Stretchable Dual Band PDMS Wearable Antenna Design for ISM Band

In this paper, we propose a new dual band wearable antenna design for ISM band applications. The proposed antenna consists of polydimethylsiloxane (PDMS) substrate with dielectric Constant $\varepsilon$r=2.65, Loss Tangent tan $\partial$=0.02 and thickness h=2 mm. The volume of the wearable antenna is 42×9×0.08 mm
³
, and the conductive part of patch is made with copper material. The antenna exhibits a good efficiency of 94 %, large bandwidth ranging from 2.13 GHz to 3.39 GHz and from 5, 30 GHz to 6.23 GHz, with a good return loss (S11) values of -19dB at 2.4 GHz and -22dBat 5.8 GHz.