Effect of dielectric materials on UWB antenna for wearable applications

摘要

This paper represents the implementation of Ultra Wideband (UWB) antenna with circular patch for wearable applications. Wearable antenna is used in various fields such as medical, mobile communication, navigation and military. Wearable antenna is an intelligent device which is part of smart clothing. These antennas should have low profile, light weight & should be very flexible for wearing. Textile patch antenna uses fabric material for substrate, patch and ground and it becomes part of wearable clothing. To improve bandwidth & reduce surface wave losses fabric dielectric constant should be as low as possible. Specific Absorption Rate (SAR) is a crucial factor in designing such antennas. As antenna has to be wearied by the person, SAR should have least value. Here, effect of various substrate materials on the performance parameters like Return loss, Voltage Standing Wave Ratio (VSWR), Bandwidth, Radiation pattern, SAR are observed. All the structures are designed to work in the UWB range from 2 to 12GHz and above, and simulated using Ansys HFSS software.