antenna without body phantom is satisfactory for the desired application. The specific absorption rate (SAR) for CMPA (curtain cotton) is 0.029 W/kg< 2 W/kg averaged over 10 g tissue.