**5. State-of-the-art WCE transmitting and receiving antennas**

An antenna plays a very crucial role in WCE systems. Wireless capsule transmitting and receiving antennas belong to wireless communication unit, which provides a bidirectional communication between the capsule and the external communication unit at recommended frequency at which industrial, scientific and medical band was established. Wireless capsule endoscopy transmitting antenna is for sending out the detected signal and receiving antenna receive the signal outside human body. This section is to discuss the current performance of both WCE transmitting and receiving antennas.
