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High-Q Implantable Resonator for Wireless Power Delivery

The Magnetically Coupled Resonant Wireless Power Transmission (MCR-WPT) is a promising technique to deliver milliwatts of power to mm-size implanted devices at centimeter distances. Such a resonant link is primary dependent on the Q factor of the implanted magnetic resonator, since the transmitting bears much less design constraints. This work uses a high Q topology. The 3 mm implantable resonator has a state-of-the-art quality factor of 61.4 when measured in saline water. This medium emulates the worst-case scenario of human tissue dielectric properties.