A Smart Neuroscience Platform with Wireless Power Transmission for Simultaneous Optogenetics and Electrophysiological Recording

This paper presents a fully wireless neuroscience platform for enabling uninterrupted optogenetic experiments with live laboratory rodents. The system includes a wireless power transmission (WPT) home-cage using a 4-coil resonant link, a motion tracking system, a multichannel optogenetic headstage and a base station. The WPT home-cage uses a new hybrid parallel power transmitter (TX) coil array and segmented multicoil resonators to achieve high power transmission efficiency (PTE) and deliver high power across distances as high as 20 cm. The multicoil power receiver (RX) uses a RX coil with a diameter of 1.0 cm and a resonator coil with a diameter of 1.5 cm. The WPT home-cage average power transfer efficiency is 29.4%, at a nominal distance of 7 cm, for a power carrier frequency of 13.56 MHz. It has maximum and minimum PTE of 50% and 12% along the Z axis, and can deliver a constant power of 74 mW to supply the miniature neural headstage. The neural headstage includes 1 optical stimulation channel and 4 recording channels. We show that the hybrid WPT home-cage can properly power up the headstage without interruption, while the motion tracking system can track the activity of the animal in real time for enabling simultaneous behavioural and physiological assessment.

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