Design of a UWB/Tri-Band Reconfigurable Flexible Antenna for IoT Applications

In this paper, a compact, geometrically simple, ultra-wide band, flexible and tri band antenna is proposed for IoT applications. The proposed antenna is designed on commercially available flexible substrate material Roger RT5880, having relative permittivity, loss tangent and thickness of 2.2, 0.0009 and 0.79 mm, respectively. The circular patch is loaded with a rectangular stub in order to enhance the bandwidth and return loss. Afterwards, the circular patch is cleaved to integrate a diode in order to achieve frequency reconfigurability. The simulation and analysis of proposed reconfigurable antenna was done using Higher Frequency Structural Simulator (HFSS). Furthermore, to demonstrate the potential of the proposed work, it is compared with state-of-the-art works for similar applications.