Design and Evaluation of Modified Circular Wearable Ultra-Wideband Antenna

The wearable antenna is a planar antenna made of textile materials as the substrate. Several frequency bands have been assigned for wearable antennas such as Industrial Scientific Medical (ISM) having frequency range from 2.4 GHz to 5.8 GHz and Ultra-Wide Band (UWB) having frequency range 3.1 GHz to 10.6 GHz. In recent days, Ultra-Wide Band antennas are widely used because of their low transmission power requirements and high data rate. The major challenge for designing a wearable antenna is to attain a broader bandwidth of a compact textile antenna having high radiation efficiency. The main object of this paper is to design and to analyze UWB antennas with different textile materials. The optimum antenna has a compact size of 27 × 31 mm² with a thickness of 1.75 mm. From all substrate materials, the antenna with ARLON-AD 320 show higher bandwidth and the antenna with FERRO A6M exhibits highest radiation efficiency. This proposed antenna can be exploited for personnel activities in remote areas and risky environments or in health monitoring purposes.