Wireless power transmission is being investigated as a means to operate tiny medical devices such as the capsular endoscope, which is able
to exist for a long period during diagnostic procedures within the body. In this paper, we examine the wireless power transmission to a capsular endoscope by electromagnetic waves to show its usability for medical applications. A modified helical antenna inside the endoscope is proposed as a power receiving antenna, operating at 915 MHz. By calculating a maximum received power in the stomach using such
antenna, the results show that adequate power can be well received.
