Design of All Textile Ultra-Wideband Monopole Antenna for Wearable Applications

This paper proposes the design of all textile ultra-wideband (UWB) monopole antenna. The textile antenna structure includes of the octagonal-shaped patch and modified ground plane. Conventional rectangular ground plane is modified as curve-shaped ground plane with circular parasitic patch. By using this ground plane structure, it can shift the lowest edge of impedance bandwidth to lower frequency and enhances the directivity. The textile antenna can provide a compact size having dimension of 35 × 40 × 1 mm
³
. Based on simulation, the impedance bandwidth of antenna is 138% (2.36-12.78 GHz) and maximum gain is 5.19 dBi at 7 GHz. The textile antenna achieves very wide bandwidth covering ISM band and UWB which is suitable for wearable applications.