A Dual Band UWB antenna for WCE Systems

In this paper, a compact ultra-wideband (UWB) antenna is designed for Wireless Capsule Endoscopy (WCE) systems by applying several miniaturization and bandwidth enhancement techniques. The antenna is designed on Roger RT5880 as a substrate having ε
_r
= 2.2 and thickness of 0.254 mm. The volume of the optimized antenna is only 28.9 mm
³
. The performances of the antenna are investigated inside a homogeneous human muscle layer. The -10 dB S
₁₁
bandwidth for the first band is from 5.72 GHz to 6.26 GHz and for the second band is from 8.12 GHz to 8.58 GHz. It shows omnidirectional radiation patterns. Maximum power of 24 mW can be set as input to the proposed antenna in order to comply with the IEEE C95.1-2005 safety standards.