Development and In Vivo Performance Evaluation of 10–60-MHz Band Impulse-Radio-Based Transceiver for Deep Implantation Having 10 Mbps

In view of the requirements for high-speed highly reliable wireless implant communication, we have developed an implant transceiver working at a 10-60-MHz band. The developed transceiver is based on an impulse radio technology with multipulse position modulation to increase the communication speed and reliability, and utilizes the automatic equalization technique to suppress waveform distortion and intersymbol interference due to frequency-dependent tissue properties. The transmit antenna has a dimension of 2.6 cm×1.6 cm×1.6 cm and a relative bandwidth of 16% by forming the radiation elements on a flexible magnetic sheet for miniaturization. Through an in vivo experiment on a living swine, we have shown the feasibility of implant communication in a depth up to 26 cm with a minimum data rate of 10 Mb/s. These results demonstrate the superiority of this new technology over all others reported so far in the literature.