Publication

Abstract : Now a day, the wearable textile materials of the antenna seems to be a great extent in the miniaturization of wireless devices. The demand of the wearable antennas in rise because of their use in smart clothes in wireless communications. Basic requirements for wearable antennas are a planar structure and flexible construction materials. A novel wearable reconfigurable antenna is designed to provide optimal on-body performance at 2.4 GHz and 5.8 GHz in Industrial, Scientific and Medical bands (ISM). This wearable antenna is constructed in the area of 11mm  11mm and it is based on the micro strip feeding connection that depends on switch for providing two frequency bands. The copper and flexible polyurethane foam respectively makes the conductive and ground planes. Here, copper acts as a conductor and polyurethane foam provides isolation between the human body and the antenna. Here micro strip feeding is provided for enhancing the reliability of the O-shaped antenna. The O-shaped antenna has two kinds of steps, those are, step 1 (OFF mode) and step 2 (On mode). In ON mode the O-shaped antenna gives the frequency of 2.38 - 2.52 GHz and OFF mode gives 5 - 5.5 GHz. Additionally, the performance of the O-shaped antenna is analysed by reflection coefficient and radiation pattern. The step 1 and step 2 antennas achieved the reflection coefficient of -26.9 dB and -19.96 dB respectively.