Abstract
Recently, many medical electronic devices have been developed that can be implanted deep inside the body. These devices are designed to transmit information collected from deep inside the body for receiving antennas outside the body. Therefore, we proposed a wireless information transmission system that transmits datum from deep inside the body to the outside using capacitive coupling. In this study, we designed LC impedance matching circuit at the receiver front end and performed analog and digital information transmission test using simulated human body made of NaCl solution. As a result, received voltage is increased by about 20mV by inserting impedance matching circuit (analog transmission and digital transmission) at the carrier frequency of 2.5MHz. In addition, the transmitting voltage that can be demodulated that it was 500 mV when impedance matching circuit was inserted.
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