UWB planar antennas for wireless capsule endoscopy

Wireless capsule endoscopy (WCE) has conquered some limitations of traditional diagnosing tools, such as the comfortlessness of the cables and the inability of examining small intestine section. However, this technique is still far from satisfactory and requires some feasible improvements. Antennas play a major role in achieving these improvements and in building up the communication link between the capsule and the external receiver. Therefore, the design of a WCE transmitter antenna has been investigated in this paper. Two planar antennas are proposed and optimized in this paper. These two planar antennas have an ultrawide bandwidth, omnidirectional radiation pattern and deep return loss, which can meet the requirements for WCE system.