抄録
Transcutaneous energy transmission system (TETS) was studied in order to realize a complete implanted artificial heart. A electromagnetic induction coupling was used in most TETS. Because the living body can be considered as a conductive and a dielectric material, it is possible to drain a high frequency current through direct or capacitive coupling into the body. In this study, We studied possibility of the high frequency current energy transmission through direct of capacitive coupling. A direct or capacitive coupling TETS was developed using two 2 cm square aluminum foils as electrodes of the TETS. For capacitive coupling TETS the electrodes covered with polymethl pentene film. A energy transmission test was performed using a meat as a phantom, a 4 MHz frequency and 500 Ω impedance power supply, a rectifying circuit and resistance load. Transmission electricity decreased to nearly 10% with 500 Ω load, however it remained in 80% with 5 Ω load. A cause of low transmission efficiency seems that the high frequency current passed through not only the resistance load but also the phantom. For improvement of the transmission efficiency, the electrode shape is resigning and the high frequency power supply impedance is adjusting.
